Transfer Roll Service Check; Tray (X) Sensor Service Check - Lexmark X548 Series Service Manual

7525-63x

Transfer roll service check

Step Questions / actions
Remove the ITU. See
1
(ITU) removal" on page
contacts between the HVPS and the ITU.
Clean the contacts and recheck.
Does the error reoccur?
Does the new ITU fix the problem?
2
Turn the printer off, and remove the rear
3
shield. See"Rear shield removal" on
page 4-7.
Turn the printer on, and check the cable at
JHVPS1 connector on the RIP board without
disconnecting it. Verify the following voltage
values:
Pin
7
10
11
13
14
16
Are the values approximately correct?

Tray (x) sensor service check

Step Questions / actions
When the printer is in Ready state, pull the
1
standard tray out. The display should indicate
Tray (x) Missing. Insert the tray.
Does the message remain on the display?
Check the vertical well at the right rear of the
2
tray for damage.
Is the tray damaged?
Check for a dislodged tray present sensor.
3
Is the sensor dislodged?
Does the message Tray (x) Missing fail to
4
appear when the tray is pulled out?
Service Manual
2-56
"Image transfer unit
4-43. Check the
JHVPS1
Voltage
+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)
removal" on page 4-43.
Go to step 2.
Problem resolved.
Replace the HVPS"High-
voltage power supply
(HVPS) with spring
assembly removal" on
page 4-40.
Yes
Go to step 2.
Replace the tray.
Replace the tray 1 sensor. If
the 650-sheet tray is
affected replace the
650-sheet drawer assembly.
If the 550-sheet assembly is
affected, replace the entire
550-sheet assembly.
Go to step 5.
No
Problem resolved.
Go to step 3.
Replace the RIP board. See
"RIP board removal" on
page 4-19.
No
Go to step 4.
Go to step 3.
Contact the next level of
support.
Problem resolved.
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