Tag: retro

Canon AE1 35mm SLR

A sympathetic restoration of a 70s classic camera.

This is a Canon AE1 that was produced around May 1977. I know this because of the date code within the spool area where the film sits. Seeing these units were produced between 1976 – 1984 this particular unit is quite an early one. It is currently 48 years old and looking very good.

Canon AE-1

This camera is part of a batch of cameras recently received from a good friend of mine Jon, who has been in the photography business for more years than he cares to remember… it’s a big number and that’s all I’m saying. I did discuss his very kind donation here: Cameras…i need more!

How did you date this camera?

Surprisingly quite easy. There is a number on most Canon cameras externally, and contrary to belief this is not the ID number, the id number we require is inside the camera, printed in the film spool bay in a very dark ink. You have to position it in the light to view it properly.

ID number in film barrel
The ID number

The number can consist of 4 or more digits. In my case the number is R519. If you go to this site by a guy called Bob Atkinson he has a chart here that explains how to source the date of your Canon Camera or lens: Bob Atkins Photography- Date codes

So using Bobs code the letter “R” refers to the year of manufacture and in this case represents 1977 or 2003 (the dates were recycled when they reached the end of the alphabet) seeing this camera’s production run was between 1976 – 1984, “R” in this case represents 1977. The next two digits represent the month of manufacture, and occasionally in months 1-9 the preceding zero was omitted. In my case considering the number 51 does not represent a Month, the zero was omitted in my case therefore making the month of manufacture “05” hence month 5 – May. So this unit was more than likely produced in May 1977. Occasionally there would be a final letter such as an “F” that would represent the factory it was made in. “F “ would have been the factory in Fukushima. See, that’s how I dated this unit. Check Bob’s site out and date your Canon equipment.

Anyway, here’s a little history about this superb little camera:

The Canon AE-1 is a 35 mm single-lens reflex (SLR) film camera for use with interchangeable lenses, manufactured by Canon Camera K. K. (today Canon Incorporated) in Japan from April 1976 to 1984. It uses an electromagnetically controlled, horizontal cloth focal plane shutter, with a speed range of 2 to 1/1000 second plus Bulb and flashX-sync of 1/60 second. The camera body is 87 mm tall, 141 mm wide, and 48 mm deep; it weighs 590 g. Most are silver, with black grip and chrome trim, but some are black with chrome trim.

Its name refers to the fact that it is an electronic camera using aperture control for automatic exposure. The AE-1 is the first SLR containing a digital integrated circuit, which allowed Canon to integrate more functionality while making the camera smaller. Both the digitally-controlled automatic exposure and the small size helped to make the camera a success: backed by a major advertising campaign, the AE-1 sold over 5.7 million units, which made it an unprecedented success in the SLR market.

Wikipedia

So there is a lot of them about, but it’s rarer now to find one in a good condition. I think I have one that is in a good condition, has very slight signs of ageing (Patina) and shouldn’t take too much effort to get it working again.

Let’s have a closer look at my inherited camera.

Assessment:

It’s been in storage within a foam lined metal box for a few years and this appears to have assisted in maintaining its overall good quality. There are a few slight signs of wear that are present as you would expect with a camera that has been well used but cared for, but there are no major dinks or signs of bits being broken. It has been loved.

Curtain clean and smooth
Silver worn, nice patina
Just a bit dusty
Just needs a good clean

Looking at the shell all the buttons are doing what they should, it’s a bit dusty and grubby and looking through the viewfinder you can see a lot of dust in the view, but I believe this is just dust on the mirror, or at least I hope so.

The camera has attached to it a Canon power winder “A” and this does not work, it has serious corrosion that I suspect that has gone behind the contacts and will need dismantling, cleaning and rebuilding. I will cover this activity in a separate post, whilst this one covers the camera and is a separate activity.

The winder looks good
Inside tells a different story
Old batteries
Serious corrosion

Anyway back to the camera. The wind lever seems to be locked, it can’t be cocked. The shutter doesn’t fire but there does seem to be movement in the exposure meter in the viewfinder but it seems erratic, not quite as it should be. I have a feeling and in fact I’m quite confident it is an electrical issue, as with the Canon A1, a bad power source would render the entire camera useless.

Repair:

With my suspicions about the electrical element on this camera the first thing I did was to do a battery check in the camera. This camera has one cell in it, mounted on the front face just to the right hand side of the lens in a small chamber. It is a 6v lithium battery. I suspect this one has been in place many years.

Battery check button

To check the battery power you look through the viewfinder at the light meter to the right of your field of view and depress the little black button on the top left of the viewfinder on top of the camera.

This. Battery is dead

As you can see above, when you push the little battery check button the needle on the exposure meter moves. It may settle, it may move about, but the battery should be indicating below the 5.6 level to prove it has life, this battery is indicating dead. Let’s confirm that on an external battery checker for confirmation.

Yep. It’s dead

And I think that confirms things for us that this old battery is dead. Fortunately I have plenty of replacements available so I just put a new one in to see what happens.

New battery

The new battery is in place and now you can see the indication has dipped well below 5.6 indicating a healthy battery supply. I push the shutter button and it fires perfectly. Power has been restored.

The lens on this camera is pretty much the stock issue FD 50mm. I have removed it and exposed it to high lighting levels to see if there are any imperfections and I’m pleased to say there are none. No Mould or fungus build up, I must admit my friend who passed this on to me has stored it perfectly. Apart from a little dust build up, I was able to use a lens cloth on both the lens and mirror and the issue was sorted in minutes, not that it was ever an issue really.

View through back
And front

I’ve used a dummy film and the carriage works fine, the lens apertures all react smoothly, and the shutter speed’s respond as they should. There is no shutter scream or lag, and everything seems just right. After spending a good few hours going through the instruction manual and checking all its functions I am happy it is doing just what it should. It is very rare to find such a good condition of camera that requires very little maintenance. It’s a credit to the previous owner.

This is a sympathetic restoration. I’m leaving it looking as it is. I’m not fixing something that isn’t broken, and I will attend to it with lubrication and maintenance as and when it is needed. I will very soon run a roll of film through and see just what comes back as a result. I have a number of films here that are now 20 years out of date so there could be some interesting results.

Result:

A beautiful camera
Stunningly beautiful

The camera has cleaned up beautifully after a good deep clean and polish. I have a superb little example of a well loved and well used retro superstar of the late 70s. In perfect working order and ready once again to be used for what it was designed for. Taking great photographs.

As stated I’m going to run a film through and I will post the results on here whenever I get the time to do so. See the test results here: 20yr old Kodak Gold

My plan is to have this displayed in a case in my workroom alongside my Canon A1 when I have completed its repair. I took up photography in the period of time that these cameras were produced, and they hold great memories and sentimentality for me. They come from a time when cameras had style and innovation, before they all started to look the same, quality and style, it’s what’s missing today.

For someone like me that loves old cameras, I think these are superb and will always hold a place in my heart.

Thank you for passing by, it’s always very much appreciated.

