AL-1651CS TEST COMMAND, TROUBLE CODES 10 - 28
E1
82
Content IMC communication interface error (Overrun)
Detail
An overrun error occurs in communication
between the CPU and the IMC.
Cause
IMC memory defect/data abnormality.
Check
and
remedy
Check the memory of the IMC.
Replace the MCU PWB with new one.
84
Content IMC communication interface error (Framing)
Detail
A framing error occurs in communication
between the CPU and the IMC.
Cause
IMC memory defect/data abnormality.
Check
and
remedy
Check the memory of the IMC.
E7
02
Content LSU trouble
Detail
The BD signal from the LSU cannot be detected
in a certain cycle. (Always OFF or always ON)
Cause
LSU connector or LSU harness defect or
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.
Check
and
remedy
Check connection of the LSU connector.
Execute TC 61-03 to check the LSU operations.
Check that the polygon motor rotates normally.
Check that the laser emitting diode generates
laser beams.
Replace the LSU unit.
Replace the MCU PWB.
10
Content Shading trouble (Black correction)
Detail
The CCD black scan level is abnormal when the
shading.
Cause
Improper connection of the CCD unit flat cable
CCD unit abnormality
MCU PWB abnormality
Check
and
remedy
Check connection of the CCD unit flat cable.
Check the CCD unit.
11
Content Shading trouble (White correction)
Detail
The CCD white scan level is abnormal when the
shading.
Cause
Improper connection of the CCD unit flat cable
Dirt on the mirror, the lens, and the reference
white plate
Copy lamp lighting abnormality
CCD unit abnormality
MCU PWB abnormality
(When occurred in the SPF scan position.)
Improper installation of the mirror unit
Check
and
remedy
Clean the mirror, lens, and the reference white
plate.
Check the light quantity and lighting status of
the copy lamp (TC 05-03).
Check the MCU PWB.
16
Content Abnormal laser output
Detail
When the laser output is stopped, HSYNC is
detected.
Cause
Laser abnormality
MCU PWB abnormality.
Check
and
remedy
Check the laser emitting diode operation.
Replace the MCU PWB.
Main
code
Sub
code
Details of trouble
F5
02
Content Copy lamp lighting abnormality
Detail
The copy lamp does not turn on.
Cause
Copy lamp abnormality
Copy lamp harness abnormality
CCD PWB harness abnormality.
Check
and
remedy
Use TC 5-3 to check the copy lamp operations.
When the copy lamp lights up.
Check the harness and the connector between
the CCD unit and the MCU PWB.
When the copy lamp does not light up.
Check the harness and the connector between
the copy lamp unit and the MCU PWB.
Replace the copy lamp unit.
Replace the MCU PWB.
H2
00
Content Thermistor open
Detail
The thermistor is open.
The fusing unit is not installed.
Cause
Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection
The fusing unit is not installed.
Check
and
remedy
Check the harness and the connector between
the thermistor and the PWB.
Use TC 14 to clear the self diagnostic display.
H3
00
Content Heat roller high temperature detection
Detail
The fusing temperature exceeds 240°C.
Cause
Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection.
Check
and
remedy
Use TC 5-02 to check the heater lamp blinking
operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the control
PWB.
When the lamp keeps ON.
Check the power PWB and the lamp control
circuit on the MCU PWB.
Use TC 14 to clear the self diagnostic display.
H4
00
Content Heat roller low temperature detection
Detail
The fusing temperature does not reach 185°C
within 27 sec of turning on the power, or the
fusing temperature keeps at 140°C.
Cause
Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
Control PWB abnormality
Check
and
remedy
Use TC 5-02 to check the heater lamp blinking
operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the control
PWB.
When the lamp does not light up.
Check for disconnection of the heater lamp and
the thermostat. Check the interlock switch.
Check the power PWB and the lamp control
circuit on the MCU PWB.
Use TC 14 to clear the self diagnostic display.
Main
code
Sub
code
Details of trouble
