Diagnostic information 2-53
5025-2xx, 4xx
Transfer roll service check
Tray 1 sensor service check
Step Questions / actions Yes No
1 Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-11. Turn the printer on, and check the
cable at JHVPS1 connector on the controller
board without disconnecting it. Verify the
following values:
Are the values approximately correct?
Replace the HVPS. See
“High-voltage power
supply (HVPS) assembly
removal” on page 4-31.
If the problem persists, go to
step 2.
Replace the controller
board. See “Controller
board removal” on
page 4-19.
2
Turn the printer off, and remove the ITU. See
“Image transfer unit (ITU) removal” on
page 4-33. Check the three spring-loaded
contacts between the HVPS and the ITU
located at the left rear of the printer and above
the HVPS.
Are the contact dirty?.
Clean the contacts, and
reinstall the ITU.
Replace the ITU. See
“Image transfer unit (ITU)
removal” on page 4-33.
Step Questions / actions Yes No
1 When the printer is in Ready state, pull the
standard tray out. The display should indicate
Tray 1 Missing. Insert the tray.
Does the message remain on the display?
Go to step 2. Go to step 4.
2
Check the vertical wall (or web) at the right
rear of the tray for damage.
Is the tray damaged?
Replace the tray. Go to step 3.
3
Check for a dislodged sensor.
Is the sensor dislodged?
Replace the tray 1 sensor. Go to step 6.
4
Does the message Tray 1 Missing fail to
appear when the tray is pulled out?
Go to step 5. Problem resolved.
JHVPS1
Pin Value
7 +3.3 V dc
11 +3.3 V dc
13 +24 V dc
14 Ground
16 Ground
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