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2-50 Service Manual
5016-001
Erase Lamp Service Check
Note: The erase lamp assembly is mounted on the top of the
printhead assembly.
FRU Action
1 Printhead Erase
Lamp
Engine Board
Erase Lamp
Cable
Check the cable to be sure it is installed properly
from CN14 on the engine cable to CN750 on the
erase lamp assembly.
If the cable is installed correctly, check the voltage
on the engine board at CN14 pin 21. It should
measure +24 V dc.
• If incorrect, replace the engine board.
• If correct, check the voltage at CN14-22 while
running a print test. The voltage should change
from approximately +5 V dc to 0 V dc when the
erase lamps turn on and off.
• If incorrect, replace the engine board.
• If correct, check the cable from CN14 erase
lamp assembly on the engine board to CN750
on the erase lamp assembly.
• If incorrect, replace the cable.
• If correct, replace the erase lamp assembly.