Diagnostic information 2-149
7526
Service tip: The printer has detected a problem with the system board, the operator panel assembly cable (part
of the top cover access assembly), or the operator panel assembly if POST does not complete. The printer emits
five beeps, and then sticks in a continuous pattern until the printer is turned off.
Operator panel display blank, five beeps, LED on
Service tip: The printer has detected a problem with the system board, the operator panel assembly cable (part
of the top cover access assembly), or the operator panel assembly if POST does not complete. The printer emits
five beeps, and then sticks in a continuous pattern until the printer is turned off.
Black display, stripes display, and distorted display
Step Questions / actions Yes No
1 Is the operator panel assembly cable properly
installed at system board JOPP1 and at the
operator panel assembly?
Go to step 2. Reinstall the cable.
2
Measure the voltage between JOPP1 pin 2
and ground on the system board.
Is the voltage approximately +5 V dc?
Go to step 3. Replace the system board.
See “System board
removal” on page 4-157.
3
Check continuity of the operator panel
assembly cable.
Is there continuity?
Replace the operator panel
assembly. See “Operator
panel assembly removal”
on page 4-27.
Replace the top cover
access assembly. See
“Top access cover
assembly removal” on
page 4-40.
Step Questions / actions Yes No
1 Check for ground between JOPP1 pin 4 and
ground.
Is the voltage approximately 0 V dc?
Replace the operator panel
assembly. See “Operator
panel assembly removal”
on page 4-27.
Go to step 2.
2
Check the operator panel assembly cable.
Is the cable damaged?
Replace the top cover
access assembly. See
“Top access cover
assembly removal” on
page 4-40.
Replace the system board.
See “System board
removal” on page 4-157.
Step Questions / actions Yes No
1 1. Turn off the printer.
2. Open the rear cover.
3. Reseat the UICC cable (J2) on the system
board.
4. Check the J2 connector on the system
board for any damage.
Is the connector damaged?
Replace the system board.
See “System board
removal” on page 4-157.
Go to step 2.
2
1. Turn off the printer.
2. Disconnect the J2 UICC cable.
3. Connect a new top access cover
assembly from outside of the machine for
verification.
Does the problem persist?
Return to the od top access
cover assembly, then go to
step 6.
Return to the old top
access cover assembly,
then go to step 3.
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