Lexmark E330 Service Manual page 82

4505
Fuser service check (continued)
FRU
Lamp cable
LVPS/HVPS
Fuser
2-54
Service Manual
Action
Unplug the printer and disconnect
the fuser lamp cable plug from the
LVPS/HVPS board connector
CN102.
Check for continuity across the fuser
lamp by checking across the
connector pins.
• If there is continuity, go to Step 1:
Continuity.
• If there is no continuity, go to
Step 2: No continuity.
Step 1: Continuity
Turn the printer on with only the
fuser power disconnected.
Measure the voltage at connector
CN2 on the LVPS/HVPS. It should
match the line voltage.
• If line voltage is not present, see
"LVPS/HVPS service check" on
page 2-57 for more information.
Make sure the fuser thermistor is
correctly connected to the controller
board. If the problem persists,
disconnect the thermistor cable at
J15 and check for less than +5 V dc
on pin 1. Pin 2 should be ground.
• If line voltage is incorrect on pin 1,
see "Controller card service
check" on page 2-49
information.
Step 2: No continuity
Check the lamp cable for continuity.
• If correct, replace the fuser.
• If incorrect, replace the lamp
cable.
for more