• Code: SC231
• 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 LD unit. 4. Replace the BCU.

• Code: SC240
• Description: LD over 240-001: Y 240-002: M 240-003: C 240-004: K The power supply for the LD unit exceeds 67 mA.
• Causes: • LD worn out (current/light output characteristics have changed.) • LD broken (short circuit)
• Remedy: 1. Turn the main switch off and on. 2. Replace the LD unit.

• Code: SC260
• 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
• Remedy: 1. Turn the main switch off and on. 2. Check the sensor actuator position of the LD positioning motor. 3. Replace the LD positioning motor. 4. Replace the LD home position sensor. 5. Check and/or replace the PSU.

• Code: SC261
• Description: LD HP sensor not switched off (for K only) After the laser beam pitch was changed, it takes more than five seconds for the HP sensor to switch off.
• Causes: • Defective motor • Defective sensor • Mechanical problem when switching the actuator • Brown fuse (FU81) on the Power supply unit
• Remedy: 1. Turn the main switch off and on. 2. Check the sensor actuator position of the LD positioning motor. 3. Replace the LD positioning motor. 4. Replace the LD home position sensor. 5. Check and/or replace the PSU.

• Code: SC285
• Description: Line position adjustment (MUSIC) error Line position adjustment fails three consecutive times.
• Causes: • Pattern sampling error due to insufficient image density of patterns used for the adjustment • Inconsistency in the sampling line position adjustment pattern due to dust on the pattern, damage to the OPC drum, damage or toner dropped on the transfer belt, or a dirty or defective ID sensor
• Remedy: 1. Turn the main switch off and on. 2. Check and fix the problem that causes low image density. . 3. Clean or replace the transfer belt and/or the ID sensor. 4. Replace the PCU or clean the development unit that causes toner to drop on the transfer belt.

• Code: SC370
• Description: TD sensor [K]: Adjustment error During the developer initialization, the output value of the TD sensor is without the adjustment range (3.0 ± 0.1V).
• Causes: • Poor connection (TD sensor outputs is less than 0.5V.) • Defective TD sensor
• Remedy: 1. Turn the main switch off and on. 2. Reset the related color development unit. 3. Replace the related color development unit.

• Code: SC371
• Description: TD sensor [Y]: Adjustment error During the developer initialization, the output value of the TD sensor is without the adjustment range (3.0 ± 0.1V).
• Causes: • Poor connection (TD sensor outputs is less than 0.5V.) • Defective TD sensor
• Remedy: 1. Turn the main switch off and on. 2. Reset the related color development unit. 3. Replace the related color development unit.

• Code: SC372
• Description: TD sensor [C]: Adjustment error During the developer initialization, the output value of the TD sensor is without the adjustment range (3.0 ± 0.1V).
• Causes: • Poor connection (TD sensor outputs is less than 0.5V.) • Defective TD sensor
• Remedy: 1. Turn the main switch off and on. 2. Reset the related color development unit. 3. Replace the related color development unit.