Darkslide Transport And Counter Wheel Indexing - Polaroid Joshua Vision Service Manual

Darkslide Transport and Counter Wheel Indexing

The third and fourth results of loading a film pack into the camera are the darkslide cycle and picture
counter decrementing (counting down) or indexing.
When power is made as VER closes to B+, the microprocessor checks the status of the Full Chamber, EOP
(End of Pack) and DKEC (Dark Slide End Of Cycle) Switches. If the picture chamber is not full and the
counter wheel has not reached the tenth exposure, their corresponding switches will be open. The micropro-
cessor will then signal the strobe to recharge (the fifth result of loading the film pack), and through the
power IC, run the motor because the DKEC switch is closed.
The motor runs, rotating the Timing Gear (see Figure 2-12), which cams the Door Stop Link down to its
DKEC-closed position. (Actually, the DKEC Switch is already closed.)
Figure 2-12. Timing Gear Cam Actuates DKEC Switch through Outer Door Stop Link
Another cam on the Timing Gear advances the Pick Carrier (Figure 2-13), causing the Pick to pull the
darkslide into the Feed Rolls. From there the darkslide hits the Spread Rolls, after which the Chamber Pick
moves the darkslide the final fraction of an inch into the picture storage chamber.
Figure 2-13. Cam Advances and Holds Pick Assembly Forward for Entire Camera Cycle
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