Pancake/Cookie lens

It’s a colloquial term for a flat thin lens assembly that started to emerge from the 60s through to the 80’s, commonly seen in compact SLR cameras of the time. This then developed into a body cap lens, an extreme type of pancake lens that is designed to both protect the camera internals as a body cap normally would, yet still allow the user to take photos. These lenses are manual focus only and generally have no more than a couple of optical lens elements, no image correcting elements, a very-slow fixed aperture, an extremely thin focusing ring (if any at all), and a retractable lens element cover. Due to this compromise in design, body-cap lenses generally suffer from numerous image quality issues such as heavy vignetting and poor image sharpness.

Recently there has been a resurgence in this type of lens culminating in the one that seems extremely popular at this time, a cookie lens.

Cookie lens

It’s not hard to see why it is named so, it looks like a big Oreo cookie, it even looks as if it has the cream between the two biscuit pieces. These current ones are sold as being recycled from old disposable cameras. Original pancake lenses can cost many hundreds of pounds, however these ones are classed as disposable, and are priced at around £30 to £40GBP, being sold by a company called Retropia. But hold it! Don’t waste your money on that one, as they can be purchased for at least half that price from Ali Express of Temu, just make sure you shop around. By looking at the reviews £30 can still be a bit of a hefty outlay for what is basically a cheapo lens out of a disposable camera set in a cookie shaped piece of plastic.

One guys in depth review of the “Cookie” lens

These lenses have risen in popularity, as the new mirror less cameras have become more accessible. This lens allows these cameras to be used as a straight forward point and shoot camera, no focussing or metering. achieving that retro disposable camera look, but in much more modern equipment. It’s a fun item and for an outlay of around £13GBP, which is what I paid for mine, it’s not too big an outlay to do some experimenting with, and if it turns out to be a load of old bilge, then it’s no real loss. Reviews are mixed, but in general it seems people are having fun, and that’s what photography should be.

I’m waiting for mine to arrive, and when it does I shall post some photos below to see how I’ve got on with it. Oh, and I now have a suitable camera to use with this lens and that can be found here Sony A7II Mirrorless camera.

The lens has arrived
Lens installed

It’s such a simple thing. It turns a complex camera into a quite basic point and shoot disposable, lomography type of camera. Perfect for street photography and just everyday randomness, yep kind of like you’d now find on your mobile phone. However this is more fun and you actually have a camera into your hand, Perfect.

The lens is 32mm, and the CCD in the camera is full 35mm so there is a kind of small vignette around the edges of each shot, but that just adds to the basic rawness of the lens. it’s a bit of fun.

Angles in the living room
Garden pub
Rusty chair
Across the kitchen early morning

Above are a small selection of some of the scenes around home, taken quite randomly and all I have done in the post process is added some vintage presets. The light has been so poor lately that to be honest this already added to the vintage effect. If we see any sun I suspect the results would be very similar to the hazy 70s effect that the disposables always managed to achieve. Don’t expect too much from these lenses, they are just fun to experiment with, and that’s just what photography should be. Fun.

Thanks for passing by. Always appreciated.

Olympus Trip 35

What the listing stated:

This lot is being sold for PARTS / REPAIRS, it is currently NOT in a working condition

Olympus Trip 35 w/ D. Zuiko 40mm F/2.8 Lens
& Original Lens Cap

EBay

Olympus trip 35

I brought this item along with a Canon A1 as a job lot. The full detail of what was in the auction and how it progressed can be found here: Not the lottery, but for me – just as good

The page regarding the repair of the A1 can be found here: (Still in draft – coming soon)

Meanwhile here is a little history about the Olympus trip:

The Olympus Trip 35 is a 35mmcompact camera, manufactured by Olympus. It was introduced in 1967 and discontinued, after a lengthy production run, in 1984. The Trip name is a reference to its intended market—people who wanted a compact, functional camera for holidays. During the 1970s, it was the subject of an advertising campaign that featured popular British photographer David Bailey. Over ten million units were sold.

The Trip 35 was a point and shoot model with a 40 mm ƒ/2.8 lens, solar-powered selenium light meter, and just two shutter speeds. In ‘A’ mode, the camera operates as a Program automatic, choosing either 1/40 s or 1/200 s. The camera could also sync with flash, and has a range of aperture settings, from ƒ/2.8 to ƒ/22. In flash sync mode, the shutter is set at 1/40 s. Apart from a simple four-position zone focus system, and an ISO setting from 25 to 400,[2]the camera has no other photographic controls. The camera has a Prontor-Compur sync connector and a hot shoe. Its lens was a coated Zuiko 40 mm ƒ/2.8, with four elements in three groups.

The camera has an ISO range of 25–400, as films faster than 400 were uncommon at the time and delivered reduced image quality. 25 speed allowed the use of Kodachrome, while 400 speed allowed use of Kodak Tri-X and similar fast materials under low light. Earlier models, from the first few years of production, have a maximum ISO speed of 200.

The use of a selenium photocell to select the shutter speeds and aperture let novices use the camera as a “point & shoot”. No batteries are needed to power the camera.

The lack of more than two shutter speeds was not a problem. At 1/200 s and ƒ/22 with 400-speed film, the camera could deliver correct exposure in full sunlight, while at 1/40 s and ƒ/2.8, correct exposure could be obtained under bright fluorescent light, without a flash.

Wikipedia

And who could ever forget the series of star studded television adverts, featuring the photographer David Bailey, put together to promote this camera.

David Bailey

I never really got to use one, I admired one from a distance instead. My brother in law, Jim had one around about the mid to late 70s and he took some fantastic snaps with it. I wasn’t into photography at that time as I was still more interested in LEGO and Tonka trucks. However he did let me try it a couple of times, it really was that easy to use.

I’m not really sure what the problem is with this one, as the listing was not really clear on its issues. I just really wish sellers would just take a few seconds to describe the problems, it really could be an instant decision for the buyer – is it repairable or not? I’ll just have to wait until it’s arrived, and then i can do an assessment of its condition.

Assessment:

Well, it’s arrived and cosmetically it looks fine. However, zoom in a tad and the issues become apparent. It’s been dropped at some time, the lens has a little bit of wobble and you can see the outer ring of the lens has an obvious dent in it.

Drop damage

It does wind so that’s a bonus. The exposure button works and it clicks as it should, and the old selenium exposure meter appears to be responding, the red flag appears in low light and thus the exposure button will not depress. This is good.

Exposure indicator in viewfinder

When you half press the exposure button you would expect to see the relevant shutter leaf aperture close down, to the corresponding f- stop reading, this occasionally happens. If you move the lens barrel slightly it does have an effect, but it looks as if there is also some contamination on one of the shutter leafs, all of this is probably as a result of that tumble that has occurred sometime in the past.

Obvious lens wobble

I will definitely have to remove the whole lens housing from the camera to see if I can do anything regarding that wobble. This is going to be quite some task, and I’m not confident I will succeed, but who knows.

Let’s attempt to get inside.

Repair:

To get into the lens there are three tiny screws on the inner turret bezel that have to be removed that sit around the edge of it. This then pulls out and the lens optics can then be unscrewed.

