Lexmark T632 Service Manual - Page 104

Operator panel service check

Page 104 highlights

4060-xxx Operator panel service check Operator panel buttons service check Before continuing with this service check do the "Button Test" on page 3-8. FRU 1 Operator panel assembly 2 Operator panel assembly (no buttons work) 3 System board Action If any button fails the Button Test, replace the operator panel assembly. If no buttons work, replace the operator panel assembly. Disconnect the operator panel cable from J15 on the system board and measure the voltage at J15-5. The voltage should measure approximately +5 V dc. If incorrect, replace the system board. If incorrect, replace the cable. If correct, replace the operator panel assembly. Operator panel display service check Service tip: The printer has detected a problem with the system board, operator panel cable or operator panel assembly if POST does not complete and the printer emits 5 beeps and stops in a continuous pattern until the printer is turned off. The operator panel cable is an individual cable on some printers and a combination cable assembly with the cover switch cable on later models. Note: If the operator panel is operating properly except for a pel or a few pels missing or broken, run the "LCD Test" on page 3-8 from the hardware tests before continuing with this service check. FRU 1 Operator panel cable 2 Operator panel display blank, 5 beeps, LED off 3 Operator panel display blank, 5 beeps, LED on 4 Operator panel all diamonds, no beeps 5 Operator panel all diamonds, 5 beeps Action Check for proper installation of the cable at the system board (J15) and at the operator panel. Check the continuity of the operator panel cable. If incorrect, replace the cable. Check for correct installation of the operator panel cable at J15 on the system board. If incorrect, reinstall the cable properly. If correct, measure the voltage at J15-2 on the system board. The voltage should measure approximately +5 V dc. If incorrect, replace the system board. If correct, check continuity of the operator panel cable. If the continuity is incorrect, replace the cable. If the continuity is correct, replace the operator panel assembly. Check for ground between J15-4 and ground. If correct, replace the operator panel assembly. If incorrect, replace the system board. Make sure a card is not plugged in backward. This condition causes the printer to fail POST, displaying all diamonds on the operator panel with no beeps. Check the voltage at Pin J15-1 and J15-3. The voltage measures approximately +5 V dc. If incorrect, replace the FRUs in the following order: • Operator panel assembly • System board 2-70 Service Manual

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2-70
Service Manual
4060-
xxx
Operator panel service check
Operator panel buttons service check
Before continuing with this service check do the
“Button Test” on page 3-8
.
Operator panel display service check
Service tip: The printer has detected a problem with the system board, operator panel cable or
operator panel assembly if POST does not complete and the printer emits 5 beeps and stops in a
continuous pattern until the printer is turned off. The operator panel cable is an individual cable on
some printers and a combination cable assembly with the cover switch cable on later models.
Note:
If the operator panel is operating properly except for a pel or a few pels missing or broken, run
the
“LCD Test” on page 3-8
from the hardware tests before continuing with this service check.
FRU
Action
1
Operator panel assembly
If any button fails the Button Test, replace the operator panel
assembly.
2
Operator panel assembly
(no buttons work)
If no buttons work, replace the operator panel assembly.
3
System board
Disconnect the operator panel cable from J15 on the system board
and measure the voltage at J15-5. The voltage should measure
approximately +5 V dc. If incorrect, replace the system board. If
incorrect, replace the cable. If correct, replace the operator panel
assembly.
FRU
Action
1
Operator panel cable
Check for proper installation of the cable at the system board (J15)
and at the operator panel. Check the continuity of the operator panel
cable. If incorrect, replace the cable.
2
Operator panel display
blank, 5 beeps, LED off
Check for correct installation of the operator panel cable at J15 on
the system board. If incorrect, reinstall the cable properly. If correct,
measure the voltage at J15-2 on the system board. The voltage
should measure approximately +5 V dc. If incorrect, replace the
system board. If correct, check continuity of the operator panel cable.
If the continuity is incorrect, replace the cable. If the continuity is
correct, replace the operator panel assembly.
3
Operator panel display
blank, 5 beeps, LED on
Check for ground between J15-4 and ground. If correct, replace the
operator panel assembly. If incorrect, replace the system board.
4
Operator panel all
diamonds, no beeps
Make sure a card is not plugged in backward. This condition causes
the printer to fail POST, displaying all diamonds on the operator panel
with no beeps.
5
Operator panel all
diamonds, 5 beeps
Check the voltage at Pin J15-1 and J15-3. The voltage measures
approximately +5 V dc. If incorrect, replace the FRUs in the following
order:
Operator panel assembly
System board