Diagnostic information 2-119
7526
920.09—POST—Four toner sensor not connected error service check
6
1. Replace the fuser without resetting the
fuser count.
2. Enter Diagnostics mode (press and hold
buttons 3 and 6, turn on the MFP, and
release the buttons when the progress bar
displays.
3. Touch SENSOR TESTS.
4. Touch Dynamic Sensors.
5. Touch Fuser Exit.
6. Open the front door, and then the top
access cover.
7. Activate the fuser exit sensor.
Did the fuser exit sensor change from Open to
Closed?
Replace fuser and reset
the fuser count. See
“Fuser assembly
removal” on page 4-112.
Replace the system board.
See “System board
removal” on page 4-165.
Step Questions / actions Yes No
1 1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
3. Reseat the cable in connector JHVPS1.
Did 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 4-120.
Go to step 3.
Step Questions / actions Yes No
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