Read Sharp MX-1800N (serv.man16) Service Manual online
MX-1800N SELF DIAG AND TROUBLE CODE 8 – 11
E7-29
LSU-ASIC frequency abnormality
E7-50
Engine connection trouble
E7-55
PWB information sum error
(Engine detection)
(Engine detection)
E7-60
Controller connection trouble
(Engine detection)
(Engine detection)
E7-61
Controller connection trouble
(Engine)
(Engine)
E7-62
Controller connection trouble
(Scanner)
(Scanner)
E7-65
PWB information sum error
(Controller detection)
(Controller detection)
E7-70
Scanner connection trouble
E7-75
PWB information sum error
(Scanner detection)
(Scanner detection)
E7-80
Communication trouble between the
controller and the scanner
controller and the scanner
Trouble content
Oscillation trouble of the external oscillator used in
LSU-ASIC and the internal oscillation circuit
LSU-ASIC and the internal oscillation circuit
Section
PCU
Case 1
Cause
Trouble of the oscillator on the LSU-ASIC PWB,
the resistor and capacitor for the oscillation circuit,
and the LSU-ASIC itself.
the resistor and capacitor for the oscillation circuit,
and the LSU-ASIC itself.
Check and
remedy
remedy
Replace the LSUcnt PWB.
Trouble content
Unknown PWB identification information is
detected in the PCU PWB.
detected in the PCU PWB.
Section
PCU
Case 1
Cause
A PWB which is incompatible with the machine
specifications is connected.
specifications is connected.
Check and
remedy
remedy
1)
Replace the PCU PWB.
2)
Replace the LSU PWB.
Case 2
Cause
A firmware which is incompatible with the machine
specifications is used.
specifications is used.
Check and
remedy
remedy
Check the kind and the version of the firmware.
Trouble content
EEPROM PWB information sum error
Section
PCU
Case 1
Cause
1)
EEPROM device error
2)
EEPROM device contact failure
3)
Device access error due to noises
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
Unknown PWB kind information is detected in the
MFPcnt PWB.
A PWB/firmware which is not compatible with the
machine specifications is connected.
MFPcnt PWB.
A PWB/firmware which is not compatible with the
machine specifications is connected.
Section
MFP
Case 1
Cause
Controller PWB trouble
Check and
remedy
remedy
Replace the controller PWB.
Case 2
Cause
A firmware which is not compatible with the
machine specifications is applied.
machine specifications is applied.
Check and
remedy
remedy
Check the kind and the version of the firmware.
Trouble content
MFPcnt PWB connection trouble
Compatibility trouble between the controller and
the engine
Compatibility trouble between the controller and
the engine
Section
MFP
Case 1
Cause
Combination trouble of the controller PWB and the
engine
engine
Check and
remedy
remedy
Check the controller PWB.
Check the combination between the controller
PWB and the engine.
Check the combination between the controller
PWB and the engine.
Trouble content
Controller connection trouble
Compatibility trouble between the controller and
the scanners
Compatibility trouble between the controller and
the scanners
Section
MFP
Case 1
Cause
Combination trouble between the controller PWB
and the engine
and the engine
Check and
remedy
remedy
Replace the controller PWB.
Check the combination between the controller
PWB and the engine.
Check the combination between the controller
PWB and the engine.
Trouble content
EEPROM PWB information sum error
Section
MFP
Case 1
Cause
1)
EEPROM device trouble
2)
EEPROM device contact failure
3)
Device access error due to noises
Check and
remedy
remedy
Replace the MFPcnt PWB.
Trouble content
Unknown identification information is detected in
the SCU PWB.
the SCU PWB.
Section
SCU
Case 1
Cause
SCU PWB trouble
Check and
remedy
remedy
Replace the SCU PWB.
Case 2
Cause
A firmware which is incompatible with the machine
specifications is connected.
specifications is connected.
Check and
remedy
remedy
Check the kind and the version of the firmware.
Trouble content
EEPROM PWB information sum error
Section
SCU
Case 1
Cause
1)
EEPROM device trouble
2)
EEPROM device contact failure
3)
Device access error due to noises
Check and
remedy
remedy
Replace the scanner control PWB.
Trouble content
Communication trouble between the MFP and the
scanner MFP detection
Communication establishment error/Framing/
Parity/Protocol error
scanner MFP detection
Communication establishment error/Framing/
Parity/Protocol error
Section
MFP
Case 1
Cause
SCU PWB connector connection trouble
Check and
remedy
remedy
Check the connector connection between the SCU
PWB and the MFPcnt PWB.
PWB and the MFPcnt PWB.
Case 2
Cause
Harness trouble between the SCU PWB and the
MFPcnt PWB
MFPcnt PWB
Check and
remedy
remedy
Check the harness between the SCU PWB and the
MFPcnt PWB.
MFPcnt PWB.
Case 3
Cause
Broken connector pin of the SCU PWB mother
board
board
Check and
remedy
remedy
Check grounding of the machine.
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