Sharp AR-M256 Service Manual page 102

Trouble
code
Main Sub
code code
E1 80 Content IMC PWB communication trouble
(protocol)
Details Communication trouble between MCU and
IMC PWB (Protocol error)
Cause IMC PWB connector disconnection.
Motherboard connector pin breakage.
IMC PWB ROM defect, data failure.
Check Check the connectors of the IMC PWB and
and MCU PWB.
remedy
Check the grounding of the copier.
Check the ROM of the IMC PWB.
81 Content IMC PWB communication trouble (Parity)
Details Communication trouble between MCU and
printer IMC (Parity error)
Cause IMC PWB connector disconnection.
Motherboard connector pin breakage.
IMC PWB ROM defect, data failure.
Check Check the connectors of the IMC PWB and
and MCU PWB.
remedy
Check the grounding of the copier.
Check the ROM of the IMC PWB.
82 Content IMC PWB communication trouble
(Overrun)
Details Communication trouble between MCU and
IMC PWB (Overrun error)
Cause IMC PWB connector disconnection.
Motherboard connector pin breakage.
IMC PWB ROM defect, data failure.
Check Check the connectors of the IMC PWB and
and MCU PWB.
remedy
Check the grounding of the copier.
Check the ROM of the IMC PWB.
84 Content IMC PWB communication trouble
(Framing)
Details Communication trouble between MCU and
IMC PWB (Framing error)
Cause IMC PWB connector disconnection.
Motherboard connector pin breakage.
IMC PWB ROM defect, data failure.
Check Check the connectors of the IMC PWB and
and MCU PWB.
remedy
Check the grounding of the copier.
Check the ROM of the IMC PWB.
88 Content IMC PWB communication trouble
(Time-out)
Details Communication trouble between MCU and
IMC PWB (Time-out error)
Cause IMC PWB connector disconnection.
Motherboard connector pin breakage.
IMC PWB ROM defect, data failure.
Check Check the connectors of the IMC PWB and
and MCU PWB.
remedy
Check the grounding of the copier.
Check the ROM of the IMC PWB.
Details of trouble
AR-M256/M257/M258/M316/M317/M318/5625/5631 TROUBLE CODE LIST 9 - 3
Trouble
code
Main Sub
code code
E7 02 Content LSU trouble
Details BD signal from LSU is not detected in a
constant cycle (Kept OFF or ON)
Cause LSU connector or LSU inside harness
trouble or disconnection.
Polygon motor rotation abnormality.
Laser does not illuminate.
MCU PWB failure.
Check Check for disconnection of the LSU
and connector.
remedy
Check the LSU operation with SIM 61-1.
Check that the polygon motor rotates
normally.
Check laser LED lighting.
Replace the LSU unit.
Replace the MCU PWB.
10 Content CCD black level error
Details CCD black reference plate scan level
abnormality when the copy lamp turns off.
Cause Flat cable installation failure to CCD unit.
CCD unit error.
Check Check flat cable installation to the CCD
and unit.
remedy Check CCD unit.
11 Content CCD white level error
Details Improper CCD white reference plate
reading level for copy lamp lighting
Cause Flat cable installation failure to CCD unit.
Dirt on the mirror, lens, and reference
white plate.
Copy lamp lighting trouble.
CCD unit abnormality.
MCU PWB abnormality. (Occurred in the
RSPF scan position)
Check Clean the mirror, the lens, and the
and reference white plate.
remedy Check the copy lamp light quantity and its
operation. (SIM 5-3)
Check CCD unit.
Check MCU PWB.
12 Content Shading trouble
Details White correction is not completed in the
specified number of times.
Cause Flat cable installation failure to CCD unit.
Dirt on the mirror, lens, and reference.
white plate.
Copy lamp lighting trouble.
CCD unit abnormality.
MCU PWB abnormality.
Check Clean the mirror, the lens, and the
and reference white plate.
remedy Check the copy lamp light quantity and its
operation. (SIM 5-3)
Check CCD unit.
Check MCU PWB.
Details of trouble