ASAHI PENTAX S3, Service Manual

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DEFECTS CAUSES SERVICING
Shutter curtains do not
start.
Though the mirror seat (B10) flips up, the
1st curtain checker arm (E07) does not
slip off the stud of the top selector gear
(E15).
Check if the mirror seat flipping mechanism
is functioning smoothly. If found O.K., re-
place the mirror seat spring (B44) as it might
have been weakened.
Slow speed shutter
exposure timing is too
fast.
Relative position of the slow speed lever
(F07) to the stud of the coupler gear (F18)
is not deep enough.
Make necessary adjustment. (Refer to
Chapter II, 2 d.)
Slow speed shutter
exposure timing is too
slow.
1. Relative position of the slow speed
lever (F07) to the stud of the coupler
gear (E18) is too deep.
2. The travel speed of the 2nd
curtain is too slow.
1. Make necessary adjustment
(Refer to Chapter II. 2
d.)
2. Adjust the curtain travel speed.
High speed exposure at
slow speed setting.
1. Slow speed governor is not returned.
2.
Slow speed lever (F07) does not hook
the stud of (E18).
1. Disassemble and wash
the governor, or
replace the complete governor.
2. Adjust the coupling of the stud of (E18)
with (E07). (Refer to Chapter II, 2 d.)
The mirror does not flip
up.
Mirror actuator lever, bottom (B19) does
not properly hook the pinion coupler lever
(E10).
Wash (E10) to make it function smoothly. f
the pinion coupler lever spring (E63) is
of the old type of 0.12 mm, replace it with
a new one of 0.15 mm.
The mirror does not
return.
Bottom actuator lever spring (B47) is
either weakened or damaged.
Replace (B47).
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