Lexmark T62X, Service Manual

Page: 115 / 430

Diagnostic Information
2-87
4069-5XX/7XX
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 3-14
from the hardware tests before continuing with this diagnostic
service check.
2 System Board
(No buttons work) Check the voltage at J16-2. The
voltage measures approximately
+5 V dc. If incorrect, replace the
system board. If correct, check the
continuity of the operator panel
cable. 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 (J16) 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 the voltage at J16 on the
system board. It measures
approxi5 V dc. If incorrect,
replace the system board. If correct,
replace the operator panel assembly.
3 Operator Panel Display
blank, 5 beeps, LED On Check for continuity between J16-4
and ground. If correct, replace the
operator panel assembly. If incorrect,
replace the system board.
4 Operator Panel All
Diamonds, no beeps Replace system board.
FRU Action