Description: IDU error
• After the command is written into the DFID self-diagnosis startup register, the correct value is not stored in the register in the specified duration. NOTE: This error is detected when the main switch is turned on. • After the negate interruption of FGATE occurs, IDU is not recognized in the specified duration. NOTE: This error is detected during scanning operations.
Causes: • IPU board defective (defective connection between ASIC and DFID, or Defective LSYNC)
Code: 195
Description: Serial Number Mismatch
• Serial number stored in the memory does not consist of the correct code.
Causes: • NVRAM defective • BCU replaced without original NVRAM • Incorrect DIP-switch setting
Code: 201
Description: Polygon motor error
• The polygon mirror motor does not reach the targeted operating speed within 10 seconds after turning on. • The lock signal does not become high within 10 seconds after turning off the polygon motor. • The lock signal does not become low within 0.2 second after the polygon motor reaches the targeted operating speed.
Description: Synch. detection signal error 1
220-001: Y 220-002: M 220-003: C 220-004: K0 220-005: K1 The front (for K&Y) or rear (for C&M) laser synchronizing detector board, which is used to determine the start timing of laser writing, does not send a signal while the polygon motor is operating normally and the LD is on.
Causes: • Disconnection of the cable between front (K&Y) or rear (C&M) synchronizing detector board and the LD unit • Incorrect installation of front (K&Y) or rear (C&M) synchronizing detector board (the beam does not target the photo detector.) • Defective LD unit • Defective BCU • Defective +5VLD circuit
Code: 221
Description: Synch. detection signal error 2
221-001: Y 221-002: M 221-003: C 221-004: K Main scan length detection is not properly completed ten consecutive times. The front (for C&M) or rear (for K&Y) laser synchronizing detector boards are used for the main scan length detection, which automatically corrects the main-scan magnification.
Causes: • Damaged or disconnected cable between front (C&M) or rear (K&Y) laser synchronizing detector board and the LD unit • Incorrect installation of front (C&M) or rear (K&Y) synchronizing detector board (the beam does not target the photo detector.) • Defective front (C&M) or rear (K&Y) synchronizing detector board • Defective LD unit
Code: 230
Description: FGATE error
230-001: Y 230-002: M 230-003: C 230-004: K The BCU generates the FGATE signal based on the registration sensor ON timing. Then, it sends the signal to the LD units. The LD units send a feedback signal to the BCU. When the LD units start emitting laser beams, the feedback signal changes from High to Low. The SC code is generated when the BCU receives no feedback signal (stays High) from the LD unit 1 second after paper reaches the position where the laser should start writing.
Causes: • Poor connection between BCU and LD units • Defective BCU • Defective LD unit