Sharp MX-4100N Service Manual page 296

E7-28 LSU-PCU connection error
Trouble content
Detail PCU
Cause Communication error between the CPU in the PCU
PWB and the control ASIC.
Improper connection of the communication
connector between the PCU PWB and the LSU cnt
PWB (interface PWB).
Harness trouble between the PCU PWB and the LSU
cnt PWB (interface PWB)
PCU PWB or LSU cnt PWB (interface PWB) trouble
Check & Remedy Check connection of the connector and the harness
between the PCU PWB and the LSU cnt PWB
(interface PWB).
Replace the LSU cnt PWB.
Replace the PCU PWB.
E7-29 LSU ASIC frequency error
Trouble content
Detail PCU
Cause Oscillation abnormality of the external oscillator and
the internal oscillating circuit used in the LSU ASIC.
LSU ASIC abnormality on the LSU ASIC PWB.
Check & Remedy Replace the LSU cnt PWB.
E7-42 Data error (ACRE ASIC)
Trouble content
Detail MFP
Cause Image transfer trouble.
Detail Check the connection state of the ACRE ASIC PWB
connector.
Replace the ACRE ASIC PWB.
E7-46 Decode error (ACRE ASIC)
Trouble content
Detail MFP
Cause Compression data abnormality.
Garbled data are produced in image compression/
transmission.
ACRE ASIC PWB trouble.
Check & Remedy Check the installation state of the PWB.
Check connection of the ACRE ASIC PWB.
Replace the ACRE ASIC PWB.
E7-48 Memory error (ACRE ASIC)
Trouble content
Detail MFP
Cause DIMM trouble, memory slot trouble.
DIMM insertion trouble, different DIMM inserted.
Check & Remedy DIMM trouble.
Replace the PWB.
E7-49 Water Mark data error
Trouble content
Detail MFP
Cause Watermark data trouble
Check & Remedy Use SIM49-5 to upload the watermark data.
Replace the HDD.
MX-5001N SELF DIAG AND TROUBLE CODE 7 – 10
E7-50 Engine connection trouble
Trouble content
Detail PCU
Cause A PWB, or firmware, or LSU which is not supported
by the machine specifications is detected in the PCU
PWB.
PCU PWB trouble.
LSU trouble.
Check & Remedy Check the kind and the version of the firmware.
Check the LSU, and replace it if necessary.
Check the PCU PWB, and replace it if necessary.
E7-55 PWB information sum error
(Engine detection)
Trouble content PCU EEPROM PWB information sum error
Detail PCU
Cause PCU EEPROM sum check error.
PCU EEPROM trouble.
PCU EEPROM contact trouble.
Malfunction due to noises
Check & Remedy Replace the PCU PWB.
Replace the PCU EEPROM.
E7-60 Combination error between the MFP
PWB and other PWB, firmware
Trouble content
Detail MFP
Cause A PWB or firmware which is not supported by the
machine specifications is detected in the MFP PWB.
MFP PWB trouble.
The PWB/firmware which is not supported by the
machine specifications is connected.
Check & Remedy Check the kind and the version of the firmware.
Check the MFP PWB, and replace it if necessary.
E7-61 Combination error between the MFP
PWB and the PCU PWB
Trouble content
Detail MFP
Cause Combination error between the MFP PWB and the
PCU PWB.
MFP PWB trouble.
PCU PWB trouble.
Check & Remedy Check the combination between the MFP PWB and
the PCU PWB.
Replace the MFP PWB.
Replace the PCU PWB.
E7-65 MFP EEPROM sum check error
Trouble content
Detail MFP
Cause MFP PWB EEPROM device breakdown.
Contact trouble of the MFP EEPROM device.
Malfunction due to noises.
Check & Remedy Replace the MFP PWB.
Replace the MFP PWB EEPROM.