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
SLEW MOTION DIAGNOSTIC TABLE
A-4
Film does not ramp smoothly to 120 frames per second –
CONDITION 4: Film ramps up to maximum speed, but motion is not smooth.
Step
Diagnostic
Result
1
This may indicate worn brushes in the Constant Velocity Tach.
Replace brushes or motor/tach assembly.
2
If condition continues, check for a loose belt or loose set screws that
hold pulleys to their shaft. Any mechanical play between the CV motor
and the sprockets will result in irregular motion. Tighten as required.
3
Verify the spring tension of the Upper and Lower Torque Arm
assemblies are equal and at their proper value. An imbalance puts
excessive load on the Constant Velocity system. Readjust if necessary.
(See Section 6.3.)
A-5
Film does not ramp smoothly to 120 frames per second –
CONDITION 5: Film ramps up to maximum speed, then ramps down to a stop
with the #6 LED illuminated.
Step
Diagnostic
Result
1
Verify all power supply voltages to CV 2285 card. Repair connections
or power supply as necessary.
2
Determine problem to be either defective 2285 amplifier card or
defective 2293 CPU/Main Logic card. Repair or replace.
B
Film does not ramp to 120 frames per second in the reverse
direction in a smooth and linear motion.
Step
Diagnostic
Result
Repeat the steps described in A-1 through A-4 of this table, using the
<REV> button to initiate film motion..
Table 7.10: Slew Motion Diagnostic Table (Continued)
