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Roy Laird
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 09, 2004 - 08:11 am: | 
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The self-timer on my Canonet QL19 is jammed, so the shutter won't fire. I went in through the front of the lens, but found that the shutter and self-timer are mounted behind the lens chassis. Does anyone know how to get at them to unjam or remove the timer? |
Winfried
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 09, 2004 - 11:42 am: |
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It is very difficult to disassemble the shutter of the QL17/QL19 (new version with compact body), I once tried to unjam a self timer and was very happy I had a working shutter assembly to swap... You can refer to the Canonet QL17 service manual on this site and try to disassemble the shutter further - if you are lucky you will get it back together again. |
Roy Laird
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 10, 2004 - 07:44 am: |
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Thank you, Winfried. With the help of the exploded diagrams, I removed the lens assembly from the camera body and took the mounting plate (with the meter) off the back of the lens. But now I'm stuck again. Beneath the helix mount are screws that promise to release the cover hiding the shutter, but the mount will not come off because the shutter-cocking lever prevents it from turning all the way. So where do I go from here? Do I now have to go in from the front of the lens again? |
Winfried
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 10, 2004 - 07:46 am: |
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As I mentioned I never did this assembly completely - I would like to help you if only I could. |
Roy Laird
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 13, 2004 - 05:37 pm: |
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Canonet QL 19 Shutter and Self-Timer
Ok, this is how it is done (part numbers refer to the exploded diagrams of the GIII QL 17 at https://kyp.hauslendale.com/classics/repairmanuals.html, pp. 1-2). I am assuming that you have done other similar repairs and that all you need here are general instructions. Remember to take photos before you remove anything and to lay out the parts in a tray in the order you took them off.
To get at the shutter and self-timer of the QL 19 (and the QL 17 seems identical), you must go in from the back of the lens. It seems to be possible, although awkward, to do this without removing the lens assembly from the camera body, but I did not try. Instead, I removed the lens assembly from the body and then removed the rear element and shutter cover. Here is how.
1) Remove the top and bottom camera covers.
2) Peel back the vulcanite on both sides of the lens mount to reveal the cover plates. Be patient: it is well glued and must be gently pried up and peeled back without stretching or ripping.
3) Remove the front cover plates (two screws each).
4) Disconnect the shutter linkage at the base of the shutter-release button (two screws, 13-9228 on p. 1).
5) Gently lift out the bright-frame mask (19-0556) from in front of the rangefinder window. Note how it is held in place by a spring on top and how it rides a lever on the lens assembly.
6) Remove the four screws fixing the lens and meter assembly to the camera body. The top left screw (looking from the front) is partly hidden behind the shutter-release linkage.
7) Gently lift out the lens and meter assembly and unsolder the blue wire to separate it entirely from the camera body.
8) Remove the rectangular rear hood (13-9199, on p. 2) from the rear of the lens assembly by removing the two small screws and screw plate.
9) Remove the rear-lens outer retaining ring (27-8643-010). This ring is LEFT-HAND threaded -- remove by turning it CLOCKWISE. To loosen this ring, soften the cement holding it with a dewaxing solvent such as Gon (applied very sparingly with a fine brush -- such solvents melt plastic and dissolve lens coatings). It is impossible to remove this and the next ring without the proper spanner wrenches -- I made one from a steel hinge and another from a brass door strike.
10) Remove the rear lens element (18-0446-010) by unscrewing it counterclockwise. Lubricate it sparingly with Ronsonol first until it can be turned.
11) Mark the position of the focus ring and then loosen the three set screws and the other screw so that the focus ring can slip off the helix barrel.
12) Separate the lens and shutter assembly (the front part of the lens) from the rear mounting plate. They will still be attached with four wires Ð to get some working slack, remove the clamp holding the wires against the shutter rear cover.
13) Lift out the shutter cocking ring (13-9200) and the other ring (13-9298).
14) Remove the aperture lever and spring (at the end of the post sticking out of the shutter cover).
15) Remove the three screws holding the rear cover of the shutter, cock the shutter, and lift off the cover.
16) Lift off the shutter-speed selector ring to reveal the shutter and self-timer mechanisms (note the various pins that must be keyed into this ring on assembly, and the speed-selector lever that keys into a slot on the outside of the ring).
The self-timer on my QL19 was jammed because the ratchet spring had bent and was preventing the gear from unwinding. I removed the self-timer (which is held in only by a tiny spring clip), removed the offending gear, and replaced the now-disabled mechanism. The only reason I replaced it was that it supports the pin-and-spring assembly that gives click stops to the shutter-speed selector ring. With the shutter now exposed, lubricate with Ronsonol and work the shutter until it does not stick (you may want to remove the front lens element so you do not get it wet). |
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