• Code: 54.06.21
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Primary laser/scanner beam detect abnormality
• Remedy: 1. Turn the product off, and then on. 2. If the product has had parts removed or replace, check the connector (J86) on the DC controller PCA. 3. If the error persists, replace the laser/scanner assembly.

• Code: 55.00.YY
• Display: 55.00.YY DC controller error To continue turn off then on
• Description: DC controller PCA error - 55.00.01 (event code) DC controller memory error - 55.00.03 (event code DC controller no engine response - 55.00.04 (event code DC controller communications timeout
• Remedy: Turn the product off, and then on. If the error persists, replace the DC controller PCA.

• Code: 55.0X.YY
• Display: 55.0X.YY DC controller error To continue turn off then on
• Description: DC controller PCA error - 55.01.06 (event code) NVRAM memory data error warning - 55.02.06 (event code) NVRAM memory access error warning
• Remedy: Turn the product off, and then on. If the error persists, replace the DC controller PCA.

• Code: 56.00.YY
• Display: 56.00.YY Error To continue turn off then on
• Description: Optional paper trays communication error
• Remedy: Turn the product off, and then on. If the error persists, reseat the optional paper trays (1 x 500-sheet feeder and/or 3 x 500-sheet feeder). Check the input connectors for damage. If a connector is damaged, replace the connector.

• Code: 57.00.01
• Display: 57.00.0Y Error To continue turn off then on
• Description: Fan error
  Main fan (FM101) failure
• Remedy: 1. Turn the product off, and then on. Listen for fan noise at the back corner of the product. If no noise is heard, replace the power supply fan (FM101). 2. If this part has been removed or replace, check the connector (J95) on the DC controller PCA and the connector (J64) on the low-voltage power supply assembly. 3. If the error persists, replace the main fan (FN101).

• Code: 57.00.02
• Display: 57.00.0Y Error To continue turn off then on
• Description: Fan error
  Laser/scanner fan (FN102) failure
• Remedy: 1. If this part has been removed or replace, check the connector (J75) on the DC controller PCA. 2. If the error persists, replace the laser/scanner fan (FN102).

• Code: 57.00.03
• Display: 57.00.0Y Error To continue turn off then on
• Description: Fan error
  Cartridge fan (FM301) failure
• Remedy: 1. If this part has been removed or replace, check the connector (J95) on the DC controller PCA. 2. Check the connector (J66) on the engine power supply PCA. 3. If the error persists, replace the cartridge fan (FM301).

• Code: 57.00.04
• Display: 57.00.0Y Error To continue turn off then on
• Description: Fan error
  Cartridge front-side fan (FM103) failure
• Remedy: 1. Turn the product off, and then on. Listen for fan noise at the middle back of the product. If no noise is heard, replace the cartridge front-side fan (FM103). 2. If this part has been removed or replace, check the connector (J79) on the DC controller PCA. 3. If the error persists, replace the cartridge front-side fan (FM103).