Description: Communication error between PFC and M-CPU
Remedy: (1) Check the signal patterns (REQ, ACK, RXD, TXD) between IC11 (G/A) and IC21 (PFC) on the LGC board for breaks and short-circuits. (2) Replace the LGC board.
Code: C57
Description: Communication error between M-CPU and IPC
Remedy: (1) Check the circuit patterns mainly on IC50 and IC56 on the LGC board for breaks and shortcircuits. (2) Check the pattern on the IPC board for breaks and short-circuits. (3) Replace the IPC board. (4) Replace the LGC board.
Code: C58
Description: Communication error between IPC and the finisher
Remedy: (1) Make sure that only the specified finisher is attached. (2) Check the pattern on the IPC board for breaks and short-circuits. (3) Check the harness connected to connector J2 on the IPC board for disconnected pins and breaks. (4) Check fuse F5 on the power supply unit to see if it is blown. (5) Check the pattern on the control board inside the finisher for breaks and short-circuits. (6) Check the connectors leading up to the PPC board for disconnected pins and the harness for breaks (7) Replace the IPC board. (8) Replace the LGC board
Code: C59
Description: Communication error between M-CPU and L-CPU
Remedy: (1) Check the harness between the LGC board and the laser unit for disconnection and breaks. (2) Check mainly the IC circuits on the LGC board for breaks and short-circuits. (3) Replace the LGC board. (4) Replace the laser optical unit.
Code: C72
Description: Error of aligning sensor adjustment
Remedy: (1) Check between the aligning sensor and the reflection mirror for foreign objects, and the reflection mirror for dirt. (2) Check the harness between the aligning sensor and the LGC board for breaks. (3) Check mainly IC4, IC5 and CN6 on the LGC board for breaks and short-circuits. (4) Replace the aligning sensor. (5) Replace the LGC board. (6) Initialize the ADF EEPROM, and perform automatic sensor adjustment.
Code: C73
Description: EEPROM initializing error
Remedy: (1) Check mainly IC1 on the LGC board for breaks and short-circuits. (2) Replace the LGC board. (3) Initialize the ADF EEPROM, and perform automatic sensor adjustment.