Here are then two more screws that allow you to remove the selenium light sensor. Below this are three brass screws that hold the body to the lens. One of these screws were loose, hence the wobbly lens, this must have occurred when it was dropped.

Removing the sensor
The three brass body screws

I’ve pretty much had a cleanup here, applied a tiny drop of camera grease to the ring mechanisms, and tightened all these screws, and now the turret is nice and tight. I’ve just given the shutter blades a wipe with a soft brush and that is all it really needs. I’ve reassessed the camera, and tested its operation and it’s all good, working just as expected.

Result:

The dent in the ring remains as it’s causing no issues and is a subtle reminder of its past. The lens issue and its movement has been repaired and this in turn has cured the issue with the sticky aperture blades.

I haven’t touched the inner workings in the top of the camera such as the light metering, as it’s working fine and what’s the point in fixing what’s not damaged?

All repaired and looking good

I’ve still to run a film through it, and this will be done shortly as I have quite a backlog of film cameras to be tested. As soon as I have photos available I will link through this posting.

Really pleased with how this has gone, a nice easy fix but I can’t believe just how small those screws are around the lens bezel. I need my eyes testing that’s for sure.

Thanks for passing by, as always it’s very much appreciated.

Mamiya M Autofocus – 35mm point and shoot camera – Part two

Here we are again. I recently wrote of my failed attempt to get this 80s camera operating here: Mamiya M Autofocus – 35mm point and shoot camera.

Not one to give up on a project I have looked at a suitable donor camera and believe I have found one as detailed below. Only difference is that I had to buy two cameras as they came as a bundle. Not a problem as I can always do a separate post on the other one, the two have cost me a total of £15:00GBP bartered down from the original price of £30:00GBP. A bargain! So let’s just call it £7:50GBP per camera.

What the listing stated:

mamiya shutter button is stuck. red light on the right comes on. some external corrosion pictured

ricoh no power at all

EBay

The two cameras

Assessment:

The Mamiya is in quite a poor state, and is the Time Memory version that differs very slightly from the version I originally worked on, it’s essentially the same camera as the Mamiya M, but with an added quartz dating mechanism for imprinting time and date information on the film. This model was the last 35mm camera Mamiya produced before focusing solely on medium format. However the back seems to be a bit rusty whereas mine is in excellent condition, so I will be using a mix of the two units to make the one good one.

Repair:

The Mamiya looks good cosmetically until you open the rear and see the rust around the door, not a problem as I won’t be using this part of the camera. The red light does not come on at all and the shutter button is stuck, that’s for sure. The whole camera is dead.

Let’s get into it.

Once opened all looks ok so I decide to have a search around with the multimeter checking the basic operation. Am I getting 3 volts at the top of the battery barrel? No I’m not. It appears that one of the traces on the positive side of the power input board has lost continuity. For some reason the traces has been damaged, this could be either from corrosion or rubbing on something. The area affected is in the photo with the red ring around it.

The board top right
Area of no continuity

I’ve fixed this immediately using some solder to bridge the gap, I have checked continuity and all seems ok. I put some batteries in and the motor squeals like a banshee and then stops. You can hear the screaming motor below in the short video from its first screaming session through to its proper 80s sounding drone.

The screaming motor through to its repair

I don’t think this motor has run for years and it does not run consistently. I have sprayed it with some contact cleaner and let it soak. I have left it overnight and checked the operation in the morning and it seems to have improved.

I’ve used the original fascia, rear door, focussing beam and flash capacitor from the first failed unit, and apart from a few bits of soldering, plenty of contact cleaner and some silicone grease, I’ve revitalised a failing motor and it is now working as it should. I forgot to mention I used some graphite on the shutter leafs to “lubricate” them. All optics cleaned and camera has been tested without film and is working just fine.

View finder indications are good with light meter operational, motor rewind works, flash and exposure is fine, and the motor advances as well.

Result:

I’m really pleased with this little camera and am pleased I didn’t give up on it. It’s taken two broken cameras to make one good one, and I have a good few spare parts left over to be used at a later date.

Re assembly taking place

The unit looks so smart, the only real issue is the battery door that is notoriously flimsy and lots of references to its poor design can be found on line. A temporary way around this is just to put some tape across it to keep it closed.

That flimsy battery door

Beyond that issue, the camera is a really good looking unit that has cleaned up really well.

The completed camera

I can’t wait to run some film through it to see how it performs. I have a few cameras like this to test so I’m looking for some decent priced film to use, as i do need quite a bit.

As soon as I have some photographs availability I will link to this post accordingly.

Many thanks for following the repair, it’s always very much appreciated.

Not the lottery, but for me – just as good

I’ve been after a couple of cameras for quite a while now that hold a great deal of sentimental meaning to me. This will become apparent when i publish the individual posts for them, but for now i just want to share the result of an auction i participated in on the 31st July 2025.

A Canon A1 and an Olympus trip

Today I’ve probably made the best purchase off of an auction site that I have ever made previous. I’ve been following a number of Canon A1s lately and they have all been going in the £120+GBP bracket, some even higher than that. Today I have lost out on two that sold for £93 for a damaged body and one for £121 that was just a body but of a much better quality. This particular auction I was watching was for an untested duo of cameras, a Canon A1 as well as an Olympus Trip 35mm. The Olympus alone normally commands the high £80GBP range and both of these were in this particular auction. I was just watching as this was going to sky rocket in my opinion, two good cameras from a respected seller who I have used before. Two minutes from the auction end, bidding was sat at £39GBP and I thought that any second now the price was going to go crazy, especially in the last 30 seconds. I put in a max bid of £55GBP for the lot, as I pretty much knew it would sail past that amount and go for a price in the £150-£200 price range. I hit the bid button with 20 seconds left on the auction….

You have won – congratulations!

I thought you’re having a laugh, no way. And then it came up with the winning bid being £39:00GBP no one else was bidding, crazy.

The A1 camera consists of the body, a winder, an FD 50 1:1.8 lens, a camera manual as well as a lens manual.

Postage was the grand total of £4:99 so my total for these two cameras was £43:99GBP. That is nuts, and to say I’m pleased about this is the understatement of the century. I have two of the cameras I wish for the most, and I have just landed the bargain of the day, I was in the right place at the right time. Wow. It’s unusual to catch other auction bidders sleeping, it will probably never happen again for me, it’s a very rare occurrence. Two cameras of this magnitude for £22:00GBP each! That’s unheard of.

I don’t know for what reason they are not working, as they both appear to be quite tidy examples. I have used this seller before and the posting above could also be worded such as to imply that the units may well not have been tested. But, that’s what this site is about, repairing old cameras and getting them working again. There’s no fun in talking about a good functional camera, that’s boring. We want the meat and potatoes as they say, we want to see things being fixed, or broken further….you never know with me.

Thanks for sharing my excitement at this purchase. It will all make sense once i’ve assessed the cameras and carried out any repairs.

Thank you for passing by. It’s always appreciated.

Sticky, Rubber camera grips

Anyone who has had an 80s/90s/00s camera through their hands would have experienced this at some point. During this time period many if not all camera manufacturers went through the phase of putting rubber hand grips on their cameras. Aesthetically pleasing, and ensuring a good grip of your new “Expensive” toy. I guess, they thought they had got it right. But as with all these good ideas they often come back and bite you right on the bum at a later date.

