Adjustment Of Slow Speed Exposure Timing (1 Sec-1/30 Sec) - Pentax ASAHI SPOTMATIC 23102 Service Manual

(6) Re-check the speeds at 1/1000 sec. and 1/125 sec. respectively.
If the speed either at 1,/1000 sec. or
1/125 sec. is out of tolerance, replace
the high speed cam (05219 or 05319).
Two types of the high speed cam,
(05219) and (05319), are available for
adjusting purposes.
The two types of the cam differ in
shape. (05219) is designed for
increasing the exposure timing at
1/1000 see, while (05319) is designed
to slow it down.
(7) Test and determine the exposure timing at five different shutter speed settings, viz., 1/1000 see. (1
ms), 1/500 see. (2 ms), 1/250 see. (4 ms), 1/125 see. (8 ms) and 1/60 see. (16.7 ms), respectively.
If the exposure timing at 1/1000 sec. and 1/125 sec. is found to be within tolerance, the exposure
timing at each of the other three shutter speed settings is automatically adjusted within tolerance.
d. ADJUSTMENT OF SLOW SPEED EXPOSURE TIMING (1 sec. - 1/30 sec.)
(1) Measure the speed at 1/30 sec. (33.3 ms).
(2) Ease the adjust nut (05111), with the special tool 225 K-E 48-A.
Rotate the set screw (Set T 1.4 x 2.5) clockwise to slow down the exposure timing; and counter-
clockwise to increase it. After adjustment, fasten (05111).
(3) Re-check the speed at 1/30 sec.
(4) Measure the speed at 1/8 sec. (125 ms).
(5) If the timing at 1/8 sec. is out of tolerance, adjust as per (2) above.
(6) Re-measure the timing at 1/30
sec. and 1/8 sec. respectively. By
repeating the measurement and
adjustment, adjust the timing
within tolerance.
Once the exposure timing at the above
two shutter speed settings has been
correctly adjusted, correct exposure
timing at the other speeds, 1/15 sec.
(66.7 ms), 1/4 sec. (250 ms), 1/2 sec.
(500 ms) and 1 sec. (1000 ms), may be
automatically obtained by means of
the function of the slow speed cam
(05020).
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