Sharp AL-2051 Service Manual page 109

Main Sub
Details of trouble
code code
E1 82 Content Network board communication interface
error (Overrun)
Detail An overrun error occurs in communication
between the MCU and the network board.
Cause Improper connection of the network board
cable
Improper firmware
Network board abnormality
MCU abnormality
Check Check connection of the network board
and cable.
remedy Update firmware.
Replace the MCU and network board with
new one.
84 Content Network board communication interface
error (Framing)
Detail A framing error occurs in communication
between the MCU and the network board.
Cause Improper connection of the network board
cable
Improper firmware
Network board abnormality
MCU abnormality
Check Check connection of the network board
and cable.
remedy Update firmware.
Replace the MCU and network board with
new one.
E7 01 Content Duplex model memory setup error, memory
not-detected error
Detail The memory is not set properly or the
memory capacity is not set to the duplex
setup (6M).
Check Set SIM 26-39 code number to 2.
and
remedy
02 Content LSU trouble
Detail The BD signal from the LSU cannot be
detected in a certain cycle. (Always OFF or
always ON)
Cause LSU connector or LSU harness defect or
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.
Check Check connection of the LSU connector.
and Execute SIM 61-03 to check the LSU
remedy operations.
Check that the polygon motor rotates
normally.
Check that the laser emitting diode
generates laser beams.
Replace the LSU unit.
Replace the MCU PWB.
10 Content Shading trouble (Black correction)
Detail The CCD black scan level is abnormal when
the shading.
Cause Improper connection of the CCD unit flat
cable
CCD unit abnormality
MCU PWB abnormality
Check Check connection of the CCD unit flat cable.
and Check the CCD unit.
remedy
Main
code
AL-2051 SIMULATION, TROUBLE CODES 10 - 33
Sub
Details of trouble
code
E7 11 Content Shading trouble (White correction)
Detail The CCD white scan level is abnormal when
the shading.
Cause Improper connection of the CCD unit flat
cable
Dirt on the mirror, the lens, and the reference
white plate
Copy lamp lighting abnormality
CCD unit abnormality
MCU PWB abnormality
(When occurred in the SPF/RSPF scan
position.)
Improper installation of the mirror unit
Check Clean the mirror, lens, and the reference
and white plate.
remedy Check the light quantity and lighting status of
the copy lamp (SIM 05-03).
Check the MCU PWB.
16 Content Abnormal laser output
Detail When the laser output is stopped, HSYNC is
detected.
Cause Laser abnormality
MCU PWB abnormality.
Check Check the laser emitting diode operation.
and Replace the MCU PWB.
remedy
F2 64 Content Toner supply abnormality
Detail The maximum toner supply time is greatly
exceeded.
Cause CRUM chip trouble
Improper developing unit
Check Replace the CRUM chip.
and Replace the developing unit.
remedy
70 Content Improper cartridge
Detail The destination of the main unit differs from
that of the CRUM.
When the life cycle information is other than
Not Used (FFh).
Cause CRUM chip trouble
Improper developing unit
Check Replace the CRUM chip.
and Replace the developing unit.
remedy
74 Content Toner cartridge CRUM error
Detail MCU
Cause Toner cartridge (CRUM) trouble.
MCU PWB trouble.
Connector/harness trouble.
Check Replace the toner cartridge.
and Replace the MCU PWB.
remedy Connector and harness check.