Transfer Roll Service Check - Lexmark X543 Service Manual

Transfer roll service check

Step Questions / actions
1 Remove the ITU. See
(ITU)" on page
between the HVPS and the ITU. Clean the
contacts and recheck.
Does the error reoccur?.
2 Does the new ITU fix the problem
3 Turn the printer off, and remove the rear shield.
See"Rear shield removal" on page
. Turn the printer on, and check the cable at
JHVPS1 connector on the controller board
without disconnecting it. Verify the following
voltage values:
Pin
10
11
13
14
16
Are the values approximately correct?
"Image transfer unit
4-35. Check the contacts
4-7.
JHVPS1
Voltage
7 +3.3 V dc
+3.3 V dc
+3.3 V dc
+24 V dc
Ground
Ground
Yes
Replace the ITU. See
"Image transfer unit (ITU)"
on page 4-35.
Go to step 2.
Problem resolved.
Replace the HVPS"High-
voltage power supply
(HVPS) assembly
removal" on page 4-31.
7525-xxx
No
Problem resolved.
Go to step 3.
Replace the controller
board. See "Controller
board removal" on
page 4-18.
2-59
Diagnostic information