Thermostat - Sharp AR-280 Service Manual

AR-405
Trouble code
Main Sub
code code
H3 00...HL1 Content Too hot fusing section
01...HL2 Detail The fusing temperature is over 241.5˚C
(less than 1.3-V input voltage is
detected.)
Cause Thermister defective
Control PWB defective
Improper connection of fusing unit
connector
AC power supply defective
Check Check heater lamp operation with
and SIM5-2.
remedy If lamp blinks properly:
Check thermister and its harness.
Check thermister input circuit of
control PWB.
If lamp lights and stays lit:
Check lamp control circuits of AC
PWB and control PWB.
Clear the trouble with SIM14.
H4 00...HL1 Content Too cold fusing section
01...HL2
Detail The temperature does not reach the
preset value within the specified time (3
min. in usual modes; 5 min. in curl
correction mode.) after the power relay
is turned on.
Cause Thermister defective
Heater lamp defective
Control PWB defective
Thermostat defective
AC power supply defective
Interlock switch defective
Check Check heater lamp for blinking with
and SIM5-2.
remedy If lamp blinks properly:
Check thermister and its harness.
Check thermister input circuit of
control PWB.
If lamp does not light:
Check heater lamp for broken wire
and thermostat for operation.
Check interlock switch.
Check lamp control circuit of AC PWB
and control PWB.
Clear the trouble with SIM14.
H5 01 Content 5 continuous POD1 not-reaching JAM
detection
Detail 5 continuous POD1 not-reaching JAM
detection
Cause Check that the fusing JAM is completely
cancelled. (Jam paper may be
remained.)
POD1 sensor trouble or improper
harness connection
Improper installation of the fusing
harness.
Check Check JAM paper in the fusing section.
and (Winding, etc.)
remedy Check POD1 sensor harness. Check the
fusing unit installation.
Cancel the trouble with SIM 14.
02 Content Fusing thermistor abnormality
Detail Fusing thermistor temperature transient
abnormality (Paper winding)
Cause Paper winding to fusing roller
Fusing pawl abnormality
Fusing unit installation abnormality
Check Check for jam (winding) paper in the
and fusing section.
remedy Check for installation of the fusing unit.
Check the fusing pawl.
Cancel the trouble with SIM 14.
1/21/1999
Description
Trouble code
Main Sub
code code
L1 00 Content Scanner field trouble
Detail
Cause
Check
and
remedy
L3 00 Content Scanner return trouble
Detail
Cause
Check
and
remedy
L4 01 Content Main motor lock detected
Detail
Cause
Check
and
remedy
L6 10 Content Polygon motor lock detected
Detail
Cause
Check
and
remedy
L8 01 Content No full-wave signal
Detail
Cause
Check
and
remedy
02 Content Full-wave signal abnormality
Detai
Cause
Check
and
remedy
11 – 6
Description
Scanner field is not finished within the
specified time. (timer is change by
magnification)
Mirror unit defective
Scanner wire disconnected
Check scanning operation with SIM1-1.
Scanner return is not finished within the
specified time. (timer is change by
magnification)
Mirror unit defective
Scanner wire disconnected
Check scanning operation with SIM1-1.
Motor lock signal is detected for 1.5
seconds during main motor rotation
Main motor defective
Improper connection of harness
between PCU PWB and main motor
Control circuit defective
Check main motor operation with
SIM25-1.
Check harness and connector between
PCU PWB and main motor.
It was judged that there is no output of
polygon motor lock signal of LSU.
The lock signal was checked at about
10-second intervals after the polygon
motor started rotating. As result, it was
judged that the polygon motor failed to
operate normally.
Disconnected connecter to LSU or
detached harness inside LSU or broken
wire.
Polygon motor defective
Check polygon motor operation with
SIM61-1.
Check harness and connector for
connection. Replace LSU if needed.
Full-wave signal is not detected.
PCU PWB trouble
Power unit trouble
Check connection of the harness and
the connector.
Replace the PCU PWB.
Replace the power unit.
Full-wave signal frequency abnormality
detected.
(The detected frequency: 69Hz or above
or 42.5Hz or below)
Check for disconnection or improper
connection of the connector of the PCU
PWB and the power PWB harness.
PCU PWB trouble
Power unit trouble
Check connection of the harness and
connector.
Replace the power unit.