Sharp DM-2000 (serv.man7) Service Manual ▷ View online
E7
05
Cause
Flat cable installation failure
CCD unit abnormality
MCU PWB abnormality
CCD unit abnormality
MCU PWB abnormality
Check and
remedy
remedy
Check flat cable installation to the
CCD unit.
CCD unit check
MCU PWB check
CCD unit.
CCD unit check
MCU PWB check
H2
00
Content
Thermistor open detection
Detail
Fusing thermistor open
Cause
Thermistor defect
MCU PWB defect
Fusing section connector contact
failure
Power failure
Fusing unit not installed
MCU PWB defect
Fusing section connector contact
failure
Power failure
Fusing unit not installed
Check and
remedy
remedy
Check the harness and the
connector of the thermistor and
the MCU.
Clear the self diag display with
SIM 14.
connector of the thermistor and
the MCU.
Clear the self diag display with
SIM 14.
H3
00
Content
Heat roller abnormally high
temperature
temperature
Detail
Fusing temperature of 220
∼
240˚C.
Cause
Thermistor defect
MCU PWB defect
Fusing connector connection failure
Power failure
MCU PWB defect
Fusing connector connection failure
Power failure
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.
H4
00
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.
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.
DM-2000
9 – 4
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
Cause
EEPROM failure
Installation of uninitialized EEPROM
MCU PWB EERPOM access
circuit failure
Installation of uninitialized EEPROM
MCU PWB EERPOM access
circuit failure
Check and
remedy
remedy
Check that the EEPROM is
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
11
Content
Counter check sum error
Detail
Counter check sum value stored
in the EEPROM is abnormal.
in the EEPROM is abnormal.
Cause
EEPROM failure
Control circuit hung up by noises
MCU PWB EEPROM access
circuit defect
Control circuit hung up by noises
MCU PWB EEPROM access
circuit defect
Check and
remedy
remedy
Check that the EEPROM is
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
12
Content
Adjustment value check sum error
(EEPROM)
(EEPROM)
Detail
Adjustment value data area check
sum error
sum error
Cause
EEPROM failure
Control circuit hung up by noises
MCU PWB EEPROM access
circuit failure
Control circuit hung up by noises
MCU PWB EEPROM access
circuit failure
U2
12
Check and
remedy
remedy
Check that the EEPROM is
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
properly set.
To prevent against loss of
counter/adjustment values, record
the values with simulation.
U2 trouble cancel with SIM 16
MCU PWB replacement
U3
29
Content
Mirror base home position error
Detail
Home position is not detected
when starting mirror base shift.
when starting mirror base shift.
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.
U9
00
Content
U9-
∗∗
Communication trouble
between MCU and OPE (OPE
detection)
detection)
Detail
Communication setup error,
framing, parity, protocol error
framing, parity, protocol error
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
Check the ROM of the operation
control PWB.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
Check the ROM of the operation
control PWB.
80
Content
Operation control PWB
communication trouble (Protocol)
communication trouble (Protocol)
Detail
Communication trouble between
MCU and the operation control
PWB (Protocol error)
MCU and the operation control
PWB (Protocol error)
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
81
Content
Operation control PWB
communication trouble (Parity)
communication trouble (Parity)
Detail
Communication trouble between
MCU and the operation control
PWB (Parity error)
MCU and the operation control
PWB (Parity error)
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
82
Content
Operation control PWB
communication trouble (Overrun)
communication trouble (Overrun)
Detail
Communication trouble between
MCU and the operation control
PWB (Overrun error)
MCU and the operation control
PWB (Overrun error)
DM-2000
9 – 5
U9
82
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
84
Content
Operation control PWB
communication trouble (Framing)
communication trouble (Framing)
Detail
Communication trouble between
MCU and the operation control
PWB (Framing error)
MCU and the operation control
PWB (Framing error)
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
88
Content
Operation control PWB
communication trouble (Time-out)
communication trouble (Time-out)
Detail
Communication trouble between
MCU and the operation PWB
(Time-out error)
MCU and the operation PWB
(Time-out error)
Cause
Operation control PWB connector
disconnection
Operation control PWB MCU PWB
harness failure
disconnection
Operation control PWB MCU PWB
harness failure
Check and
remedy
remedy
Check the connectors and harness
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
of the operation control PWB and
the MCU PWB.
Check grounding of the machine.
F6
00
Content
F6-
∗∗
Communication trouble
between MCU and FAX (MCU
detection)
detection)
Detail
Communication establishment
error, framing error, parity error,
protocol error
error, framing error, parity error,
protocol error
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB.
Motherboard connector pin
breakage
FAX control PWB ROM error, data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB.
Motherboard connector pin
breakage
FAX control PWB ROM error, data
error
Check and
remedy
remedy
Check connector/harness of FAX
control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
10
Content
FAX control PWB trouble
Detail
Communication trouble between
MCU and FAX control WPB
MCU and FAX control WPB
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
F6
10
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
80
Content
FAX control PWB communication
trouble (Protocol)
trouble (Protocol)
Detail
Communication trouble between
MCU and FAX control PWB
(Protocol error)
MCU and FAX control PWB
(Protocol error)
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
81
Content
FAX control PWB communication
trouble (Parity)
trouble (Parity)
Detail
Communication trouble between
MCU and FAX control PWB
(Parity error)
MCU and FAX control PWB
(Parity error)
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
82
Content
FAX control PWB communication
trouble (Overrun)
trouble (Overrun)
Detail
Communication trouble between
MCU and FAX control PWB
(Overrun error)
MCU and FAX control PWB
(Overrun error)
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
84
Content
FAX control PWB communication
trouble (Framing)
trouble (Framing)
Detail
Communication trouble between
MCU and FAX control PWB
(Framing error)
MCU and FAX control PWB
(Framing error)
DM-2000
9 – 6
F6
84
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
88
Content
FAX control PWB communication
trouble (Timeout)
trouble (Timeout)
Detail
Communication trouble between
MCU and FAX control PWB
(Timeout error)
MCU and FAX control PWB
(Timeout error)
Cause
Bad connection of FAX control
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
PWB connector
Defective harness between FAX
control PWB and MCU PWB
Motherboard connector pin
breakage
FAX control PWB ROM error/Data
error
Check and
remedy
remedy
Check connector/harness between
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
FAX control PWB and MCU PWB.
Check grounding of the machine.
Check FAX control PWB ROM.
F9
00
Content
F9-
∗∗
Communication trouble
between MCU and FAX (MCU
detection)
detection)
Detail
Communication establishment
error, framing error, parity error,
protocol error
error, framing error, parity error,
protocol error
Cause
Bad connection of printer PWB
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
Check and
remedy
remedy
Check connector/harness of printer
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
10
Content
Printer PWB trouble
Detail
Communication trouble between
MCU and printer PWB
MCU and printer PWB
Cause
Bad connection of printer PWB
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
Check and
remedy
remedy
Check connector/harness of printer
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
F9
80
Content
Printer PWB communication
trouble (Protocol)
trouble (Protocol)
Detail
Communication trouble between
MCU and printer PWB (Protocol
error)
MCU and printer PWB (Protocol
error)
Cause
Bad connection of printer PWB
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
connector
Defective harness between printer
PWB and MCU PWB.
Motherboard connector pin
breakage
Printer PWB ROM error, data error
Check and
remedy
remedy
Check connector/harness of printer
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
PWB and MCU PWB.
Check grounding of the machine.
Check printer PWB ROM.
DM-2000
9 – 7
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