My particularly sticky Nikon D70

Ok there were probably no recalls regarding this issue, it’s just affected the price of these goods on the second hand after market, and more than likely a perfectly good unit has most probably gone to landfill for no other reason than “Feeling sticky”

Let’s look into the reasons why this occurs.

It’s pretty much down to a process called Vulcanisation. Vulcanisation is a chemical process that hardens rubber by cross-linking polymer chains, making it more durable and elastic. This process, often using sulfur, heat, and other additives, transforms natural or synthetic rubber into a material with improved properties like resistance to heat, cold, and deformation. 

However after many years, the process begins to break down, this causes the rubber to become sticky and in some cases the rubber just breaks down causing traces of rubber dust all over the place. Add to that the normal oils from fingers and palms and the stickiness then becomes highly noticeable, and makes for a very unpleasant experience.

We can’t stop the progress of the degradation, we can however do something about the sticky state, maintain good quality and make the use of the item as pleasurable an experience, just as it was when first purchased. Many believe the stickiness is down to the way the item is stored, and it not being used on a regular basis, as there is plenty of evidence out there of similar aged cameras not suffering from the issue at all, as they are used daily, namely by professional types where these cameras are tools of their trade.

It involves some work, and patience. I am writing this post as I have 8 cameras that i am currently working on, all Nikon D70/D70S and they all have this problem, and they date from 2004.

A load of very sticky Nikons

I use a process that you will easily find on line, the most simple process and it involves using a substance called Isopropyl Alcohol, my one is 99% pure, (also known as rubbing alcohol) I don’t think the purity of 99% is essential but i use it as i have plenty of it around, what with all the circuit board work i do, and the cleaning they also require.

Some people have had results just using a dry cloth and no chemicals, patiently rubbing and rubbing, some for a few hours at a time, until all the mess is removed. If that’s the way you wish to go then fine, i haven’t got the time for all that, i’ll be talking you through the way i do it below, with a chemical.

My technique is simple, lint free cloth and some cotton buds are all that i use, along with a tissue wipe (Such as armoral, or a car cockpit cleaner solution with a dry cloth) and a cocktail stick to finish. The reason for the wipe will become clear at the end.

My Guinea pig for today is a Nikon D70 I have requiring repair. It is a particularly “Sticky” individual and will be a good candidate on how to deal with this sticky situation. This is the process I use on all my equipment that has rubber such as this as part of its structure. It’s worked for me for many years, some people say that it will need doing again after a short while, that’s never been the case for me, and there are a number of documented cases on line where six years after this treatment has been done, there is no repeat of the initial problem. The rubber remains good.

Using a small amount of IPA on a lint free cloth gently wipe the area of concern and you will see the stickiness start to lift, it looks like a glue.

A glue type deposit
Gently wipe
The dirt is soon lifted

Make your way around the whole camera paying particular attention to those really sticky areas. The IPA evaporates really quickly so you get to see results really quickly. If after one try the stickiness remains then try another application. A good indicator is that when you use a fresh part of the cloth, you see less dirt come off with each application. When you put an application on and come away with a clean cloth, your job is done.

The cotton buds for the corners
Second application
The dirty cloth and cotton buds

The cotton buds are used for getting into those inaccessible crevices you can’t get into with the cloth. As before as they stay cleaner and pick up less dirt your work is done. All this cleaning and moving about of dirt sometimes transfers the dirt into creases and joins between the rubber and the camera body, this is what the cocktail stick is for, to get into those small gaps and scoop the dirt and debris out. Complete with a final application of IPA in this area and the dirty work is now done.

Now earlier I mentioned about using Amorall wipes or a car cockpit cleaner. Sometimes this process can dull rubber, as you have just removed the layer that was providing the gleaming glory back in the day. You can’t have it all your own way but a good quality interior dashboard cockpit cleaner really does add some shine and life to that old camera and really does do a good job of restoring it. I use Auto Glym interior shampoo on a lint free cloth and apply this by gently applying all over the exterior of the camera. It is now exceptionally clean. A quick rub over with a dry cloth once this is dried and what more can I say? This is a different camera, looks stunning and has lost all trace of stickiness and dirt. Now it has that extra layer of protection as well, it’s now a pleasure to behold.

The finishing touch.

This little task probably took just over 20 minutes to achieve and gives so much satisfaction to me as you can see a cameras appearance change in front of your very eyes, and anyone can do it. No camera deserves to go to landfill just because it has this sticky exterior, it’s simple to do and can revitalise an old and much loved camera.

The finished item – stickiness now a thing of the past

I hope this has helped with dealing with the stickiness issue, if you ever experience it. I have even heard reports that a good quality window cleaner can also give similar results, but I’ve never tried it, so there really is no excuse if you have a camera in your ownership needing similar attention.

Many thanks for passing by. You legend👍

Mamiya M Autofocus – 35mm point and shoot camera

What the listing stated:

Mamiya M point and shoot camera. It’s in fantastic original condition and is cosmetically excellent with original case and lens cap included. The lens appears to be bright and clear from the front. 
HOWEVER…when batteries are inserted the shutter does not fire and I suspect it is jammed somewhere. The lights come on and it goes “click” but the aperture does not open, nor does the film winding do anything. 
For spares or repairs only, I’m sure somebody with the know how could get it up and running again. 
Priced super low as I want it shifted and can’t bring myself to bin it! 
No returns please

EBay

A well made 80s point and shoot 35mm camera

Here’s a little bit about it:

The Mamiya M is a 35mm autofocus compact from 1982.  It has a boxy plastic shape, with a fixed Mamiya Sekor 38mm f/2.8 lens.  The lens is four elements in three groups.  Exposure is fully automatic, based on the film speed, where the ISO is selected via a dial around the lens. Film speed available is 25 – 800 ISO.  

The metering cell is located just under the lens, but within the lens ring.  This allows for the metering to take into account any 46mm filter screwed onto the lens.  That is assuming it is not a graduated filter.  Fastest shutter speed is 1/500thsecond with the slowest at 1/8th.  The camera is always on, except when fitted with a specially designed lens cap, which triggers the off state.  There is a strategically placed switch it pushes against on the right side of the lens.  Most of these caps are lost, including mine.

Photothinking.com

I don’t know what attracted me to this camera, but the fact the seller just wanted rid of it at a cheap price was a starting point. It was advertised as £4:36 GBP and £2:45 delivery, a total of £6:81GBP. I bartered a bit and got it all in for £5:44GBP so I got it a little bit cheaper, a bargain if you like.

Mamiya has a great reputation for building high quality lenses. They were only in the 35mm autofocus point and shoot sector for a short while before immersing themselves totally into the medium format camera market. This 35mm camera was only in production for about a year or so, even though quite a few were produced, we are looking at the low hundreds of thousands, not the many millions, so the camera itself was not a major mass produced and marketed unit. It is a plastic preformed body unit. Known in polite society back in the day as “A plastic fantastic”.

