Timing Switch (S2) Adjustment; Bellows Light Leak Check - Polaroid ProPack Repair Manual

7. Examine flash switch S4. (Refer again to Figure 2-5). The switch contacts
should close only when actuated by the edge of the capping blade. At all other
times, the contacts should be separated by about 1/32 inch (.07938cm). Also,
check that the contact is not so severely bent that the capping blade will pass over
it without actuating the switch. Carefully, bend the switch contacts to satisfy
these requirements.
G.

TIMING SWITCH (S2) ADJUSTMENT

The adjustment of this switch is critical. The switch must open immediately upon actuation of
the opening blade to insure proper shutter timing for the entire exposure. Additionally, after the
exposure, the switch must close positively to provide a path to completely discharge the timing
capacitator. Adjust the switch as follows:
1. Set a VOM to the R X 1 scale.
2. Place one of the VOM probes across both contacts of S1 (Figure 2-5).
3. Place the other probe on the stationary contact of S2. The meter should indicate
continuity.
4. Slowly press point A on the capping blade until all of the slack is removed from
the three blade assembly. The meter should still indicate continuity.
5. Turn the adjusting screw clockwise until the switch opens (no continuity).
6. Very slowly turn the adjusting screw counterclockwise and stop the instant the
meter again indicates continuity.
7. Note the position of the screw-head, and then turn the screw exactly three full
turns counterclockwise.
8. Reassemble the camera and perform the SHUTTER EXPOSURE TESTS.
H.

BELLOWS LIGHT LEAK CHECK

Check the integrity of the bellows by looking for pinholes (usually in the creases). Also be sure
the bellows tabs are secure and that the bellows gasket is OK. If you suspect that there might be
a light leak, test the camera using 3000 speed film.
24 ProPack Camera