Code :

Code: E7-28
Description: LSU-PCU connection error
Causes: 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
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.

Code: E7-29
Description: LSU ASIC frequency error
Causes: Oscillation abnormality of the external oscillator and the internal oscillating circuit used in the LSU ASIC. LSU ASIC abnormality on the LSU ASIC PWB.
Remedy: Replace the LSU cnt PWB.

Code: E7-42
Description: Data error (ACRE ASIC)
Causes: Image transfer trouble.
Remedy: Check the connection state of the ACRE ASIC PWB connector. Replace the ACRE ASIC PWB.

Code: E7-46
Description: Decode error (ACRE ASIC)
Causes: Compression data abnormality. Garbled data are produced in image compression/ transmission. ACRE ASIC PWB trouble.
Remedy: Check the installation state of the PWB. Check connection of the ACRE ASIC PWB. Replace the ACRE ASIC PWB.

Code: E7-48
Description: Memory error (ACRE ASIC)
Causes: DIMM trouble, memory slot trouble. DIMM insertion trouble, different DIMM inserted.
Remedy: DIMM trouble. Replace the PWB.

Code: E7-50
Description: Engine connection trouble
Causes: 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.
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.

Code: E7-55
Description: PWB information sum error (Engine detection)
PCU EEPROM PWB information sum error
Causes: PCU EEPROM sum check error. PCU EEPROM trouble. PCU EEPROM contact trouble. Malfunction due to noises
Remedy: Replace the PCU PWB. Replace the PCU EEPROM.