Service manual

CHAPTER 6 TROUBLESHOOTING
6-8
Error
Code
(Hex)
Error factor Check:
73
Drum unit is not mounted.
• Toner sensor
• Drum unit
74
Toner empty.
• Toner sensor
• Toner cartridge
75
In-casing temperature error.
• Thermistor ASSY
76
Heater harness disconnected or broken.
• Thermistor ASSY
• Halogen lamp
78
Heater thermistor harness disconnected or
broken.
• Thermistor ASSY
79
In-casing temperature sensor harness
disconnected or broken.
7A
Main motor does not synchronize with the
reference clock.
7B ASIC error on the main PCB.
7C Engine PCB error.
• Thermistor ASSY
• Main PCB
• Engine PCB
• Main motor
80
At the start of recording operation, the
controller detects that paper is smaller than
A4 size in length or width.
• Paper width sensor
• Paper size
81
Paper width sensor remains ON.
• Paper width sensor
82
Paper feeding error.
• Paper pick up roller
83
Recording paper jam.
(At the retry of paper pulling-in operation,
the registration sensor is not OFF.)
• Registration sensor
• Main PCB
84
Recording paper jam.
(The paper width sensor and/or registration
sensor has detected a paper jam.)
• Registration sensor actuator
• If the paper width sensor is
defective, replace the needle tube
& head flat cable ASSY.
• Main PCB
85 No paper cassette loaded.
86 No 2nd paper cassette loaded.
87
Main motor stop position error.
• Main motor
88
Recording paper jam.
(Even after paper pulling-in operation, the
registration sensor is still OFF.)
• Registration sensor actuator
• If the paper width sensor is
defective, replace the needle tube
& head flat cable ASSY.
• Main PCB
A1
Scanner unit or ink slot cover opened.
• Scanner open sensor
• Main PCB
• Scanner unit