2-56 Service Manual
4025-XXX
Erratic Printer Operation
The printer has a variety of problems that are not identified by displayed error codes or
messages. Problems may range from incomplete or garbled LCD text to intermittent
power shutdowns.
10 OPTION ISOLATION
Remove all options, such as the Duplex Unit or the High
Capacity Feeder, from the base printer.
Do the Operator Panel LEDs light up and does the printer
go into warm-up?
Replace the
options one
by one until
the printer
becomes
inoperative
again.
Troubleshoot
or replace the
problem
option.
Go to step 11
11 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• Interlock switches and circuits
Step Actions and Questions Yes No
1 PRINTER OPERATING ENVIRONMENT CHECK
Check the printer room environment, such as temperature,
humidity, and space requirements
Does the printer room environment meet printer
specifications?
Go to step 2 Move the
printer to an
environment
that meets
printer
specifications
2 AC POWER CHECK
Unplug the printer AC power cord from the AC wall outlet.
Use a digital multimeter to monitor the voltage at the AC wall
outlet.
Monitor the AC voltage for 30 minutes or longer.
Does the voltage at the AC wall outlet meet printer
specifications and does the voltage remain relatively
stable without wide fluctuations?
Go to step 3 Have an
electrician
troubleshoot
the AC line
3 NVRAM SETTINGS CHECK
If applicable to your printer configuration, check the NVRAM
settings to make sure they are all set to the recommended
factory default values.
Are the NVRAM settings set to the factory default values?
Go to step 4 Return all
settings to
factory default
values
Step Actions and Questions Yes No
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