Brand: PENTAX
Category: Camera
Document Type:
Language: EN
Manual for PENTAX S3
Uploaded: Aug. 9, 2025, 11:46 p.m.
Summary of Structure and Performance
Upon cocking the rapid wind lever, the bounce stopper mechanism is first released, the shutter curtains are wound, and the mirror actuator lever, bottom (B19) tensions the mirror seat spring (B44) and the dia lever spring (B72).
When the shutter button is depressed, the bulb lever will be so positioned as to prevent rotation of the bottom selector gear (E44) which is connected with the 2nd curtain, and at the same time will contact the high speed cam (E85) which selects the high speed exposure timing.
During the rotation of the 2nd dia lever, the reflex mirror is released and starts flipping upward.
The shutter exposure timing can be determined by turning the shutter speed dial.
Troubleshooting and error codes
| Cause of Defects | Servicing |
|---|---|
| When the shutter curtains, high speed cam and bulb lever parts are not replaced, correct exposure timing may be obtained merely by adjusting the curtain travel speed, without adjusting the screw (20). | Adjust the curtain travel speed. |
| Irregularity of exposure timing | Causes: Oiled or stained top idling gear; Dusted or improperly oiled high speed cam (E85); Improperly oiled bottom selector gear (E14); Improperly oiled 1st, 2nd curtain pinion shafts (E31) (E32), and shaft receptacle parts of both top and bottom mec plates (C01) (C02); Improperly oiled brass curtain roller metal (E37). |