AL-1611 (serv.man12). Trouble code list - Sharp Copying Equipment Service Manual (repair manual). Page 2

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AL-1611/AL-1622
TROUBLE CODE LIST
10 – 2
E1
13
Detail
E-Sort PWB Flash ROM abnormality
Cause
A Flash ROM abnormality is detected in 
the E-Sort PWB. 
Control circuit hung up due to noises 
Flash ROM peripheral circuit error
Check and 
remedy
Replace the E-Sort PWB. 
Rewrite the flash ROM data. 
Check grounding of the machine.
14
Content
E-Sort PWB Work RAM error
Detail
E-Sort PWB Work RAM abnormality
Cause
A Work RAM abnormality is detected in 
the E-Sort PWB. 
Control circuit hung up due to noises 
RAM peripheral circuit error
Check and 
remedy
Replace the E-Sort PWB. 
Check grounding of the machine.
15
Content
E-Sort PWB Page Memory error
Detail
E-Sort PWB Page Memory abnormality
Cause
A Page Memory abnormality is detected 
in the E-Sort PWB. 
Control circuit hung up due to noises 
Page Memory peripheral circuit error
Check and 
remedy
Replace the E-Sort PWB. 
Check grounding of the machine.
16
Content
E-Sort PWB SIMM error
Detail
E-Sort PWB SIMM abnormality
Cause
A SIMM abnormality is detected in the E-
Sort PWB. 
Control circuit hung up due to noises 
SIMM peripheral circuit error
Check and 
remedy
Replace the E-Sort PWB. Replace the 
SIMM. 
Check grounding of the machine.
17
Content
E-Sort PWB image rotating RAM error
Detail
E-Sort PWB image rotating RAM abnor-
mality
Cause
An image rotating RAM abnormality is 
detected in the E-Sort PWB. 
Control circuit hung up due to noises 
Image rotating RAM peripheral circuit 
error
Check and 
remedy
Replace the E-Sort PWB. 
Check grounding of the machine.
80
Content
E-Sort PWB communication trouble 
(protocol)
Detail
Communication trouble between MCU 
and printer PWB (Protocol 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
Check and 
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.
81
Content
E-Sort PWB communication trouble 
(Parity)
Detail
Communication trouble between MCU 
and printer E-Sort (Parity error)
Main
code
Sub
code
Detail of trouble
E1
81
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
Check and 
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.
82
Content
E-Sort PWB communication trouble 
(Overrun)
Detail
Communication trouble between 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
Check and 
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.
84
Content
E-Sort PWB communication trouble 
(Framing)
Detail
Communication trouble between 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
Check and 
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.
88
Content
E-Sort PWB communication trouble 
(Time-out)
Detail
Communication trouble between MCU 
and E-Sort PWB (Time-out error)
Cause
E-Sort PWB connector disconnection 
E-Sort PWB and MCU PWB harness fail-
ure 
E-Sort Motherboard connector pin 
breakage. 
E-Sort PWB ROM defect, data failure
Check and 
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.
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 
m
 10 
times within 20msec).
Cause
LSU connector disconnection or LSU’s 
inside harness disconnection or break-
age 
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
Main
code
Sub
code
Detail of trouble
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