If a Mamiya camera had a blue ring around the lens, specifically on its other models, it denoted a higher quality lens type, it was never confirmed this was the case with these small autofocus 35mm cameras, though many believe it is still the case. Photo quality with these little units was generally of a very high quality.

Lens caps with these cameras are very rare, this one has one and it is the original, and i suspect (from what I see in the picture) that there may be a small crack on the side of this one, but that is not an issue. This lens cap is integral to this cameras operation, as when it is placed over the lens, it turns off the camera, without it the camera remains live at all times, and would soon lose its power. It is an early power conserving device if you like. The camera looks to be in overall good condition, probably down to being stored in its original case.

You can view a lot more than I could ever tell you, just by watching this review by Mr.50mm that was posted earlier this year.

Excellent recent review

Since reading up a little on these cameras it appears that I may well have bagged a bargain, if it ever works. And I also believe the seller may well again be unaware of the operation of this camera and it may in fact be working just fine? Who knows? I have my suspicions but we will just have to wait until it gets here for assessment.

Below are some sale prices relative to this camera model that are currently selling on EBay, some extremely high prices compared to what I have paid today:

Current selling prices for this model

It’s plastic and so 80’s. And people obviously loved it. I’d like to be able to get this camera working again, and would love to run a roll of film through it to give it a test run. But first I have to assess it and see just what is wrong with it. I have a roll of old film available to test its “faulty” rewind system, and I have all my tools ready to crack it open and get inside, if I have to. So let’s get at it….

Assessment:

It’s arrived and I must say it is in an excellent cosmetic condition, probably down to being kept in its original Mamiya soft case. The lens cap I thought had a crack in, is actually broken, probably beyond reasonable repair, but at the moment that is not important. Let’s put that to one side for now.

Nice condition
Lens cover damage

The actual camera is partially alive. When batteries are installed there is a red light that appears on the right rear side of the camera, this is the film transport light and should extinguish when transport is complete. The flash switch sticks a little, and when the flash is clicked into position the distance sensor light on the lens activates however the flash does not charge. The winding system is inoperative and does not auto wind at all. The shutter does not operate, despite the shutter leaves being able to move when gently coaxed.

Shutter not firing
Transport light in top right corner
Focus light illuminates on front

There seems to be partial electricity throughout, this could very well be the issue. There just doesn’t seem to be a uniform continuity throughout the camera. This will need to be looked at. Something very weird is going on inside.

Repair:

I’m really annoyed, closer inspection shows there are 6 screws missing and someone has been inside this camera prior to me. Again I think I’ve been stung by the EBay curse of “Spares and repairs- no returns” will I ever learn?

I’ve removed the remaining screws, and had to peel off the rubber grip to access and expose the motor and associated component board in this area. There will need to be a lot of cleaning here before gluing it all back in place.

That glue
Motor exposed
The grip gently peeled away

I’ve managed to get the flash charging light illuminated, and a current of 214v in the flash confirms that the Flash capacitor is holding a charge and more importantly, receiving a charge from the battery circuit. But I cannot get it to fire. There seems to be an issue with the shutter mechanism and the related electrical circuit in this area. The motor is not working, it’s either dead or not receiving power. I need to look in this area a little more thoroughly.

Front fascia removed

I’ve now removed the front fascia and now have a good view of the overall workings inside the camera.

Flash circuit board- tested ok
Lens and leaf shutter removed

Ive taken out the lens and the leaf shutter, these seem ok and are working freely when operated. To me it looks as if the mechanism that triggers the leaf shutter is either seized or the variable capacitance system located at the top of the camera, that is basically just a needle on a circuit board connected to the focus light, could be at fault, it does not freely move on each camera actuation as it should, and this is not a readily available part.

That faulty part of the board
Misfiring- faulty

It seems the deeper I delve into this camera that I am finding more issues, and I’ve just found two parts that are incorrectly installed that are on a cog system connected to the motor. I’m fighting a losing battle as it appears the person who has been here before has probably added to the issues of this camera in their attempt to fix the original issue.

On top of the missing screws I’ve now found a missing capstan cog related to the leaf mechanism that would help explain a certain lack of movement in areas. The motor is dead, I’ve taken it out and used the bench power supply and it is non responsive. Even after spraying with some contact cleaning fluid and sitting there spinning the axis to get the solution absorbed, there is still no response. It’s totally dead and will require replacement.

Result:

Well. Once again I have been mislead by incorrect descriptions on the auction sites. It’s a shame really as this is a lovely camera and if it had not been tampered with inside, I’d probably be posting a different review today, one that would be more positive. With screws, cams and cogs missing I was pretty much set up to fail here.

Reassembled
Back in its case

I’ve reassembled the camera and it is now back in its pouch. The positives are that I have learned a lot about how this camera operates, and just dismantling and reassembling the camera allows you to learn a lot about it, and the technology used during that period in time. All the screws that I removed have gone back into place with none leftover, yet another positive.

So it’s a failure I’m afraid, but it will be kept and either used as spares or I will obtain a suitable donor to get this one up and running, it will not be disposed of in any way. It will be reused. I’ve only paid a small amount for this, it’s worth it for the spares alone.

I have already set up a notification on the auction sites for when another suitable camera becomes available. I will update this post or post a new one that incorporates either the repair of this unit or its use as a spare parts donor, when that time comes.

Thanks for passing by. Its appreciated.

Fujifilm Finepix S2 Pro

What the listing stated:

ALL ITEMS IN THIS LISTING ARE FAULTY 
FAULTS MAY VARY BETWEENS ITEMS

SOLD AS IS 

NO RETURNS

EBay

The Finepix S2 Pro

I’ve purchased three cameras as a job lot in an auction. All of them have issues but the issues have not been clarified. This is very much a “Suck it and see” auction where I get what I’m given. I’ve paid £24:22GBP for all three and that includes free postage. I’ve purchased from this seller before who is a bonafide Camera business based in South Wales. He has no time for faulty items though, quick in and out is his way of working, no time to fix stuff. I’ve got three good cameras in this bundle and this works out at just about £8:00GBP per camera. And where can you get cameras like this for those prices nowadays.

I’ve just read a blog where a guy had one of these cameras from new, and in 2002 he had paid £1550.00GBP for this camera. Wow, and here i am 23 years later paying the grand total of £8:00GBP for one. Even if I don’t get it working, I’m happy with that.

Now this particular camera had two issues in its lifetime that caused concern, and one of them meant it was pretty much game over, and that one was the CCD issue that used to plague this range of cameras. Fuji released a whole bunch of these cameras with a faulty CCD that had to be fixed under a recall. They built sufficient replacement CCDs to cover the recall and that was about it. There were no remaining CCDs left and at that point what was left had become as rare as hens teeth. If you suddenly developed that faulty a later date, then tough…you were stuffed.

Serial numbers affecting CCD problems are listed below:

Model Serial Number Range 

FinePix S2 Pro 31A127**~31A143** 

32A000**~32A039** 

33A000**~33A007** 

34A000**~34A004**

Fujifilm

The second issue was with a batch of these models that had a “bad” resistor in the power circuit that prevented lock up if there was a power spike, if this failed then the camera just stopped and you were stuck. There was another recall on the second issue but there is probably a lot of cameras out there that again weren’t part of this recall. And I guess owners were pretty fed up of recalls at this point and were off loading their equipment as quick as they could.

