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
Remedy: Open the front cover and turn on the main switch. Check the serial number with SP5-811-002. If the stored serial number is incorrect, contact your product specialist for details of how to solve the problem.
Code: SC 201
Description: Polygon motor error • The polygon mirror motor does not reach the targeted operating speed within 15 seconds after turning on. • The lock signal does not become high within 15 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.
Remedy: 1. Turn the main switch off and on. 2. Check the cables. 3. Replace the polygon motor.
Code: SC 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, 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
Remedy: 1. Turn the main switch off and on. 2. Check the cable connection between front (for K&Y) or rear (for C&M) synchronizing detector board and the LD unit. 3. Check or reinstall the front (for K&Y) or rear (for C&M) synchronizing detector board. 4. Replace the front (for K&Y) or rear (for C&M) synchronizing detector board. 5. Replace the laser optics housing unit. 6. Replace the BCU. 7. Replace the PSU.
Code: SC 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
Remedy: After doing any of the following, print ten jobs or more to see if the same SC code is displayed: 1. Turn the main switch off and on. 2. Check or replace the cable connecting front (for C&M) or rear (for K&Y) synchronizing detector board and the LD unit. 3. Check or reinstall the front (for C&M) or rear (for K&Y) synchronizing detector board. 4. Replace the front (for C&M) or rear (for K&Y) synchronizing detector board. 5. Replace the laser optics housing unit. 6. Replace the BCU. If a synch. detector board cannot be replaced, do the following as a temporary measure: • Disable main scan length detection (SP 2-919-001)
Code: SC 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
Remedy: 1. Turn the main switch off and on. 2. Check the cables between the LD units and the BCU. 3. Replace the laser optics housing unit. 4. Replace the BCU.
Code: SC 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 and 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
Remedy: 1. Turn the main switch off and on. 2. Check the cables between the LD units and the BCU. 3. Replace the laser optics housing unit. 4. Replace the BCU.