HP LaserJet 6p/mp Service Manual - Page 125

Service and error messages , pattern in the lights. The error will only be displayed as long as

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Service and error messages Service errors prevent further printer operation until some action is taken. When there is a service error, all of the lights will turn on in a steady state. Press and hold the Control Panel Button to see a pattern in the lights. (The error will only be displayed as long as this button is pressed.) Use Table 7-4, "Service and Error Messages," to identify what type of service error has occurred. Table 7-3 Service and error messages ROM/RAM Error. An error was 1. Power-cycle the printer by found with the ROM or RAM. The unplugging the printer and plugging printer believes that the ROM is it back in. If this doesn't clear the corrupted or an error has been found error: in the RAM. 2. Unplug the printer, remove any optional memory, then power the printer back on. If the message clears, replace the memory card. 3. Replace the Formatter PCA. Fuser Error. This indicates a fusing 1. Unplug the printer for 10 minutes assembly malfunction. or more. Note: Chronic fuser failures or fuser 2. Verify that the fuser connector is overheating or both are indicators of firmly seated in J102 of the DC an uninterruptible power supply or Controller PCA and that the battery backup being used with the thermistor connector (left of fusing printer. Uninterruptible power assembly) is seated into both the supplies (UPS) should not be used printer chassis and J206 of the DC with the printer. Controller PCA. 3. Remove the connector from J102 of the DC Controller (See Figure 614). Measure the resistance between pins one and two of the cable. (This procedure will measure the continuity of the ceramic heating element.) Normal resistance is 30 ohms +/- 10 ohms. If no resistance is measured, replace the heating element. 4. Remove the thermistor (temperature feedback) connector (See Figure 7-3). Measure the resistance between pins one and two. Normal resistance is 440K ohms +/- 30K at 20 degrees C. If the resistance is not measured replace the heating element 5. If the resistance readings are correct, yet the error persists, replace the DC Controller. EN Printer error troubleshooting 123

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EN
Printer error troubleshooting
123
Service and error messages
Service errors prevent further printer operation until some action is
taken. When there is a service error, all of the lights will turn on in a
steady state.
Press and hold
the
Control Panel Button
to see a
pattern in the lights. (The error will only be displayed as long as this
button is pressed.) Use Table 7-4, “Service and Error Messages,” to
identify what type of service error has occurred.
Table 7-3
Service and error messages
ROM/RAM Error
. An error was
found with the ROM or RAM. The
printer believes that the ROM is
corrupted or an error has been found
in the RAM.
1. Power-cycle the printer by
unplugging the printer and plugging
it back in. If this doesn’t clear the
error:
2. Unplug the printer, remove any
optional memory, then power the
printer back on. If the message
clears, replace the memory card.
3. Replace the Formatter PCA.
Fuser Error
. This indicates a fusing
assembly malfunction.
Note
:
Chronic fuser failures or fuser
overheating or both are indicators of
an uninterruptible power supply or
battery backup being used with the
printer. Uninterruptible power
supplies (UPS) should not be used
with the printer.
1. Unplug the printer for 10 minutes
or more.
2. Verify that the fuser connector is
firmly seated in J102 of the DC
Controller PCA and that the
thermistor connector (left of fusing
assembly) is seated into both the
printer chassis and J206 of the DC
Controller PCA.
3. Remove the connector from J102
of the DC Controller (See Figure 6-
14). Measure the resistance
between pins one and two of the
cable. (This procedure will measure
the continuity of the ceramic heating
element.) Normal resistance is 30
ohms +/- 10 ohms. If no resistance is
measured, replace the heating
element.
4. Remove the thermistor
(temperature feedback) connector
(See Figure 7-3). Measure the
resistance between pins one and
two. Normal resistance is 440K
ohms +/- 30K at 20 degrees C. If the
resistance is not measured replace
the heating element
5. If the resistance readings are
correct, yet the error persists,
replace the DC Controller.