The serial numbers regarding the lock up problem are listed below:

Between serial numbers 24L00441 and 24L00680
Between serial numbers 24L01057 and 24L01256
Between serial numbers 24L01553 and 24L01863
Between serial numbers 24L10257 and 24L10608

Fujifilm

My camera serial number

Above you can see the serial number for my camera. Thankfully my number falls outside the range of any of the cameras inflicted with either problem, so it’s fair to say (Fingers crossed 🤞) that I shouldn’t suffer with any of the known issues with this unit. In layman’s terms I think i may well have dodged a bullet here.

I did speak to the seller regarding the fault on this camera and he stated it was just a general error code on the top screen. There is a general error that arises occasionally regarding certain lenses where they have to be locked on their minimum aperture for the camera to work properly, however I’ve not attached a lens yet so this cannot be confirmed.

Here’s some history:

The Fujifilm FinePix S2 Pro is an interchangeable lens digital single-lens reflex camera introduced in January 2002. It is based on a Nikon F80 (N80 in the U.S.) film camera body that was modified by Fujifilm to include its own proprietary image sensor and electronics. Because of the Nikon body, it has a Nikon AF lens mount and so can use most lenses made for Nikon 35 mm cameras. It is autofocusing, with an electronically controlled focal plane shutter with speeds from 30 sec. to 1/4000 sec., built-in exposure metering and pop-up flash. Its ISO film speed equivalents range from 100 – 1600. The S2 Pro also has sound recording capability. The camera is no longer in production, having been superseded by the Fujifilm FinePix S3 Pro in February 2004.

Aside from the Nikon lens mount, the camera’s principal distinction is its 6.17 megapixel photo sensor. Known as the Super CCD, it is unique in having its photodiodes oriented diagonally rather than horizontally and vertically as in all other DSLR cameras. This allows the use of a sophisticated interpolation system that produces an output image equivalent to 12.1 megapixels. The apparent resolution of images in this interpolated mode lies somewhere between 6.17 megapixels and the 12.1 megapixel interpolated output.

A huge number of these cameras were built using a Sony sourced defective CCD that was subject to a recall by Fuji. The recall ended when the stock of these replacement CCD’s was depleted. There is word that no other stockpiles exist of this Super HAD CCD, making these cameras that are found with the purple or black tinted image problems extinct, only usable for parts. The Fuji F700 used a similar defective HAD CCD, but in 3.1/6.2Mp size. That camera has met a similar fate.

Wikipedia

So let’s hope that we can get some pictures out of this unit. We just have to wait and see what arrives.

Assessment:

Well the camera has now arrived, and I must say it is in an absolutely beautiful condition. Cosmetically there isn’t a scrape or scratch, all screens are scuff free and it looks as if this unit has been well cared for. It just needs a wipe over to clean. The package is just the camera body with no extras such as a body aperture cover or neck strap, but who’s worried about that, they can be procured at a later date.

Front view
Rear view
Flash open
Nikon type F mount

These units are quite power hungry requiring a total of six batteries. 4 AA cells go in the base and two Lithium CR123A batteries go in the grip. These batteries work in unison, one set handling the basic camera functions whilst the other deals with the capture and processing of images. It’s a strange affair, loosely based around the same setup that was originally on their film based camera counterparts.

AA batteries
CR123A batteries

I’ve had to order the lithium batteries, however I can still get displays and Information using just the AA batteries in the base, basically it is semi functional in this situation.

The lens mount is a standard Nikon F mount, I’m going to have to search through my equipment to see if I have such a lens, I suspect I don’t, so I may well have to purchase a small lens purely for test purposes. I have some other Nikon repairs in the queue, so a lens to have for test purposes wouldn’t really go amiss.

The unit takes either a CF card type II or a Smart-media card (Max size of 2Gb on both) that is located behind a hinged section on the rear of the camera, these work fine and have no bent pins.

Media card ports at the rear

With batteries in place I get the full range of menus, and nothing comes across as suspect at all at this stage in the assessment.

The top menu – no lens attached to test

The top menu by the exposure button is the only “F” indication showing, I have no lens attached so this might be the reasoning for that, but if I do put the menu into manual mode I get the full range of shutter speeds and can even operate the shutter, the shutter seems to be working at all selected speeds with no issues as far as I can see.

Some of the shutter speeds available in manual mode

All other menus are available and I’m even able to format the CF card via the cameras menu. The picture you see on the screen was taken on another camera. It wiped fine so no issues here.

Various menus and the screen after a format was completed through the cameras menu controls

The camera seems to be working with no apparent communication issues as yet. When you try to use the flash it even informs you that you need to insert the correct batteries to test. As I’m awaiting the CR123A batteries I won’t be able to test the flash functionality until they arrive.

No CR123A batteries installed? – You can’t use the flash

As I have stated the testing can only go so far until I have the missing items in my possession, for me that is the two missing batteries and a suitable lens. I’m currently in the process of procuring both. Physically there is nothing wrong with this camera after spending a good couple of hours going over it. I’m quite comfortable with it and believe it could be a lens communication error or just a failure to read the instructions properly by the previous owner. All I need now is that lens. I’ll let you know what occurs in the repair section.

Repair:

To be quite honest it’s not really been a repair, it’s been more of a “pre flight check” to collar a phrase, going through all of the cameras capabilities and ensuring that they are all functioning correctly. As the camera was listed as faulty, and the fault was not identified, I have had to do many hours of testing and Investigation to get to this point.

I’ve done a bit of shopping and managed to buy a nice little lens from the Southern hospice group. Always happy to help a charity and secured this at a good price of £15:50GBP, and that includes the postage, for a Sigma 28-200 f/3.8-5.6 Ø72 Zoom Lens Nikon F Mount. There looks like a bit of fungus on the outermost optic, however I can always clean this if it’s too bad. If not I’ll just leave as is for the moment and keep it vacuum bagged between uses, I can always do a separate post on cleaning up fungus in a lens at a later date. (I have done a basic fungus clean in the past : Canon EF lens 35-80mm)

My new – old test lens

I wasn’t looking at spending too much here, as I only wanted a lens to test a number of Nikon repairs I have upcoming as well as this S2 Pro. This lens will fit that role perfectly, and be added to my collection of other lenses that I have that allows me to test a range of different camera products. I have also purchased an “F” mount body cover for the camera to protect the unit when there isn’t a lens attached to it.

The two CR123A batteries have arrived and have been placed in the handle grip. The warning that was there before the batteries were installed (see picture above) has disappeared and when placed in manual mode the flash fires just perfectly, no issues here.

The Lens has arrived. Good point is that it fits fine and looks good, and all electrical contacts are good. Bad point is it has severe fungus throughout, and is just like looking through a fog.

Severe fungus in the lens

I will do a separate post on cleaning this problem up in a later post. However I’m not overly worried at this point, I paid a very low price so it was to be expected, I’m not complaining to the seller who was a Hospice, they need the money and I can fix it so there really is no problem.

