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October 9th, 1995
2. Lamp Error
Symptom:
The problem cannot be solved with the procedures in the user's manual.
Possible Cause:
•
A mirror is out of position.
•
Misalignment.
•
SCU damaged.
•
SBU damaged.
•
SDU damaged.
•
PSU damaged.
Procedure:
Does the lamp light during scanning?
Yes
No
Does the 24V LED light on the MBU?
Yes
Does the SDU generate 24 volts?
(Connect the tester probes to pin 1 and 2 of CN3.)
Yes
Replace the lamp harness.
Are all mirrors installed properly?
Yes
No
Reseat any mirrors that are out of place.
Does the SBU generate the correct signals?
Yes
No
Replace the SBU.
Replace the SCU. If that does not work, try changing the MBU.
TROUBLESHOOTING PROCEDURES
No
Is the PSU harness damaged?
Yes
No
Replace the PSU.
Replace the harness.
No
Replace the SDU.
6-5
TROUBLESHOOTING
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