• Code: 195
• Description: Serial Number Mismatch
  • Serial number stored in the memory does not have 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 3 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.
• Causes: • Polygon mirror motor error • Abnormal GAVD behavior • Cable disconnection

• Code: 220
• 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, (used to determine the start timing of laser writing), does not send a signal while the polygon motor operates 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 correctly 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 generates 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

• Code: 231
• Description: FGATE timeout
  231-001: Y 231-002: M 231-003: C 231-004: K When LD units emit laser beams to print a job, the feedback signal stays Low. The signal becomes High after laser exposure for a page is completed. The SC code is detected in the following cases: • When the feedback signal stays Low 7 seconds after completing the laser exposure, or • When the feedback signal stays Low until the laser exposure timing for the next page in multi-page print mode.
• Causes: • Poor connection between BCU and LD units • Defective BCU • Defective LD unit

• Code: 240
• Description: LD over
  240-001: Y 240-002: M 240-003: C 240-004: K The power supply for the LD unit exceeds 110 mA.
• Causes: • LD worn out (current/light output characteristics have changed.) • LD broken (short circuit)

• Code: 260
• Description: LD HP sensor not switched on (for K only) During homing, it takes more than five seconds to switch the HP sensor on (the sensor actuator does not cover the sensor).
• Causes: • Defective motor • Defective sensor • Mechanical problem when switching the actuator • Brown fuse (FU81) on the Power supply unit