ironringer Posted September 30, 2015 Share #1 Posted September 30, 2015 Advertisement (gone after registration) Has anyone self-serviced their Leicameters - opened them, found and fixed obvious problems (e.g. electrical contacts, binding of meter needle, range switch affecting operation, dirt, etc.), and then re-assembled them? I have MC and MR meters that show indications of not being dead, because if I tap them or move the range switch they sometimes respond to light (the needle moves). I have a feeling they have contact problems that could be self-serviced, if proper instructions are followed. Professional service in Nuremberg is very expensive ... 1 Quote Link to post Share on other sites More sharing options...
Advertisement Posted September 30, 2015 Posted September 30, 2015 Hi ironringer, Take a look here self-service Leicameters?. I'm sure you'll find what you were looking for!
a.noctilux Posted September 30, 2015 Share #2 Posted September 30, 2015 Yes, many times. Not really easy neither difficult, if one is a bit patient and has some experience with little tools. Following this may help: http://feuerbacher.net/photo/frame.html?repair/Leicameter/Leicameter.html~Main Arnaud 2 Quote Link to post Share on other sites More sharing options...
TomB_tx Posted September 30, 2015 Share #3 Posted September 30, 2015 Yes, I've bought several "inoperative" MR & MR4 meters, and most were easy to clean and restore, except where a prior owner had butchered it. The MR4 especially can have a plastic guide pin wear where it slides on the edge of the circuit board, so the contact on the switch moves to the side of the mating contact. I've fixed these by building up the edge of the circuit board with epoxy, which fixes the problem and provides a smoother guide. Otherwise a contact enhancer-cleaner like Deoxit Gold cures most problems, except for the occasions broken plastic part. Quote Link to post Share on other sites More sharing options...
jerzy Posted October 1, 2015 Share #4 Posted October 1, 2015 Yes, MRs are pretty easy to fix, as TomB_tx described. Battery topic, replacement for PX625 has been covered in Forum in the past. different story is with MC, in most of cases it is selen cell which is dead. Replacement may be cut-off from another, working light meter or any camera with light meter. Drop me PM if you need more detailed instructions how to disassembly MR. 1 Quote Link to post Share on other sites More sharing options...
jc_braconi Posted October 1, 2015 Share #5 Posted October 1, 2015 I made some reworking after contact cleaning Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! 2 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/250809-self-service-leicameters/?do=findComment&comment=2897165'>More sharing options...
ironringer Posted October 3, 2015 Author Share #6 Posted October 3, 2015 Thank you everyone for your good advice, and Mr. Braconi for his inspiring picture of the layed-out MR parts. I will research detailed instructions and dig into one of my meters. I assume there must be a certain orientation to replace the geared wheel and dials, so they are in proper synch with the pin that sets the shutter speed? Like the camshaft timing on a car. Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted October 3, 2015 Share #7 Posted October 3, 2015 (edited) Advertisement (gone after registration) Hello Ironmonger, Yes there is a certain method to putting these meters together. The internal components must be properly sync'd. These meters are relatively simple & reasonably robust. Altho if you break a part of it replacement parts can be pricey. Make sure you clean the contacts well. A typewriter eraser works very well. Oxidized/Dirty contacts are the cause of a lot of people's meter problems. Also: Those 5 screws on the foot of the attachment shoe are not just there to look at. The 3 larger ones anchor the shoe to the meter while the 2 smaller ones act as pivot points. This is to allow you to adjust that shoe so you are able to attach the shoe to the meter so sliding the meter into the accessory receptacle does NOT scratch the top plate of the camera. Remember to first dial the meter to "B" and then to lift & rotate the dial on the meter all the way to "120" when putting the meter on the camera & when taking it off. Please make sure: The pin on the bottom of the rotating shutter speed dial of the meter engages the cut out on the top of the shutter speed dial on the camera correctly so that: The pin's engagement is at a sufficient depth, regardless of where the dials are set: To sit at a proper depth within the cut out without there being too much contact between the 2 respective wheels. All of this is actually easier to do than it might seem. Best Regards, Michael Edited October 3, 2015 by Michael Geschlecht 1 Quote Link to post Share on other sites More sharing options...
a.noctilux Posted October 4, 2015 Share #8 Posted October 4, 2015 Ironringer, If you have not yet begin the repair, take care of two more things : -note the order of the washers, if wrong order the ASA dial would be loose -one time, lifting the plastic battery cover some millimeters too far, I have broken it Arnaud Quote Link to post Share on other sites More sharing options...
jimofnyc Posted October 7, 2015 Share #9 Posted October 7, 2015 Be wary of cleaning contact surfaces with a pencil eraser. Rubber contains sulfur - which oxidizes metal over time. Quote Link to post Share on other sites More sharing options...
ALEGUTIE Posted July 28, 2022 Share #10 Posted July 28, 2022 On 10/1/2015 at 2:11 AM, jerzy said: Yes, MRs are pretty easy to fix, as TomB_tx described. Battery topic, replacement for PX625 has been covered in Forum in the past. different story is with MC, in most of cases it is selen cell which is dead. Replacement may be cut-off from another, working light meter or any camera with light meter. Drop me PM if you need more detailed instructions how to disassembly MR. Hello, I need your help to fix my Leica meter M. Please explain more how to replace the selenium battery, the voltage, etc Thanks Alejandro Quote Link to post Share on other sites More sharing options...
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