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

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.

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.

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.

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.

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

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.