Read Sharp DM-2000 (serv.man7) Service Manual online
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
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