7 : T r o u b l e s h o o t i n g G u i d e
CHRISTIE INC.
CHRISTIE INC. -
- 35/70 Service/PM Manual
July, 1997
READY DIAGNOSTIC TABLE
5-1
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.
Step
Diagnostic
Result
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
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.
Step
Diagnostic
Result
Replace the 2285 card.
5-3
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.
Step
Diagnostic
Result
1
If it resists in one direction but not the other, replace the 2285 card;
otherwise, continue to Step 2.
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.
Table 7.8: READY Diagnostic Table (Continued)
