Diagnostic information 2-117
5026
920.27, 920.28, 920.29—POST (power on self test) option tray error service check
920.32—MPF paper present sensor not connected service check
925.01, 925.03, 925.05—Fan error service check
Step Questions / actions Yes No
1 Is the specified option the 550-sheet tray? Replace the 550-sheet tray
with a new 550-sheet tray
option.
Go to step 2.
2
Is the specified option the special media tray? Replace the special media
tray with a new special tray
option.
Go to step 3.
3
Is the specified option the high-capacity input
tray (HCIT)?
Replace the HCIT
controller board assembly.
See “HCIT controller
board assembly
removal” on page 4-207.
Step Questions / actions Yes No
1 Check the cable in connector JMPFPP1 for
proper connection, reseat cable.
Did the error clear?
Problem resolved. Go to step 2.
2
1. Check the connection on the paper
present sensor side.
2. Check for damage and pinch points on the
cable.
3. Reseat cable.
Did this fix the problem?
Problem resolved. Go to step 3.
3
Replace the MPF paper present sensor. See
“Multipurpose feeder (MPF) paper present
sensor” on page 4-137.
Note: Before replacing a part, always verify
by connecting the part outside of the
machine.
Did the error clear?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-163.
Step Questions / actions Yes No
1 Turn the printer off, and then remove the rear
frame cover. See “Rear frame cover
removal” on page 4-47.
Check the cable in connector JFAN1 for
proper connection to the system board, for
pinch points, and for any other damage to the
cable or the connector.
Is the cable damaged?
Replace the fan. See
“Cooling fan removal” on
page 4-93.
Go to step 2.
2
Measure the continuity across all of the fuses
on the system board.
Are any of the fuses blown?
Replace the system board.
See “System board
removal” on page 4-163.
Go to step 3.
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