920.28, 920.29-Post (Power On Self Test) Option Tray Error Service Check; Mpf Paper Present Sensor Not Connected Service Check; 925.03, 925.05-Fan Error Service Check - Lexmark X746de Service Manual

920.27, 920.28, 920.29—POST (power on self test) option tray error service check
Step Questions / actions
Is the specified option the 550-sheet tray?
1
Is the specified option the special media tray?
2
Is the specified option the high-capacity input
3
tray (HCIT)?
920.32—MPF paper present sensor not connected service check
Step Questions / actions
Check the cable in connector JMPFPP1 for
1
proper connection, reseat cable.
Did the error clear?
1. Check the connection on the paper
2
present sensor side.
2. Check for damage and pinch points on the
cable.
3. Reseat cable.
Did this fix the problem?
Replace the MPF paper present sensor. See
3
"Multipurpose feeder (MPF) paper present
sensor" on page
Note: Before replacing a part, always verify
by connecting the part outside of the
machine.
Did the error clear?
925.01, 925.03, 925.05—Fan error service check
Step Questions / actions
1. Turn the printer off.
1
2. Remove the rear frame cover. See
frame cover removal" on page
3. 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?
Measure the continuity across all of the fuses
2
on the system board.
Are any of the fuses blown?
4-126.
"Rear
4-37.
Yes
Replace the 550-sheet tray
with a new 550-sheet tray
option.
Replace the special media
tray with a new special tray
option.
Replace the HCIT
controller board assembly.
See
"HCIT controller
board assembly
removal" on page 4-271
Yes
Problem resolved.
Problem resolved.
Problem resolved.
Yes
Replace the fan. See
"Cooling fan removal" on
page 4-73.
Replace the system board.
See
"System board
removal" on page 4-157.
7526
No
Go to step 2.
Go to step 3.
No
Go to step 2.
Go to step 3.
Replace the system board.
See
"System board
removal" on page 4-157.
No
Go to step 2.
Go to step 3.
Diagnostic information
2-131
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