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(13) FATAL ERROR CODE 1AH / SERVICE CALL 1A FUSER UNIT: Incorrect fusing
roller high temperature
(14) FATAL ERROR CODE 1BH / SERVICE CALL 1B FUSER UNIT: Disconnection at
thermistor
<Remedy>
(15) FATAL ERROR CODE 21H / SERVICE CALL 21 TRANS DET SENS: Malfunction
of the OHP detecting sensor
<Remedy>
(16) FATAL ERROR CODE 29H / SERVICE CALL 29 MEM MALF COUNTER: Malfunc-
tion of the EEPROM (memory counter error)
(17) FATAL ERROR CODE 2AH / SERVICE CALL 2A MEM MALF DATA: Malfunction
of the EEPROM (memory data error)
(18) FATAL ERROR CODE 2BH / SERVICE CALL 2B MEM MALF ACCESS: Malfunc-
tion of the EEPROM (memory access error)
(19) FATAL ERROR CODE 2CH: Malfunction of the EEPROM (memory recognition
error)
<Remedy>
Electrical components for detection of the malfunction
Thermistor (TH1)
Master board (PWB-A)
Controller control board (PWB-P)
Step Check Result Remedy
WARNING DIAGRAM
Control
signal
Location(electrical
component)
1
Is there a short circuit at TH1?
(between CN18-1 and -2 on
the thermistor)
YES
Clean TH1.
HEATER 2-D
Replace the fusing
unit.
NO
Replace PU.
Replace PWB-A
Electrical components for detection of the malfunction
OHP detecting sensor (PC3A)
Master board (PWB-A)
Controller control board (PWB-P)
Step Remedy
Reference
page
WARNING DIAGRAM
Control signal
Location(electrical
component)
1 Check PC3A operation. 149 PC3_REM 5-D
2 Replace PWB-A. - - -
3 Replace PWB-P. - - -
Electrical components for detection of the malfunction
EEPROM Master board (PWB-A)
165


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