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Chapter 3 Troubleshooting Display Messages
PRINTER HOT
This message indicates
internal temperatures over
60° Celsius (140°
Fahrenheit). Print jobs will
not create such
temperatures, so
immediately determine that
the fans are operating and
that all air vents are
unobstructed. It is crucial
that the exhaust vents on the
floor of the cabinet remain
unblocked, since hot air from
inside the printer is vented
through the cabinet floor.
Nothing must be stored
under the printer. Then
check the operating
environment. A severe
environment is one with an
ambient temperature at or
above 40° Celsius (104°
Fahrenheit) or is dirty
enough to create blockage
of the cabinet fan vents. The
printer must never be run at
ambient temperatures
greater than 40° Celsius
(104° Fahrenheit). If the
printer is located in such an
environment, relocate it to a
cooler, cleaner area.
1. controller board sensors report
high temperatures on the board.
Inspect printer environment for
severity. Advise the user to move
the printer to cooler, cleaner
location.
2. Power off the printer. Remove the
paper path or pedestal top cover.
Check that all fan cables are
connected.
3. Inspect vents and fan airways for
obstructions. Look underneath
cabinet models for items blocking
the cabinet exhaust vents.
Remove any obstructions from
vents and airways.
4. Install paper path or pedestal top
cover. Load paper. Power on the
printer. Run the “All Black” print
test for 1/4 page. If the message
appears, replace the controller
board. Record the message and
return it with defective board.
PROTECTED INSTR*
Protected Instruction.
Firmware error on the
controller board.
1. Cycle power. Run the print job
again. If the message appears,
download the emulation software
again.
2. Cycle power. Run the print job
again. If the message appears,
replace the controller board.
Record the message and return it
with defective board.
PWR SUPP VOLT*
Power Supply Voltage. The
power supply has failed.
Replace the power supply board.
Table 2. Message List
Message Explanation Solution
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