Curtain Assembly; Curtain Inspection - Pentax MX Service Manual

Curtain assembly

1. Curtain inspection

2. Install 1st and 2nd pinion shafts (0-E2, 0-E7), (0-E118), (0-E108), (0-E135) and 2nd curtain assembly
(0-E38) to Top mec.plate assembly (0-C1).
3. Install Top mec.plate assembly (0-C1) to camera body temporarily.
4. Give slight tension to 2nd curtain.
5. Install 1st curtain assembly (0-E36) and Curtain plate assembly (0-A25).
6. Removing Top mec.plate assembly (0-C1) from camera body for a while, engage 1st curtain string with
the 2nd curtain pinion rollers and re-install Top mec.plate assembly (0-C1) to camera body without
slipping off the string from rollers.
7. 2nd curtain hold position — with shutter cocked 2nd curtain should stay at 5mm distant from picture
frame when High speed lever hooks Bottom selector gear assembly (0-E124).
Adjust the position of 2nd curtain with changing the coupling between 2nd pinion gear and (0-E124).
8. Install Top selector gear assembly (0-E113) with shutter released, facing the retainer screws of 1st
°
curtain pinion 45 forward.
ASAHI PENTAX MX (23800)
Check if Aron-alpha is applied to curtain string as shown in
Figure.
Aron-alpha is applied to increase durability.Curtain string
should be, bent parallel with shutter curtain.
Give slight tension to 1st curtain.
Arrangement of both curtains is opposite from SP type
camera.
Install 1st curtain (0-E36) engaging 2nd curtain string
with the rollers.
23800 16 /36