920.28, 920.29-Post (Power On Self Test) Service Check - Lexmark X734de Service Manual

7526
Step Questions / actions
1. Disconnect the cable in connector JFDS1.
3
2. Connect the new top cover sensor.
3. Bring the printer up in the Diagnostics
menu (turn off the printer, press and hold
3 and 6, turn on the printer.)
4. Touch Sensor Tests.
5. Touch Dynamic Sensors.
6. Touch Top Door.
7. Activate the top cover sensor by pressing
the flag as shown.
Does the display on the touchscreen change
from Open to Closed?
920.27, 920.28, 920.29—POST (power on self test) 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)?
Service Manual
2-128
Yes
Replace the top cover
sensor.
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 4-295
No
Replace the system board.
See
"System board
removal" on page 4-165.
No
Go to step 2.
Go to step 3.
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