2-38 Service Manual
Dead machine service check
CAUTION: Check the AC line voltage. The voltage should be within the following limits:
• 100 V ac (volts alternating current)-127 V ac for the 110 V printer
• 200 V ac-240 V ac for the 220 V printer
FRU Action
LVPS/HVPS
Unplug the printer. Remove the LVPS/HVPS, and check the fuses for continuity.
• If open, then replace the LVPS/HVPS.
• If not open, then check the switch continuity across its conductors with the switch on.
Turn the switch off. Plug the AC line into the LVPS/HVPS and switch unit on.
Note: Voltages are exposed at several places on the board. Do these verifications, and then
unplug the AC cord from the power supply:
• If voltages are not correct, then replace the LVPS/HVPS.
• If voltages are correct, then check the engine board. See “Engine board service
check” on page 2-36.
• If the engine board checks out ok, perform the controller board service check.
Pins Voltage
CN201-6, 17,
19
+24 V dc
CN201-10, 12,
14, 16, 18
Ground
CN201-1,3, 5,
11,13, 15
+5 V dc
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