• Code: 9520
• Description: ISC PWB error C
• Causes: Main PWB. ISC PWB
• Remedy: 1. Reinsert the connector if it its connection is loose. Main PWB (YC25) and ISC PWB (YC4) 2. Replace the main PWB. 3. Replace the ISC main PWB 4. Contact the Service Support.

• Code: 9530
• Description: Machine number backup error C
• Causes: Device error
• Remedy: Contact the Service Support.

• Code: 9540
• Description: Machine number backup error D
• Causes: Data error
• Remedy: Contact the Service Support.

• Code: 9550
• Description: Machine number backup error E
• Causes: Operation error
• Remedy: Contact the Service Support.

• Code: F000
• Description: Communication error between main PWB and operation PWB
• Causes: Main PWB
• Remedy: Main PWB 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the wirings and connetors between the main circuit PWB and the operation circuit PWB and between the main circuit PWB and the HDD are normal. Main PWB (YC12,YC17,YC30) and Operation PWB (YC1,YC2,YC3) 3. Check that the DDR memories in the main circuit PWB are well conducted and, if not, replace. 4. Execute U024 to initialize (FULL) the HDD. 5. Execute U021 to initialize memory. 6. Replace the Main PWB. 7. Copy the log File saved in the HDD by U964 in USB memory and contact the service support.
  Operation PWB Replace the operation PWB.

• Code: F010 ... F013
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. If not corrected, replace the main PWB.

• Code: F020 ... F023
• Description: System memory error
  Controller detection error
• Causes: Defective main PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. If not corrected, replace the main PWB.

• Code: F040
• Description: Communication error
  between Main PWB and Print engine
• Causes: Main PWB. Engine PWB. HDD
• Remedy: Main PWB 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the engine PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check that the FCC wire connecting between the main PWB (YC3) and the engine PWB (YC46) is normal and, if necessary, re-insert.Or, replace the FCC wire. 4. If not corrected, replace the main PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  HDD Replace the HDD.