HP LaserJet Enterprise 500 Maintenance Manual - Page 55

Power Supply Voltage.

Page 55 highlights

List of Messages Message PRINTER HOT PROTECTED INSTR* PWR SUPP VOLT* RESTORING BOOT CODE RIB INVLD CMD* Table 2. Message List Explanation Solution 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. CMX 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 CMX controller board. Record the message and return it with defective CMX board. Protected Instruction. Firmware error on the CMX 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 CMX controller board. Record the message and return it with defective CMX board. Power Supply Voltage. The power supply has failed. Replace the power supply board. Normal download initialization message. No action required. Ribbon Invalid Command. Firmware error on the CMX 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 CMX controller board. Record the message and return it with defective CMX board. 55

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List of Messages
55
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.
CMX 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 CMX controller board.
Record the message and return it
with defective CMX board.
PROTECTED INSTR*
Protected Instruction. Firmware
error on the CMX 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
CMX controller board. Record the
message and return it with defective
CMX board.
PWR SUPP VOLT*
Power Supply Voltage. The
power supply has failed.
Replace the power supply board.
RESTORING
BOOT CODE
Normal download initialization
message.
No action required.
RIB INVLD CMD*
Ribbon Invalid Command.
Firmware error on the CMX
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
CMX controller board. Record the
message and return it with defective
CMX board.
Table 2. Message List
Message
Explanation
Solution