Service manual

7-17
CHAPTER 7 TROUBLESHOOTING PROCEDURES
Error DescriptionMessage Cause Solution
Check to see if the
Duplex is properly
installed.
Check to see if the FAN is
properly connected.
Replace the FAN.
Check to see if the K-ID is
properly installed.
Replace the K-ID.
Replace the K-ID motor.
Check to see if the fuser
unit is properly installed.
Replace the fuser unit.
Replace the fuser motor.
Power OFF
Replace the fuser unit.
Turn on the printer again.
Replace the PU board
(PRN).
Turn on the printer again
and redownload the data
(during usual printer
operation, the
downloading is not
performed and the error
does not occur).
Turn on the printer again.
Replace the PU board
(PRN).
Turn on the printer again.
Replace the PU board
(PRN).
Reinstall the assy
properly.
Replace the
SP1 /TBH
board.
Replace the PU board
(PRN).
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
FAN error inside the Duplex.
Is the error issued again when the
power is turned on again?
The black image drum (K-ID)
does not rotate properly.
Is the error message issued again
when the power is turned on?
The fuser unit does not rotate
properly.
Does the error reoccur after power
cycling?
Media has clung to the fuser.
Does error reoccur?
After PU data (PU firmware, custom
media data and LED head
adjustment data) downloading, a
CRC check error was detected.
Does error reoccur?
Does error reoccur?
Is the CU assy installed properly?
Does the printer recover from the
error by replacing the
SP1 /TBH
board.
Duplex FANO Alarm
Detection
Black Image
Drum Lock Error
Fuser MotorLock
Error
Error by media
clinging to the fuser
PU board SRAM
error
A PU download
data CRC check
error.
PU board Flash
ROM hash check
error
PU firmware went
haywire.
An error in a PU-CU
interface.
Service call
918:Error
Power off/on
923:Error
Service call
928:Error
Service call
980:Error
SDRAM ERROR
XXXXXXXXXXXXXXXX
CRC CHECK NG
LOADER VERSION
XX XX
WDT ERROR
COMMUNICATION
ERROR
Service Call Error (7/7)
Note) SERVICE CALL Error 168, Error 171 and Error 175 are likely issued when the printer is
cool at 0 deg.C or lower.Therefore, if the printer is cool, turn on the power again after it
has warmed up.