Read Sharp DM-2000 (serv.man7) Service Manual online
E1
80
Check and
remedy
remedy
Check the connectors and harness
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
81
Content
E-Sort PWB communication
trouble (Parity)
trouble (Parity)
Detail
Communication trouble between
MCU and printer E-Sort (Parity
error)
MCU and printer E-Sort (Parity
error)
Cause
E-Sort PWB connector
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
Check and
remedy
remedy
Check the connectors and harness
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
82
Content
E-Sort PWB communication
trouble (Overrun)
trouble (Overrun)
Detail
Communication trouble between
MCU and E-Sort PWB (Overrun
error)
MCU and E-Sort PWB (Overrun
error)
Cause
E-Sort PWB connector
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
Check and
remedy
remedy
Check the connectors and harness
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
84
Content
E-Sort PWB communication
trouble (Framing)
trouble (Framing)
Detail
Communication trouble between
MCU and E-Sort PWB (Framing
error)
MCU and E-Sort PWB (Framing
error)
Cause
E-Sort PWB connector
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
Check and
remedy
remedy
Check the connectors and harness
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
E1
88
Content
E-Sort PWB communication
trouble (Time-out)
trouble (Time-out)
Detail
Communication trouble between
MCU and E-Sort PWB (Time-out
error)
MCU and E-Sort PWB (Time-out
error)
Cause
E-Sort PWB connector
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
disconnection
E-Sort PWB MCU PWB harness
failure
E-Sort Motherboard connector pin
breakage.
E-Sort PWB ROM defect, data
failure
Check and
remedy
remedy
Check the connectors and harness
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
of the E-Sort PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the E-Sort
PWB.
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
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
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
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.
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.
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
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
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
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.
while the copy lamp is off is
abnormal.
DM-2000
9 – 3
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