That lovely looking lens hides a problem

The excellent news is that the lens does exactly what it should. The camera indications are good, all working exactly as expected . However the pictures via the screen are extremely hazy due to the fungus infection on the lens. There are no black or purple casts on the pictures so I am quite happy that we haven’t inherited the dreaded CCD issue discussed earlier in this post.

Hazy days – Lens fungus

If I use the lens wide open and pop the camera into auto mode I do get an “ERR33” code and that is a communication issue between the lens and the camera. As I have stated earlier in this post, you have to have the lens set at its lowest aperture and locked for the error code to go. Fortunately this lens allows you to lock the aperture and once this is done the camera takes over the exposure when it is working in automatic mode. So as I also stated earlier, it appears the seller was probably not aware of this requirement/issue.

Result:

We have a fantastic working camera, it does all it was produced to do, it has its little quirks and oddities, but being familiar with these cameras and at least having some knowledge and awareness of how they operate is always a wise thing. Read the instructions and don’t just throw them in the drawer until you eventually sell the camera on as a damaged item, when in fact you were just lacking the knowledge on how it operates in the first place. Instruction manuals are good, they serve a purpose. Knowledge is king.

The complete camera with lens

This camera cost me £8:00GBP. That is a superb price for a camera of this quality even though it is now 23 years old. It has a lot of life left in it, and I can’t wait to get it out and give it a real test.

It’s a little beauty – And the lens that needs attention

So in theory I’m confident and happy that this camera is now in a fully operational order, it’s needed a clean, it’s needed a lot of research to find out how it works, and I’ve also downloaded the operating instructions and repair pack should they be required.

It’s taking pictures and storing them. It’s just the lens at the moment isn’t performing at its best due to its fungus on the optics issue. I’m keeping the pictures stored on the card to compare them with the new pictures that will be taken once I have another lens to use.

Once the lens clean up is complete, if I ever get around to it, I will link it through this post.

Edit:

As 12/7/25 I have purchased a newer higher quality lens without any of the above issues to be able to get some instantaneous results, and as I have about seven other Nikon cameras requiring testing, some with sensor issues, it was wise to invest in a better quality lens. I have purchased a Nikon 28-100mm AF Zoom Nikkor Lens G AF-d, in perfect condition and the post regarding it can be found here: Nikon 28-100mm AF Zoom Nikkor Lens G AF-D

A newer – old lens, much superior quality

As previously stated I will add photos in this post once the new lens arrives, to show the difference from the fungus infected lens to a decent lens. The old lens is still a work in progress and I will post about it again as a separate post once the clean up is complete. It will probably be a job completed once the long winter nights are back in situ.

Below are comparison photos between the old lens with fungal issues and this new lens:

It’s just typical for me to manage to make another post from an issue that has arisen from fixing a different item. But isn’t that life? Continuous improvement is a factor we come across on an almost daily basis, and if you deal with old items as much as I do, then there is always something else that needs repairing, something that requires your attention and I just love that. The ability to improve or make something better, gives such a feeling of achievement and accomplishment, and total satisfaction. And that’s why I write this drivel. It’s for me, it’s what this blog was originally set up for. It’s my journal of what I do.

Many thanks for following this post. You know it is always very much appreciated.

Sinclair Cambridge Memory Calculator

What the listing stated:

This auction is for a used cased Sinclair Cambridge Memory pocket calculator and original case. The item is in very good cosmetic condition as is the case which still has its instruction sheet. The item is powered with 4 x AAA batteries (not supplied) and does work although 1 of the digits is faulty and does not display (see pictures) plus the number 5 digit is not working. Please refer to the pictures and description provided before bidding.

EBay

It’s faulty…obviously

So it does work, but it doesn’t? This calculator is a model one memory calculator, that dates from around July 1973, ( Actually May 1975 see photos below) and is one of the earliest available mass produced electronic calculators available in the UK at the time. And it was produced in collaboration with a guy called (Sir) Clive Sinclair, who in the following decade would become synonymous with tech development in the UK. It retailed at £29:95GBP, and given the rate of inflation, its cost today in 2025 would be a staggering £463GBP. Wow!

Courtesy of Vintagecalculators.com

I love collecting old calculators, I couldn’t afford one back in the day when they arrived on the scene as I was only a child and probably only on about 20 pence a week pocket money, and savings and investments were not even known to me at this period of my life. The thought of saving that precious 20p a week for the next 150 weeks wouldn’t have even remotely crossed my mind. What no sweeties?

But I can buy them now, so no big issue!

So this one has become available, and I’ve been tracking it for a week or so, there were nine other people watching but I secured it for a total including postage of £14:49GBP, and I’m happy with that, it’s a piece of retro history for a very good price. Even if it remains faulty, or should I say working but not working?

This unit obviously has its problems, the button number 5 doesn’t work and one of the led digits is also not functioning. Hopefully I can get these issues sorted and soon have the calculator back up and working as it should. That would be nice. I’m looking forward to this little project.

Assessment:

It’s arrived and it’s a lot smaller than I anticipated. It has a separate hard protective case, which is a nice touch and a small info sheet on its operation. Cosmetically it’s in a good condition with just minor signs that are age related. There are no gouges or scars so it has been treated well, though it’s not pristine.

Two buttons unresponsive and one LED

Batteries go in ok but, I believe old style AAA batteries were a little wider than those used today and would sit a bit more snuggly in the battery compartment. As you can see there is a little wriggle room here, and springs at both ends need adjusting to help prevent this. I may have to use some spacers so the batteries sit tighter in place.

Gaps between batteries – means movement

The switch is a bit temperamental and can be seen quite plainly from the battery compartment. It looks strangely out of place with no batteries in place.

Switch off
Switch on

It is such a basic design solely relying on tension of a small metal plate to short across the connection points. Should be a simple enough issue to sort.

There is a little battery contamination on one of the battery contacts, again this shouldn’t be too much of an issue and should clean up ok with some IPA.

Some battery contamination

It was originally reported that there was one unresponsive button this being the number “5”, there is also another unresponsive button, the multiplication “X” button. There is also one LED indicator, the 4th one in from the left hand side that is not operating. Add to this the issue with the On/Off switch and the contamination, and the original faults reported in the original sales pitch have now doubled. I just wish people would spend more time going over the issues and then give actual accurate feedback as to what the real faults are, it would make for a far more pleasant buying experience. Rant over.

There doesn’t seem to be a single screw holding the body together, I just hope it isn’t all heat welded.

Let’s try to get inside.

Repair:

Well it cracked open quite nicely with no issues with just a plastic flat prise tool. The main board just sat comfortably in the unit, secure, and not a screw in sight. Strange as time moves on some of the games units I come across have best part of fifty of the little blighters to remove before you get anywhere. sometimes the old way is good.

Bare board
Opposite side of board
Date is May 1975

The dismantling of the keyboard is a little complex and you have to take time and make sure you know how it’s going to go back together, it’s just a bit fiddly. The board is quite straightforward and as soon as I see some of the IC’s it dates the unit perfectly. The chips are dated May 1975, and that is about 18 months younger than what I originally thought, it’s quite informative to get inside and learn occasionally and this is just as good as having a birth certificate presented to you. All good stuff.

