Sharp AL-1661CS Service Manual page 144

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code code
E1 16 Content IMC DIMM memory read/write check error
Detail An installation error occurs in the IMC memory
module.
An error occurs during access to the IMC
memory.
Cause Improper installation of the IMC memory
module.
IMC memory module abnormality
IMC memory contact abnormality
IMC abnormality.
Check Check installation of the memory module.
and Replace the memory module.
remedy Replace the MCU PWB with a new one.
81 Content IMC communication interface error (parity)
Detail A parity 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
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
Details of trouble
AL-1661CS TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES 10 - 68
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code code
E7 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
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.
F6 10 Content FAX board trouble
Detail Communication trouble between MCU and FAX
control PWB
Cause FAX control PWB connector disconnection
Defective harness between FAX control PWB
and MCU PWB
Motherboard connector pin breakage
FAX control PWB ROM error/Data error
IC on FAX PWB causes abnormality
Check Check connector/harness of FAX control PWB
and and MCU PWB.
remedy Check the grounding of the copier.
Check FAX control PWB ROM.
Replace the FAX 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.
Details of trouble