The old Minolta repair manual from 1982 I found in a junk shop

Last week I dug through a box at an estate sale near Pittsburgh and found a factory service manual for Minolta SR-T cameras from 1982. It's got hand-written notes from the original tech in the margins about common shutter timing issues. Last month I used one of his tricks to fix a 201 that three other repairers had given up on. Three years ago I would have just ordered a new circuit board and called it done. Now I'm thinking about how much craft got lost when we switched to all digital repair methods. Anyone else got old manuals or notes from retired techs that still work better than modern guides?

3 comments

3 Comments

taylorellis21d ago

wait but what exactly was the trick for the shutter timing? was it a specific spring adjustment or did he have a workaround for the old cloth shutters that dry out? i've got a beat up copy of the canon F-1 manual from '73 and half the stuff in there is about lubricating parts that nobody even stocks anymore. feels like those guys knew which screws to back off a quarter turn vs. just cranking down on everything. the cursive notes in mine mention "never use lithium grease on the mirror damper" which i learned the hard way is actually critical.

anthony12921d agoMost Upvoted

Man, you really gotta watch those old cloth shutters - they shrink over time and throw the whole timing off. Easiest trick is to back off the main spring tension screw a hair and test with a slow speed like 1/8th to see if it holds open steady before touching the high speeds. Honestly, the mirror damper thing is no joke either, lithium grease turns into glue after a few years and that thunk gets brutal.

emery_white21d ago

Wait, are you saying the main spring tension screw trick is better than just replacing the shutter curtain entirely? I used to think you had to swap out the whole cloth assembly if it shrunk, but after ruining a perfectly good Pentax Spotmatic by cranking down on everything like a gorilla, I totally get it now. Backing that screw off a hair and testing at 1/8th makes way more sense - I did it on my old Minolta SRT and the timing smoothed right out without having to hunt for replacement parts nobody makes anymore. The lithium grease point hit me hard too, I had to clean that gunk off my mirror box with isopropyl and it was a nightmare.