Sharp AL-1611 Service Manual page 53

Main Sub
code code
E7 03 Check and Improper connection of the LSU connec-
remedy tor
Check the polygon motor operation with
SIM 25-10.
Check printing with SIM64-1.
Check laser emission of laser emitting
diode.
Check the LSU unit.
Check the MCU PWB.
04 Content CCD white level trouble
Detail CCD white reference level which is read
during the copy lamp lighting is abnor-
mal.
Cause Flat cable installation failure to CCD unit
Dirt on the mirror, lens, and reference
white plate
Copy lamp lighting failure
CCD unit installation failure
CCD unit abnormality
MCU PWB abnormality
Check and remedy Clean the mirror, the
lens, and the reference white plate.
Check the copy lamp (SIM 5-3) ON.
Carriage unit position failure
Check the sub scanning direction distor-
tion adjustment (F rail height).
CCD unit check
MCU PWB check
05 Content CCD black level trouble
Detail CCD black level which is read while the
copy lamp is off is abnormal.
Cause Flat cable installation failure
CCD unit abnormality
MCU PWB abnormality
Check and Check flat cable installation to the CCD
remedy unit.
CCD unit check
MCU PWB check
F1 06 Content Shifter motor trouble
Details The home position is not detected within
1 sec after shifter motor drive.
Cause The shifter home position sensor is
defective.
The shifter motor is defective.
The shifter motor periphery circuit is
defective.
The condition of the MCU PWB JP4 is
wrong.
The assembly of the shifter motor unit is
improper.
Check and Check the shifter operation by means of
remedy SIM3-2 and 3.
Check the harnesses and connectors.
Check whether the shifter unit is properly
assembled.
Check whether the condition of the MCU
PWB JP4 is correct.
F2 04 Content CRUM data read trouble
Detail Communication error between CRUM
PWB and MCU PWB
Cause CRUM PWB data error
MCU PWB error
MCU PWB EEPROM error
Disconnection between CRUM (toner
cartridge) and MCU PWB
Detail of trouble
AL-1611/AL-1622 TROUBLE CODE LIST
10 – 3
Main Sub
code code
F2 04 Check and Replace the toner cartridge.
remedy Replace MCU PWB.
Replace MCU PWB EEPROM
Check and fix connection between
CRUM (toner cartridge) and MCU PWB.
F5 02 Content Copy lamp error
Detail Copy lamp voltage detection error
Cause Power unit trouble Copy lamp trouble
Inverter trouble MCU PWB trouble
Check and Replace the power unit.
remedy Check the copy lamp ON with SIM 5-3.
Replace the copy lamp.
Replace the inverter.
Replace the MCU PWB.
F9 00 Content Communication trouble between MCU
and printer PWB (MCU detection)
Detail Communication establishment error,
framing error, parity error, protocol error
Cause Bad connection of printer PWB connec-
tor
Defective harness between printer PWB
and MCU PWB.
Motherboard connector pin breakage
Printer PWB ROM error, data error
Check and Check connector/harness of printer PWB
remedy and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
10 Content Printer PWB trouble
Detail Communication trouble between MCU
and printer PWB
Cause Bad connection of printer PWB connec-
tor
Defective harness between printer PWB
and MCU PWB.
Motherboard connector pin breakage
Printer PWB ROM error, data error
Check and Check connector/harness of printer PWB
remedy and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
80 Content Printer PWB communication trouble
(Protocol)
Detail Communication trouble between MCU
and printer PWB (Protocol error)
Cause Bad connection of printer PWB connec-
tor
Defective harness between printer PWB
and MCU PWB.
Motherboard connector pin breakage
Printer PWB ROM error, data error
Check and Check connector/harness of printer PWB
remedy and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
81 Content Printer PWB communication trouble
(Parity)
Details Communication trouble between MCU
and printer PWB (Parity error)
Cause Printer PWB connector disconnection
Printer PWB MCU PWB harness failure
Printer PWB mother board connector pin
breakage. Printer PWB ROM defect,
data failure
Detail of trouble