Sharp AL-1651CS Service Manual page 98

Main Sub
code code
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 Check the memory of the IMC.
and Replace the MCU PWB with new one.
remedy
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 Check the memory of the IMC.
and
remedy
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 Check connection of the LSU connector.
and Execute TC 61-03 to check the LSU operations.
remedy 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 Check connection of the CCD unit flat cable.
and Check the CCD unit.
remedy
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 Clean the mirror, lens, and the reference white
and plate.
remedy 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 Check the laser emitting diode operation.
and Replace the MCU PWB.
remedy
Details of trouble
AL-1651CS TEST COMMAND, TROUBLE CODES 10 - 28
Main Sub
code code
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 Use TC 5-3 to check the copy lamp operations.
and When the copy lamp lights up.
remedy 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 Check the harness and the connector between
and the thermistor and the PWB.
remedy 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 Use TC 5-02 to check the heater lamp blinking
and operation.
remedy 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 Use TC 5-02 to check the heater lamp blinking
and operation.
remedy 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.
Details of trouble