Christie 35/70 Maintenance And Service Manual page 96

Automated electronic film projector

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5-1

Step

This condition is caused by a failure of the Pulldown system. The

Constant Velocity system will continue to move film forward until the

CPU receives the zero-degree and index signals from the Pulldown

Sensor. Repair as indicated.

5-2

Step

Replace the 2285 card.

5-3

Step

If it resists in one direction but not the other, replace the 2285 card;

otherwise, continue to Step 2.

While in the READY mode, verify that there is a +34-volt supply

voltage at the positive end of C8 on the 2285 card. If not, check the

fuse (fuse 2), wiring, ready relay, and power supply associated with the

Constant Velocity system. Repair if problem is found.

CHRISTIE INC. - - 35/70 Service/PM Manual

CHRISTIE INC.

July, 1997

READY DIAGNOSTIC TABLE

The Constant Velocity sprocket will not advance film one frame and lock –

CONDITION 1: The constant velocity sprocket advances film forward, but does

not stop after one frame.

The Constant Velocity sprocket will not advance film one frame and lock –

CONDITION 2: The constant velocity sprocket turns with enough force or speed to

trip the buckle switch or damage film.

The Constant Velocity sprocket will not advance film one frame and lock –

CONDITION 3: The constant velocity sprocket does not advance film and can be

turned by hand, at least in one direction.

Table 7.8: READY Diagnostic Table (Continued)

7 : T r o u b l e s h o o t i n g G u i d e

Diagnostic

Result

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