Erratic Printer Operation Service Check - Lexmark W812 Service Manual

4022-XXX
Step Actions and Questions
7 LVPS 24V CHECK
Check for DC voltage between FG and the following jack
locations with cables plugging into each jack removed:
J101-5
J103-1
J106-1
Is there approximately 24V between each of the pins and
FG?
8 RIP CARD ASSEMBLY CHECK
Switch off the power switch. Reattach all cables removed in
prior steps. Remove the RIP card assembly. Turn on the power
switch.
Does the printer go into warm up (does the cooling fan
turn on)?

Erratic Printer Operation Service Check

The printer may have problems that are not identified by displayed error codes or
messages. Problems may range from incomplete or garbled LCD text to intermittent
power shutdowns.
Step Actions and Questions
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?
2 AC POWER CHECK
Unplug the printer AC power cord from the AC electrical 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 electrical outlet meet
printer specifications and does the voltage remain
relatively stable without wide fluctuations?
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?
4 SOFTWARE RELOAD
Reload print driver software.
Monitor printer operation.
Does the printer display erratic operation?
Yes No
Go to step 8 Replace the
LVPS.
Replace the
RIP Card
Assembly.
Yes No
Go to step 2 Move the
printer to an
environment
that meets
printer
specifications
Go to step 3 Have an
electrician
troubleshoot
the AC line
Go to step 4 Return all
settings to
factory default
values
Go to step 5 Problem
solved
Diagnostic Information
2-15