Minolta magicolor 2300 Series, Service Manual

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(13) FATAL ERROR CODE 1AH: Incorrect fusing roller high temperature
(14) FATAL ERROR CODE 1BH: Disconnection at thermistor
<Remedy>
(15) FATAL ERROR CODE 21H: Malfunction of the OHP detecting sensor
<Remedy>
(16) FATAL ERROR CODE 29H: Malfunction of the EEPROM (memory counter error)
(17) FATAL ERROR CODE 2AH: Malfunction of the EEPROM (memory data error)
(18) FATAL ERROR CODE 2BH: Malfunction 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. T-1 PC3_REM 5-D
2 Replace PWB-A. - - -
3 Replace PWB-P. - - -
Electrical components for detection of the malfunction
EEPROM Master board (PWB-A)
Step Remedy
Reference
page
WARNING DIAGRAM
Control signal
Location(electrical com-
ponent)
1 Replace the EEPROM. - - -
2 Replace PWB-A. - - -