6/02
2-89
DC1632/2240
6-371
Status Indicator RAPs
Prelaunch Training/Review
6-371 Exposure Lamp
Open circuit of the Lamp was detected.
Procedure
BSD 6.2 BSD 6.12A
Enter dC330 [006-002]. Press Start. The Exposure Lamp illuminates.
YN
Switch off the power. Remove the following Platen Glass and the IPS Cover. Switch
on the power.
There is +24VDC between J720-2 (+) on the IIT/IPS PWB and GND (-).
YN
Remove the DADF and the IIT Top Cover. There is +24VDC between J 702-1 on
the IIT LVPS (+) and GND (-).
YN
Switch off the power. Disconnect J 702 from the IIT LVPS. Switch on the
power. There is +24VDC between the IIT LVPS P 502-1 (+) and GND (-).
YN
Check for IIT LVPS On signal from ESS
Check the input power (ACH) to the IIT LVPS.
If no problems are found, replace the IIT LVPS (PL 18.4)
Check for a short circuit. Refer to the IIT+24VDC wirenet
Check the wires from J 702 on the IIT LVPS to J 720 on the IIT/IPS PWB for an open
or short circuit.
There is +24VDC from J 724-3 on the IIT/IPS PWB to GND.
YN
There is +24VDC from J 724-1 to J 724-4 on the IIT/IPS PWB.
YN
Replace the IIT/IPS PWB (PL 18.3)
Replace the following parts:
Lamp Wire Harness (PL 18.6)
Lamp Ballast PWB (PL 18.6)
IIT/IPS PWB (PL 18.3)
Enter dC 330 [006-002]. Press Start. The voltage at J 724-3 drops to approximately
7.5 VDC.
YN
Replace the IIT/IPS PWB (PL 18.3)
Replace the following parts:
Exposure Lamp (PL 18.6)
Lamp Wire Harness (PL 18.6)
Lamp Ballast PWB (PL 18.6)
Check the following:
ï The White Reference Board on the reverse side of the Platen Glass for excessive con-
tamination
ï The optical light path for contamination
If no problems are found, replace the Lens Kit (PL 18.4) (REP 6.4) (ADJ 9.6).
If the problem continues, replace the IIT/IPS PWB (PL 18.3).
If the Exposure Lamp is not brightly lit, replace the Exposure Lamp (PL 18.6).
If the problem continues, replace the Lamp Ballast PWB (PL 18.6).
To Next Page
Loading...
Need help?
General