CH APT ER I I I .
FI N AL T EST S
Upon completion of all assemblies, final tests should be performed. Needless to say, such strict,
thoroughgoing tests as are performed at the time of manufacture are not only practicable but
unnecessary.
However, final tests should be conducted according to the following procedures. Inasmuch as each of the
following paragraphs has much to do with what are described in Chapter II, refer as far as possible to applicable
paragraphs in Chapter II.
When checking finder focus, mount the standard lens. For the other parts, use the camera body only.
a. WIND-UP LEVER PERFORMANCE
When the rapid wind lever is cocked, it must function smoothly without stiff feeling, creaking noise or
sudden heavy feeling during the course of cocking; and when it is freed, it must return completely to its
original pre-winding position.
Remember that if the interior assembly and adjustment and/or lubrication are incomplete, they will
invariably result in ill functioning of the lever.
b. FILM COUNTER PERFORMANCE
With the counter dial set at "0," watch the turn of the dial while cocking the rapid wind lever, say, 10
times, to check whether the dial completely travels one scale after another, or whether it travels 2
notches, with single cocking. Also determine if the indicator progresses accurately even when the wind
lever is either slowly or rapidly cocked.
c. SHUTTER BUTTON PERFORMANCE
The shutter must function smoothly when the shutter button is depressed.
It must lift back to its original position the moment the depressing finger is off the button. After the
mirror has flipped up and the shutter closed, the shutter button still must, have some clearance to be
depressed slightly further.
After cocking the rapid wind lever, if the shutter button is released while lightly pushing the sprocket
gear to the opposite direction, the shutter button must function smoothly.
d. Check whether the shutter speed dial and the index ring are correctly aligned. This checking is necessary
because the speed dial couples with Asahi PENTAX clip-on meter. Also, check whether the speed dial
turns smoothly and clicks properly at each calibration.
e. When the rapid wind lever is cocked, the red "cocked" indicator must appear, occupying more than 2/3
space of the window; and when the shutter is released, over 2/3 space of the window must be blacked
out.
f. The rewind shaft, when pushed in, must correctly click, rotating smoothly.
g. The film type dial needs such friction as not to rotate too easily.
h. The "R" button, when pressed, must go in smoothly, and snap back to its original "out" position upon
cocking the rapid wind lever.
As the "R" button rotates whenever the rapid wind lever is cocked, check carefully whether it is not in
contact with the bottom cover.
i. Turn the spool brim to find out whether it has a proper friction.
In case of any doubt as to the extent of the friction, compare it with a new camera.
j. MIRROR PERFORMANCE
Determine if the flipping up of the mirror is smooth, thereby causing the curtain-actuating lever to
function satisfactorily. Move the mirror seat up with your fingertip to find out whether the mirror will
return smoothly to its original position, when the camera is not charged.
k. SHUTTER PERFORMANCE
230-2
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Summary of Contents for PENTAX S3
Page 1: ...PRODUCT NO 230 2 ASAHI PENTAX S3 SERVICE MANUAL 230 2 1...
Page 37: ...EXPLODED ILLUSTRATIONS Fig 1 230 2 37...
Page 38: ...Fig 2 230 2 38...
Page 39: ...Fig 3 230 2 39...
Page 40: ...Fig 4 230 2 40...
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