2-72 Service Manual
4500
Engine board service check (E320/E322)
FRU Action
Engine board Ensure +24 V dc from the LVPS
board to the engine board.
1. Turn off printer.
2. Disconnect the fuser lamp cable
plug from the LVPS board. See
“Connector locations ” on
page 5-1 for more information.
3. Disconnect the LVPS/engine
board jumper cable from the
engine board. See “Connector
locations ” on page 5-1 for more
information.
4. Turn printer on.
• If voltage is correct, ensure
J12–power supply unit (PSU) is
properly seated in the J12–PSU
connector on the engine board.
• Check for +24 V dc on the cable.
• If voltages are not present or
incorrect, see the “Low voltage
power supply (LVPS) service
check ” on page 2-76 for more
information.
Note: With all cables connected, the
printer should complete
POST within approximately
12–15 seconds in the
following sequence:
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