I’ve proved that there isn’t a problem with the missing digit on the display as using my multimeter in diode mode I am able to prove that this LED is working fine.

LED working

The picture shows just one part of the display range on this particular digit, I can assure you all other sections of the display are also working.

Regarding the case with the buttons not working. I have checked this out for continuity and both digits go through the same portion of the main IC and there doesn’t appear to be any broken traces. It’s a strange one but I have also found some really poor solder joints that are either cold joints or just poorly soldered from the start, there are a couple of resistors that need re soldering. It may be nothing at all, but it needs attention, a full reflow wouldn’t go amiss or take too much time.

Faulty resistor joint

I’ve reflowed the entire board due to there being a few cold solder joints.

Full reflow completed

On top of this I have taken off two old capacitors and tested them out of circuit, and both were out of their operable range of +/- 10%. As a result of this I have replaced the offending components with comparable new ones.

Old capacitors
New capacitors

Even with all these extra tasks being undertaken there is absolutely no change in the way it operates. Nothing has gotten worse, the faults that were originally there still remain. I have done some research on line and carried out some further tests and checked expected voltages, most are within range except one that appears to be less than its expected value. After testing everything on this board, every component I can only surmise that one of the three chips has failed, I suspect very much that this, the main chip, a CZL550 integrated circuit. Otherwise known as “Calculator on a chip” is the one that is at fault.

A CZL550 chip

To be quite honest these chips are fairly rare and command a price far in excess of what I paid for the original unit, and I don’t really want to do that. I think I’ll wait around to see if I can secure another faulty unit to complete this repair, so in the meantime, and until I can secure such a unit I will put this repair on hold.

Result:

Well, it’s not what I wanted but sometimes you just can’t win with some of these old projects. In no way am I walking away from it, it’s just that the parts are so difficult to get hold of that you really do have to just wait until a sufficiently faulty one comes up for sale. And that could be days, it could be weeks or months. So for now i admit defeat, but it will not be going to trash. It will remain in my ever expanding “To do” box, for me to pick up on at a later date. And when I am in a position to move this project on, I’ll pick it up in a continuation of this post.

Many thanks for passing by. It’s always appreciated.

MB – Simon

Remember this? Everyone had one around 1978 apart from me that is. Well, now I’ve got one, only 47 yrs late and it doesn’t work. But hey that’s what this site is all about, and that’s how I roll. Always late to the party, and even then you’ll probably find me in the kitchen 🥳

What the listing said:

Cosmetically in very good condition but does not work. Please see attached pictures to judge condition for yourself.

EBay

Another one with all battery covers! I’m shocked. And what’s that screwdriver there for?

The guy was after £17:00GBP and that included postage, but I put in a cheeky bid and managed to get it with postage for £9:80GBP. Anything under a tenner is good in my eyes.

Here’s some history:

Simon is an electronic game of short-term memory skill invented by Ralph H. Baer and Howard J. Morrison, working for toy design firm Marvin Glass and Associates, with software programming by Lenny Cope. The device creates a series of tones and lights and requires a user to repeat the sequence. If the user succeeds, the series becomes progressively longer and more complex. Once the user fails or the time limit runs out, the game is over. The original version was manufactured and distributed by Milton Bradley and later by Hasbro after it took over Milton Bradley. Much of the assembly language code was written by Charles Kapps, who taught computer science at Temple University and also wrote one of the first books on the theory of computer programming. Simon was launched in 1978 at Studio 54 in New York City and was an immediate success, becoming a pop culture symbol of the 1970s and 1980s.

Wikipedia

From what i can see in the pictures the item seems good, cosmetically. I may be able to see just a little contamination around the battery contacts but I can’t be sure. It worries me when i see a picture that shows a screwdriver alongside the item you are buying, it just screams at me that the seller has been in side and is not being truly honest about its issues. Let’s just wait until it arrives to do a full assessment. I’m genuinely excited about getting this working, as my age veers ever closer to the higher numbers. I need something to stimulate my mind, what’s left of it. 😂

Assessment:

The unit has arrived and on first impressions looks clean and tidy cosmetically. The pads are not very responsive and the battery contacts are seriously corroded. The unit is a power hungry beast, taking two ”D” cell 1.5v batteries and one PP9 9v battery. The unit does not work with its batteries in place, and i’m not surprised really, and to round it all off two screws are missing from the case, and one screw mount is broken. All four plastic springs that sit under the coloured pads are broken, and just to clarify someone has already been in here and it doesn’t bode well. My previous concerns of a screwdriver being in the original photos have been confirmed. It’s been tampered with.

Broken screw mounts and contamination
Bad contacts – contaminated
Pads unresponsive due to broken plastic spring mounts

The board is a typical of many circuit boards from this era that were produced for MB. I had a similar circuit board on this item here: MB – Computer Battleship

Top of board
Underneath the board
You can see the board structure that is typical for this era. The contact points are indicated by the red arrow marks.

In the picture above you will see two arrowed points. These points are the power contacts that make contact with the two seriously corroded battery contacts you can also see above. No wonder there is no power getting to the board. I suspect this might be the cause of our electrical problem.

Repair:

First thing to do is to get those battery contacts cleaned, as well as having a good clean of the main board. This has now been done. I’ve repaired the broken screw post by simply using a rubber washer that has been sufficient for this repair.

Contacts before and after

A friend of mine has kindly offered to print me off four of the “Double Y” springs to replace the ones that are already in place and broken. He owes me a favour or three and needs some subject matter to run through his new 3D printer so I’m very pleased to help him, as pending the outcome I may well buy one myself, as I have been threatening to do so for a while now. This should sort out the issue of the unresponsive pads, first found in the assessment of the item. He’s panicking that they might not be smooth and beautiful, I’ve told him not to worry as they are hidden inside anyway.

What I currently have on the left, what I’m expecting on the right

He’s just supplied me with five double “Y” pieces just in case one is damaged in some way. Let’s get these put in place to see the difference these make.

Out with the old
In with the new

With the new springs in place the pads are working as they were originally designed to, now with some springiness in their operation. The battery contacts have now also been put back in place.

Cleaned contacts back in place

When assembled, the buttons are a little erratic and not always responsive so I decide to look into this further. A quick Look at the board shows that the solder contacts on the board for all of the button connections are worn, the solder has failed so I decide to reflow all these solder joints to improve the contacts. This appears to have worked as the unit when reassembled, now has uninterrupted operation. This is an age related issue. A simple fix.

Old solder joints that have failed and needed re-flowing

Result:

Another 47 year old saved from the scrap heap, it’s been an interesting and sometimes confusing repair and I thank my friend who stepped in to save the day by utilising his 3D printer to make some parts. Without his assistance this repair would not have been achievable.

Looking smart after a quick clean

It’s just another old piece of retro history to add to my ever growing collection and much to my wife’s dismay. Bless her.

Now working

Thanks for passing by, as always it’s very much appreciated.