2-54 Service Manual
5025-2xx, 4xx
Transfer roll service check
Tray (x) sensor service check
Step Questions / actions Yes No
1 Remove the ITU. See “Image transfer unit
(ITU) removal” on page 4-44. Check the
contacts between the HVPS and the ITU.
Clean the contacts and recheck.
Does the error recur?
Replace the ITU. See
“Image transfer unit (ITU)
removal” on page 4-44.
Go to step 2.
Problem resolved.
2
Does the new ITU fix the problem Problem resolved. Go to step 3.
3
Turn the printer off, and remove the rear
shield. See “Top cover assembly removal”
on page 4-13.
Turn the printer on, and check the cable at
JHVPS1 connector on the controller board
without disconnecting it.
Verify the following voltage values:
Are the values approximately correct?
Replace the HVPS. See
“High-voltage power
supply (HVPS) assembly
removal” on page 4-38.
Replace the controller
board. See “Controller
board removal” on
page 4-20.
Step Questions / actions Yes No
1 When the printer is in Ready state, pull the
standard tray out. The display should indicate
Tray (x) Missing. Reinsert the tray.
Does the message remain on the display?
Go to step 2. Go to step 4.
JHVPS1
Pin Voltage
7 +3.3 V dc
10 +3.3 V dc
11 +3.3 V dc
13 +24 V dc
14 Ground
16 Ground
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