Sharp AL-1611 Service Manual page 54

Main Sub
code code
F9 81 Check and Check the connectors and harness of
remedy the printer PWB and the MCU PWB.
Check grounding of the machine.
Check the ROM of the printer PWB.
82 Content Printer PWB communication trouble
(Overrun)
Details Communication trouble between MCU
and printeu PWB (Overrun 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
Check and Check the connectors and harness of
remedy the printer PWB and the MCU PWB.
Check grounding of the machine.
Check the ROM of the printer PWB.
84 Content Printer PWB communication trouble
(Framing)
Details Communication trouble between MCU
and printer PWB (Framing 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
Check and Check the connectors and harness of
remedy the printer PWB and the MCU PWB.
Check grounding of the machine.
Check the ROM of the printer PWB.
88 Content Printer PWB communication trouble
(Time-out)
Details Communication trouble between MCU
and printeu PWB (Time-out 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
Check and Check the connectors and harness of
remedy the printer PWB and the MCU PWB.
Check grounding of the machine.
Check the ROM of the printer PWB.
H2 00 Content Thermistor open detection
Detail Fusing thermistor open
Cause Thermistor defect
MCU PWB defect
Fusing section connector contact failure
Power supply failure
Fusing unit not installed
Check and Check the harness and the connector of
remedy the thermistor and the MCU.
Clear the self diag display with SIM 14.
H3 00 Content Heat roller abnormally high temperature
Detail Fusing temperature of 220 ~ 240°C.
Cause Thermistor defect
MCU PWB defect
Fusing connector connection failure
Power supply failure
Detail of trouble
AL-1611/AL-1622 TROUBLE CODE LIST
10 – 4
Main Sub
code code
H3 00 Check and Check the heater lamp blinking with SIM
remedy 5-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
When the lamp lights up instead of blink-
ing:
Check the lamp control circuit of the
power supply PWB and the MCU PWB.
Clear the trouble with SIM 14.
H4 00 Content Heat roller abnormally low temperature
Detail When the temperature does not reach
155°C within 55 sec after turning on the
power, or when it falls under 145°C dur-
ing printing, or when it falls under 100°C
during pre-heating.
Cause Thermistor failure
Heater lamp failure
MCU PWB failure
Thermostat failure
Power supply failure
Interlock switch failure
Check and Check blinking of the heater lamp with
remedy SIM 5-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
When the lamp does not light:
Check for heater lamp disconnection or
thermostat disconnection.
Check the interlock switch.
Check the power supply PWB and
MCU PWB lamp control circuit.
Clear the trouble with SIM 14.
L1 00 Content Mirror base feed trouble
Detail The mirror home position (MHPS) does
not turn off though the feed operation is
completed during mirror initial operation
after turning on the power.
The mirror home position (MHPS) does
not turn off during shading operation.
The mirror home position (MHPS) does
not turn on when the mirror base is
returned for the specified time after copy
feed is started and SPF scanning posi-
tion shift is performed.
Cause Mirror unit defect
Mirror home position sensor defect
MCU PWB defect Scanner wire discon-
nection
Check and Check the scanning operation with SIM
remedy 1-1.
L3 00 Content Mirror base return trouble
Detail The mirror home position (MHPS) does
not turn on though the mirror base
returning is completed during mirror ini-
tial operation after turning on the power.
The mirror home position does not turn
on when the mirror is returned to the
home position during shading.
The mirror home position (MHPS) does
not turn on when the mirror base return-
ing is completed for the specified time
(about 6 sec) after copy return start.
Detail of trouble