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2-106 Service Manual
Operator panel service check
Note: The operator panel board is a separate FRU and is also part of the upper front cover FRU
Warning: When replacing any one of the following components:
• Operator panel assembly (or upper front cover)
• System board assembly
• Interconnect card assembly
Only replace one component at a time. Replace the required component and perform a POR before replacing a
second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never
replace two or more of the components listed above without a POR after installing each one or the printer will be
rendered inoperable.
Warning: Never install and remove components listed above as a method of troubleshooting components.
Once a component has been installed in a printer, it can not be used in another printer. It must be
returned to the manufacturer.
Before continuing with this service check perform the “Button Test” on page 3-7.
One or more operator panel buttons fail
No buttons work
FRU Action
1 Operator panel buttons kit
Operator panel board
If any button fails the Button Test, check the failing button or buttons
and associated parts. Repair using the button kit. See “Operator
panel buttons removal” on page 4-67. If the problem remains,
replace the operator panel board (see “Operator panel board
removal” on page 4-66. If a 950.xx error code is displayed after
replacing the operator panel, go to “950.00 through 950.29 EPROM
mismatch failure” on page 2-77.
2
System board
Operator panel board
Upper front cover hinge
assembly
Disconnect the operator panel cable from J13 on the system board
and measure the voltage at J13-5. The voltage should measure
approximately +3.3 V dc. If incorrect, replace the system board. See
“System board and inner shield removal” on page 4-76. If
correct, replace the operator panel board. See “Operator panel
board removal” on page 4-66. If this does not fix the problem,
check the operator panel cable. If a problem is found, replace the
upper front cover hinge assembly. See “Upper front cover hinge
assembly removal” on page 4-78.
FRU Action
1 Operator panel board If none of the buttons work, replace the operator panel board (see
“Operator panel board removal” on page 4-66. If a 950.xx error
code is displayed after replacing the operator panel, go to “950.00
through 950.29 EPROM mismatch failure” on page 2-77.