Service manual

AL-2030/2040CS/2050CS SIMULATION, TROUBLE CODES 10 - 32
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
and
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
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.
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
and
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
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.
Main
code
Sub
code
Details of trouble
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
and
remedy
Check to confirm that the scan head lock
switch is released.
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.
L3 00 Content Scanner return trouble
Detail When the mirror base is returned for the
specified time (6 sec) in mirror initializing
after turning on the power, the mirror home
position sensor (MHPS) does not turn ON.
Or when the mirror base is returned for the
specified time (about 6 sec) after start of
copy return, the mirror home position sensor
(MHPS) does not turn ON.
Cause Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality
Check
and
remedy
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
code
Sub
code
Details of trouble