Read Sharp AR-205 (serv.man12) Service Manual online
Main
code
code
Sub
code
Detail of trouble
H3
00
Check and
remedy
remedy
Check the heater lamp blinking
with SIM 5-2.
with SIM 5-2.
When the lamp blinks normally:
Check the thermistor and the
harness. Check the MCU PWB
thermistor input circuit.
Check the thermistor and the
harness. Check the MCU PWB
thermistor input circuit.
When the lamp lights up instead
of blinking:
Check the lamp control circuit of
the power PWB and the MCU
PWB.
of blinking:
Check the lamp control circuit of
the power PWB and the MCU
PWB.
Clear the trouble with SIM 14.
H4
00
Content
Heat roller abnormally low
temperature
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 during printing,
or when it falls under 100˚C
during pre-heating.
reach 155˚C within 55 sec after
turning on the power, or when it
falls under 145˚C during printing,
or when it falls under 100˚C
during pre-heating.
Cause
Thermistor failure
Heater lamp failure
MCU PWB failure
Thermostat failure
Power failure
Interlock switch failure
Heater lamp failure
MCU PWB failure
Thermostat failure
Power failure
Interlock switch failure
Check and
remedy
remedy
Check blinking of the heater lamp
with SIM 5-2.
with SIM 5-2.
When the lamp blinks normally:
Check the thermistor and the
harness.
Check the MCU PWB thermistor
input circuit.
Check the thermistor and the
harness.
Check the MCU PWB thermistor
input circuit.
Check and
remedy
remedy
When the lamp does not light:
Check for heater lamp
disconnection or thermostat
disconnection.
Check the interlock switch.
Check the power PWB and MCU
PWB lamp control circuit.
Check for heater lamp
disconnection or thermostat
disconnection.
Check the interlock switch.
Check the power 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 position shift is
performed.
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 position shift is
performed.
Cause
Mirror unit defect
Mirror home position sensor defect
MCU PWB defect
Scanner wire disconnection
Mirror home position sensor defect
MCU PWB defect
Scanner wire disconnection
Check and
remedy
remedy
Check the scanning operation with
SIM 1-1.
SIM 1-1.
Main
code
code
Sub
code
Detail of trouble
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 initial 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 returning is completed for
the specified time (about 6 sec)
after copy return start.
does not turn on though the mirror
base returning is completed during
mirror initial 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 returning is completed for
the specified time (about 6 sec)
after copy return start.
Cause
Mirror unit
Mirror home position sensor defect
MCU PWB defect
Scanner wire disconnection
Mirror home position sensor defect
MCU PWB defect
Scanner wire disconnection
Check and
remedy
remedy
Check the scanning operation with
SIM 1-1.
SIM 1-1.
L4
01
Content
Main motor lock
Detail
The main motor encoder pulse is
not detected for 400msec.
not detected for 400msec.
Cause
Main motor defect
Harness disconnection between
the MCU PWB and the main
motor.
Control circuit failure
Harness disconnection between
the MCU PWB and the main
motor.
Control circuit failure
Check and
remedy
remedy
Check the main motor operation
with SIM 25-1.
Check the harness and the
connector between the MCU PWB
and the main motor.
with SIM 25-1.
Check the harness and the
connector between the MCU PWB
and the main motor.
L6
10
Content
Polygon motor lock
Detail
The lock signal (the specified
rotation speed signal) is not
supplied within the specified time
(about 6 sec)after starting the
polygon motor rotation.
rotation speed signal) is not
supplied within the specified time
(about 6 sec)after starting the
polygon motor rotation.
Cause
LSU connector disconnection or
harness disconnection in the LSU.
harness disconnection in the LSU.
Check and
remedy
remedy
Check the operation of the
polygon motor with SIM 25-10.
Check the harness and the
connector connection.
LSU replacement
polygon motor with SIM 25-10.
Check the harness and the
connector connection.
LSU replacement
L8
01
Content
Zero cross pulse (FW) trouble
Detail
Zero cross pulse width is shifted
by 55Hz
by 55Hz
±
10% or more.
Cause
MCU PWB defect
Power unit breakdown
Power unit breakdown
Check and
remedy
remedy
Check the harness and the
connector.
MCU PWB replacement
Power unit replacement
connector.
MCU PWB replacement
Power unit replacement
U2
04
Content
EEPROM serial communication
error
error
Detail
Error in communication with
EEPROM
EEPROM
AR-205
9 – 4
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