Sharp AL-2051 Service Manual page 110

Main Sub
Details of trouble
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 SIM 5-3 to check the copy lamp
and operations.
remedy 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 Check the harness and the connector
and between the thermistor and the PWB.
remedy Use SIM 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 SIM 5-02 to check the heater lamp
and blinking 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 SIM 14 to clear the self diagnostic
display.
Main
code
AL-2051 SIMULATION, TROUBLE CODES 10 - 34
Sub
Details of trouble
code
H4 00 Content Heat roller low temperature detection
Detail 1) When the target temperature (165°C) is
not reached in 55 sec after starting
warming-up.
2) When the temperature below 100°C is
detected for 300ms under the ready print
state.
∗ "Starting warming-up" means not only that
in power supply but also reset that in reset
from shut-off and in side door close. (The
timing of generating H4 is not limited to
that in power supply.)
Cause Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
Control PWB abnormality
Check Use SIM 5-02 to check the heater lamp
and blinking 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 SIM 14 to clear the self diagnostic
display.
L1 00 Content Feeding is not completed within the
specified time after starting feeding. (The
scan head locking switch is locked)
Detail The white area and the black marking on the
shading plate are used to obtain the
difference in the CCD level values for
judgment of lock. When the difference in the
levels of which and black is small, it is judged
that the black mark could not be scanned by
lock and the trouble code "L1" is displayed.
Cause The scan head is locked by the lock switch.
Mirror unit abnormality
The scanner wire is disconnected.
The origin detection sensor abnormality
Mirror motor harness abnormality
Check Check to confirm that the scan head lock
and switch is released.
remedy Use SIM 1-1 to check the mirror
reciprocating operations.
When the mirror does not feed.
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.