• Code: 240-02
• Description: LD error: C
  The IPU detects LDB error a few times consecutively when LDB unit turns on after LDB initialization.
• Causes: • Worn-out LD • Disconnected or broken harness of the LD
• Remedy: 1. Replace the harness of the LD. 2. Replace the laser optics housing unit. 3. Replace the IPU.

• Code: 240-03
• Description: LD error: M
  The IPU detects LDB error a few times consecutively when LDB unit turns on after LDB initialization.
• Causes: • Worn-out LD • Disconnected or broken harness of the LD
• Remedy: 1. Replace the harness of the LD. 2. Replace the laser optics housing unit. 3. Replace the IPU.

• Code: 240-04
• Description: LD error: Y
  The IPU detects LDB error a few times consecutively when LDB unit turns on after LDB initialization.
• Causes: • Worn-out LD • Disconnected or broken harness of the LD
• Remedy: 1. Replace the harness of the LD. 2. Replace the laser optics housing unit. 3. Replace the IPU.

• Code: 270
• Description: GAVD communication error
  The 12C bus device ID is not identified during initialization. A device-status error occurs during 12C bus communication. The 12C bus communication is not established due to an error other than a buffer shortage.
• Causes: • Loose connection • Defective GAVD • Defective BCU • Defective controller board
• Remedy: 1. Turn the power switch off and on. 2. Check the cable connection. 3. Replace the laser optics-housing unit. 4. Replace the BCU.

• Code: 285
• Description: Line position adjustment (MUSIC) error
  Line position adjustment fails four consecutive times.
• Causes: • Pattern sampling error (insufficient image density) • Defective ID sensors for the line position adjustment • Defective image transfer belt unit • Defective PCDU(s) • Defective laser optics housing unit
• Remedy: 1. Check and reinstall the image transfer belt unit and PCDUs. 2. Check if each toner bottle has enough toner. 3. Replace the ID sensor. 4. Replace the image transfer belt unit. 5. Replace the PCDU(s). 6. Replace the laser optics housing unit.

• Code: 312-01
• Description: Charge P.P. output error [K]
  The feedback voltage of the charge AC for each color is 0.3 V or less for 0.2 seconds after the charge AC has turned on.
• Causes: • Disconnected or broken harnesses of the HVPS • Defective PCDU • Defective HVPS
• Remedy: 1. Check or replace the harnesses of the HVPS. 2. Reinstall or replace the PCDU. 3. Replace the HVPS.

• Code: 312-02
• Description: Charge P.P. output error [M]
  The feedback voltage of the charge AC for each color is 0.3 V or less for 0.2 seconds after the charge AC has turned on.
• Causes: • Disconnected or broken harnesses of the HVPS • Defective PCDU • Defective HVPS
• Remedy: 1. Check or replace the harnesses of the HVPS. 2. Reinstall or replace the PCDU. 3. Replace the HVPS.

• Code: 312-03
• Description: Charge P.P. output error [C]
  The feedback voltage of the charge AC for each color is 0.3 V or less for 0.2 seconds after the charge AC has turned on.
• Causes: • Disconnected or broken harnesses of the HVPS • Defective PCDU • Defective HVPS
• Remedy: 1. Check or replace the harnesses of the HVPS. 2. Reinstall or replace the PCDU. 3. Replace the HVPS.