Xerox Phaser 8400 Service Manual page 203

Electronics Troubleshooting Guide
Possible
Fault Cause Step-by-step Procedure
Error Printer has See section on Fault Codes for definition
messa detected a of the problem and the procedures
ge fault needed to solve problem
display condition
ed on
front
panel
LCD
LCD is Printer has See section on Fault Codes for definition
blank detected a of the problem and the procedures
and the fault needed to solve problem
PS and conditon but
PE can't display
indicato a message
rs are on the LCD
flashing
an error
code
Printer Printer is Inspect power cord
fails to not
power receiving
up: PS, proper AC
PE and
the
3.3V
indicato
r LEDs
are not
illumina
ted
Verify AC outlet voltage and current
capacities are within specifications
If necessary, move printer to a different
outlet and retest
Transient on Cycle power to printer to reset protective
AC line circuits in power supply
tripped
protective
circuitry in
printer
power
supply
4-58
Comment
The diagnostic
software tries to
display the root
cause of the
problem, but
occasionally, other
non-root causes are
reported
Some portion of the
chain of devices
used to drive the
LCD may be
defective since an
error message is not
displayed
Use caution with
hazardous voltages
when diagnosing AC
problems.
The 3.3V LED is
located INSIDE the
Electronics Module
and must be
observed through the
vent holes close to
the AC power switch.
* Possible solution to
problem *
* Possible solution to
problem *
Phaser 8400 Printer Service Manual