• Code: 9500
• Description: ISC PWB error A
• Remedy: Main PWB ISC PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Main PWB (YC25) and ISC PWB (YC4) 2. Replace the main PWB. 3. Replace the ISC PWB 4. Contact the Service Support.

• Code: 9510
• Description: ISC PWB error B
• Remedy: Main PWB DP SHD PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DP relay PWB (YC2) and DP SHD PWB (YC3) 2. Replace the main PWB. 3. Replace the DP SHD PWB. 4. Contact the Service Support.

• Code: 9520
• Description: ISC PWB error C
• Remedy: Main PWB ISC PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. 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, 9540
• Description: Machine recovery error The machine may not be recovered or may have trouble in its function with changes of the internal data when replacing some the parts at the same time.
• Remedy: PWBs 1. Reattach the parts below in case of replacing 2 or more of them at the same time. Affected parts : Memory, HDD, PWBs * : Do not replace 2 or more of the parts at the same time * : And also, do not execute the following works when replacing the above parts. Do not replace the drum unit or the developing unit. Do not replace the drum unit with the one color for other one in the same machine.

• Code: 9940
• Description: Confidential document guard uninstalled error The confidential document guard PWB is removed while the confidential document guard PWB is valid.
• Remedy: Confidential document guard PWB 1. Check that the confidential document guard PWB is firmly installed and, if not, install firmly. 2. Replace the confidential document guard PW.

• Code: 9950
• Description: Confidential document guard PWB error FPGA configuration error CPU version information error This is caused when the PWB of a double-side scanning DP is connected, the confidential guard PWB is inserted, and the harness is not correctly connected.
• Remedy: Confidential document guard PWB 1. Reinsert the FFC connector if its connection is loose. 2. Replace the confidential document guard PW. 3. Replace the main PWB.

• Code: F000
• Description: Communication error between main PWB and operation 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
• Description: Main PWB checksum error
• Remedy: Main PWB 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. If not corrected, replace the main PWB.