• Code: 926...929
• Description: 926(K), 927(C), 928(Y), 929(M) - Toner Sensor Error
• Remedy: 1 Is the toner cartridge the correct type for the printer? Go to step 2. Recommend the customer replace the cartridge with the correct type. 2 Is the toner cartridge encoder wheel dirty? Clean the encoder wheel and toner sensor. Go to step 3. 3 Replace the toner cartridge for the color with the error. Did this fix the problem? Problem solved. Go to step 4. 4 Test the sensors. While actuating the sensor, does the voltage fluctuate between 0 V and +5 V between pins 1 and 4 and 5, 8 and 9, 12, and 13 on CN1 on the printer controller board. Replace the printer controller board. Replace the affected toner sensor.

• Code: 930
• Description: Yellow Printhead Error
• Remedy: 1 Check to ensure that the cables between the LED printhead and the printhead controller board as well as the cables between the printhead controller board and the printer controller board are properly connected. Are they properly connected? Go to step 2. Properly connect the cables. 2 Replace the LED printhead for the affected color. Did this resolve the problem? Problem solved. Replace the printhead controller board, and go to step 3. 3 Did replacement of the printhead controller board resolve the problem? Problem solved. Replace the printer controller board.

• Code: 931
• Description: Magenta Printhead Error
• Remedy: 1 Check to ensure that the cables between the LED printhead and the printhead controller board as well as the cables between the printhead controller board and the printer controller board are properly connected. Are they properly connected? Go to step 2. Properly connect the cables. 2 Replace the LED printhead for the affected color. Did this resolve the problem? Problem solved. Replace the printhead controller board, and go to step 3. 3 Did replacement of the printhead controller board resolve the problem? Problem solved. Replace the printer controller board.

• Code: 932
• Description: Cyan Printhead Error
• Remedy: 1 Check to ensure that the cables between the LED printhead and the printhead controller board as well as the cables between the printhead controller board and the printer controller board are properly connected. Are they properly connected? Go to step 2. Properly connect the cables. 2 Replace the LED printhead for the affected color. Did this resolve the problem? Problem solved. Replace the printhead controller board, and go to step 3. 3 Did replacement of the printhead controller board resolve the problem? Problem solved. Replace the printer controller board.

• Code: 933
• Description: Black Printhead Error
• Remedy: 1 Check to ensure that the cables between the LED printhead and the printhead controller board as well as the cables between the printhead controller board and the printer controller board are properly connected. Are they properly connected? Go to step 2. Properly connect the cables. 2 Replace the LED printhead for the affected color. Did this resolve the problem? Problem solved. Replace the printhead controller board, and go to step 3. 3 Did replacement of the printhead controller board resolve the problem? Problem solved. Replace the printer controller board.

• Code: 934
• Description: Color Drum Sensor Error
• Remedy: 1 Clean the color drum sensor LED. Did this fix the problem? Problem solved. Go to step 2 2 Swap the yellow photo developer with a different color photo developer. Did this fix the problem? Replace the photo developer that called the error. Go to step 3. 3 Is connector CN2 on the printer controller board connected properly? Replace the sub frame assembly. Plug the connector in securely. 4 Did replacing the sub frame fix the problem? Problem solved. Replace the printer controller board.

• Code: 935
• Description: Black Drum Sensor Error
• Remedy: 1 Clean the black drum sensor LED. Did this fix the problem? Problem solved. Go to step 2 2 Swap the black photo developer with a different color photo developer. Did this fix the problem? Replace the photo developer that called the error. Go to step 3. 3 Is connector CN2 on the printer controller board connected properly? Replace the sub frame assembly. Plug the connector in securely. 4 Did replacing the sub frame fix the problem? Problem solved. Replace the printer controller board.

• Code: 936...939
• Description: Cassette Error
• Remedy: 1 Are connectors CN8 and CN6 on the printer controller board connected properly? Replace the printer controller board. Plug the connector in securely.