Sharp AR-6020V Service Manual page 71

: '19/Oct.
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H3-01 Fusing section high temperature
trouble (Sub)
Detail MCU
Cause Sub thermistor trouble
MCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & Remedy Use SIM 5-02 to check the heater lamp blinking
operation.
When normally lighting.
Check the sub thermistor and its harness.
Check the sub thermistor input circuit on the MCU
PWB.
When not normally lighting.
Check the lamp control circuit on the MCU PWB.
Cancel the trouble with SIM 14.
H4-00 Thermistor low temperature detec-
tion
Detail MCU
Cause Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
MCU PWB abnormality
Check & Remedy Use SIM 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 MCU 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.
Cancel the trouble with SIM 14.
H5-01 5 continuous POUT not-reached
error
Detail MCU
Cause Jam paper is not removed from the fusing unit. (Jam
paper remains.)
Paper exit sensor breakdown or harness connection
trouble
Fusing unit installation trouble
Check & Remedy Check for jam paper remaining in the fusing unit.
(winding, etc.)
Check the POUT sensor harness, and check
installation of the fusing unit.
Use SIM14 to clear the self diag display.
L1-00
Cause
Check & Remedy
L3-00
Cause
Check & Remedy
L4-01
Cause
Check & Remedy
L4-36
Cause
Check & Remedy
AR-6020V TROUBLESHOOTING 7 – 4
Scanner feed trouble
Detail MCU
Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality
Use SIM 1-1 to check the mirror reciprocating
operations.
When the mirror does not return.
Check for disconnection of the scanner wire.
Check the harness and the connector between the
mirror motor and the MCU PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home position
sensor.
Scanner return trouble
Detail MCU
Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality
Use SIM 1-1 to check the mirror reciprocating
operations.
When the mirror does not return.
Check for disconnection of the scanner wire.
Check the harness and the connector between the
mirror motor and the MCU PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home position
sensor.
Main motor lock trouble
Detail MCU
Main motor unit abnormality
Improper connection or disconnection the main motor
and the harness.
MCU PWB abnormality
Use SIM 25-01 to check the main motor operations.
Check connection of the main motor harness/
connector.
Replace the main motor.
Replace the MCU PWB.
<26/31 CPM only> LSU fan lock
detection
Detail MCU
LSU fan.
MCU PWB trouble.
Connection trouble of the connector and the harness.
Check connection of the fan harness and the
connector.
Replace the fan.
Replace the MCU PWB.
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