AR-200 (serv.man5). AR200 Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 20

Main 
code

Sub

code

Detail of trouble

E7

03

Content

LSU trouble

Detail

After the polygon motor becomes
active, BD signal (HSYNC) from the
LSU is not detected at the specified
times (41 

±

 10 times within 20msec).

Cause

LSU connector disconnection or LSU’s
inside harness disconnection or
breakage
Polygon motor rotation abnormality
Improper positioning of the laser home
position sensor in the LSU.
Laser power voltage failure
Laser emitting diode abnormality
MCU PWB abnormality

Check and
remedy

Improper connection of the LSU
connector
Check the polygon motor operation
with SIM 25-10.
Check printing with SIM64-1.
Check laser emission of laser emitting
diode.
Check the LSU unit.
Check the MCU PWB.

04

Content

CCD white level trouble

Detail

CCD white reference level which is
read during the copy lamp lighting is
abnormal.

Cause

Flat cable installation failure to CCD unit
Dirt on the mirror, lens, and reference
white plate
Copy lamp lighting failure
CCD unit installation failure
CCD unit abnormality
MCU PWB abnormality

Check and
remedy

Clean the mirror, the lens, and the
reference white plate. 
Check the copy lamp (SIM 5-3) ON.
CCD unit check
MCU PWB check

05

Content

CCD black level trouble

Detail

CCD black level which is read while the
copy lamp is off is abnormal.

Cause

Flat cable installation failure
CCD unit abnormality
MCU PWB abnormality

Check and
remedy

Check flat cable installation to the CCD
unit.
CCD unit check
MCU PWB check

F1

06

Content

Shift motor abnormality

Detail

The rotation pulse is not detected for
0.5sec or more during rotation of the
shifter motor.

Cause

Motor lock
Motor rotation abnormality
Overcurrent to the motor
MCU abnormality

Check and
remedy

Check the operation of the shifter motor
with SIM 3-3.

H2

00

Content

Thermistor open detection

Detail

Fusing thermistor open

Main 
code

Sub

code

Detail of trouble

H2

00

Cause

Thermistor defect
MCU PWB defect
Fusing section connector contact failure
Power failure
Fusing unit not installed

Check and
remedy

Check the harness and the connector
of 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 failure

Check and
remedy

Check the heater lamp blinking with
SIM 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

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

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.

Cause

Thermistor failure
Heater lamp failure
MCU PWB failure
Thermostat failure
Power failure
Interlock switch failure

Check and
remedy

Check blinking of the heater lamp with
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 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.

AR-200

6 – 2