Diagnostic information 2-75
4500
FRU Action
Fuser lamp
Lamp cable
LVPS
Unplug the printer and disconnect
the fuser lamp cable plug from the
LVPS board connector CN2.
Check for continuity across the fuser
lamp pins 1 and 2.
If there is continuity, go to Step 1:
Continuity.
If there is no continuity, go to Step 2:
No Continuity.
Step 1: Continuity
Measure the voltage at connector
CN2 on the LVPS. It should match
the line voltage.
• If line voltage is not present, see
“Low voltage power supply
(LVPS) service check ” on
page 2-76 for more information.
Make sure the fuser thermistor is
correctly connected to the engine
board. If the problem persists,
disconnect the thermistor cable at J7
(engine board in E320/E322) or J14
(controller card in E220/E321/E323)
and check for less than +5 V dc on
pin 1. Pin 2 should be ground. See
“Engine board (E320/E322 only) ”
on page 5-2 or page 5-7 for more
information.
• If the voltage is incorrect, see
“Engine board service check
(E320/E322) ” on page 2-72 or
“Controller card service check
(E220/E321/E323) ” on
page 2-67 for more information.
Step 2: No Continuity
Check the lamp cable for continuity.
• If correct, replace the lamp.
• If incorrect, replace the lamp
cable.
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