2-104 Service Manual
5026
920.09—POST (power-on self test)—Four toner sensors not connected error service
check
6
1. Replace the fuse without resetting the
fuser count.
2. Bring the printer up in Diagnostics Menu
(turn off the printer, press and hold
buttons 3 and 6, then turn on the printer).
3. Navigate to SENSOR TESTS > Dynamic
Sensors > Fuser Exit.
4. Open the front door, and then the top
access cover.
5. Activate the fuser exit sensor.
Did the fuser exit sensor change from Open to
Closed?
Replace fuser and reset
the fuser count. See
“Fuser removal” on
page 4-118.
Replace the system board.
See “System board
removal” on page 4-163.
Step Questions / actions Yes No
1 1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-47.
3. Reseat the cable in connector JHVPS1.
Does the error clear?
Problem resolved. Go to step 2.
2
Check the HVPS cable in connector JHVPS1
for pinch points and any other damage to the
cable or connector.
Is the cable damaged?
Replace the HVPS cable.
See “High-voltage power
supply (HVPS) cable
removal” on page 4-125.
Go to step 3.
Step Questions / actions Yes No
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