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Semiannual Preventive Maintenance Requirements
Table 4.5 contains the semiannual preventive maintenance checklist/log sheet.
1.
Check the brushes on all five servo motors.
2.
Check EOF/BOF sensor voltage and adjust if necessary. (See Section 6.2.)
3.
Inspect CV buckle shoes for excessive wear. Replace if necessary.
Yearly Preventive Maintenance Requirements
Table 4.6 contains the annual preventive maintenance checklist/log sheet.
1.
Ensure that the coupling between the tacho roller and the tacho generator is secure and there is no slippage between
the generator and the roller.
2.
Check all power supply voltages: +5V, +15V, +34V, and +24V.
3.
Ensure the reeling motor brakes are operating properly in the NOT READY mode and disengaging properly in the
READY mode.
4.
Visually inspect the entire projection system for loose bolts or screws and damaged cables.
5.
Replace particle transfer rollers to maintain film cleaning effectiveness.
6.
Clean the back of the projector with the vacuum.
Preventive Maintenance Requirements for Lamphouse
Table 4.7 contains the lamphouse preventive maintenance checklist/log sheet. The following steps should be performed
with the lamp removed whenever the lamphouse bulb is replaced:
1.
Clean lamphouse mirror with tissue paper or optical wipes. Be very careful not to scratch the mirrored surface.
2.
Clean the lamphouse assembly with the vacuum.
3.
Check the lamp connectors for corrosion and security.
4.
Check for any loose connectors.
5.
Check douser limit bumpers for wear and replace if necessary.
Refer to the lamphouse manual for any other specific maintenance requirements.
CHRISTIE INC. - 35/70 Service/PM Manual
July, 1997
•
When reinstalling old brushes for ANY motor, ensure that the brushes are
installed in their original location and in the same direction.
•
The installation of new pulldown motor brushes requires a burn-in period of at
least 24 hours. The pulldown motor must be toggled between forward and reverse
every hour to properly wear in the brushes and to prevent jitter. It is
recommended that an external 12- or 15-VDC power supply be used to run the
motor.
Always verify that the lamp is removed and power to the lamphouse is shut off. Failure
to do so can result in severe injury!
4 : P e r i o d i c M a i n t e n a n c e
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