• Code: 389.609
• Description: RC Sample Block Fail-B-#2-Out. During the B (rough adjustment pattern) patch detection, the #2 (Magenta) patch at the MOB Sensor Out side did not satisfy the defined number of valid sample blocks. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check the density of M color. Is the density of M color normal? Y↓ N→Adjust to correct the density of M color. Check the connection between the MOB Sensor In P/J151 and the MCU PWB P/J415 for connector disconnection, open circuit, short circuit, and poor contact. Is the connection normal? Y↓ N→Connect the MOB Sensor Out P/J151 to the MCU PWB P/J415 properly. Check the M Magnet Roll for contamination, scratches, and distortion. Is the Magnet Roll normal? Y↓ N→Replace the Developer (M) (PL 5.2 Item 8). Check the Transfer Belt for contamination, scratches, and distortion. Is the Transfer Belt normal? Y↓ N→Replace the IBT Assembly. Check the M Imaging Unit for contamination, scratches, and distortion. Is the Imaging Unit normal? Y↓ N→Replace the Imaging Unit (M) Replace the MOB ADC Assembly. If the problem persists, replace the MCU PWB.

• Code: 389.610
• Description: RC Sample Block Fail-B-#3-In. During the B (rough adjustment pattern) patch detection, the #3 (Cyan) patch at the MOB Sensor In side did not satisfy the defined number of valid sample blocks. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check the density of C color. Is the density of C color normal? Y↓ N→Adjust to correct the density of C color. Check the connection between the MOB Sensor In P/J150 and the MCU PWB P/J415 for connector disconnection, open circuit, short circuit, and poor contact. Is the connection normal? Y↓ N→Connect the MOB Sensor In P/J150 to the MCU PWB P/J415 properly. Check the C Magnet Roll for contamination, scratches, and distortion. Is the Magnet Roll normal? Y↓ N→Replace the Developer (C) (PL 5.2 Item 7). Check the Transfer Belt for contamination, scratches, and distortion. Is the Transfer Belt normal? Y↓ N→Replace the IBT Assembly Check the C Imaging Unit for contamination, scratches, and distortion. Is the Imaging Unit normal? Y↓ N→Replace Imaging Unit (C). Replace the MOB ADC Assembly. If the problem persists, replace the MCU PWB.

• Code: 389.612
• Description: RC Sample Block Fail-B-#3-Out. During the B (rough adjustment pattern) patch detection, the #3 (Cyan) patch at the MOB Sensor Out side did not satisfy the defined number of valid sample blocks. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check the density of C color. Is the density of C color normal? Y↓ N→Adjust to correct the density of C color. Check the connection between the MOB Sensor Out P/J151 and the MCU PWB P/J415 for connector disconnection, open circuit, short circuit, and poor contact. Is the connection normal? Y↓ N→Connect the MOB Sensor Out P/J151 to the MCU PWB P/J415 properly. Check the C Magnet Roll for contamination, scratches, and distortion. Is the Magnet Roll normal? Y↓ N→Replace the Developer (C) (PL 5.2 Item 7). Check the Transfer Belt for contamination, scratches, and distortion. Is the Transfer Belt normal? Y↓ N→Replace the IBT Assembly. Check the C Imaging Unit for contamination, scratches, and distortion. Is the Imaging Unit normal? Y↓ N→Replace Imaging Unit (C). Replace the MOB ADC Assembly. If the problem persists, replace the MCU PWB.

• Code: 389.613
• Description: RC Sample Block Fail-B-#4-In. During the B (rough adjustment pattern) patch detection, the #4 (Black) patch at the MOB Sensor In side did not satisfy the defined number of valid sample blocks. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check the density of K color. Is the density of K color normal? Y↓ N→Adjust to correct the density of K color. Check the connection between the MOB Sensor In P/J150 and the MCU PWB P/J415 for connector disconnection, open circuit, short circuit, and poor contact. Is the connection normal? Y↓ N→Connect the MOB Sensor In P/J150 to the MCU PWB P/J415 properly. Check the K Magnet Roll for contamination, scratches, and distortion. Is the Magnet Roll normal? Y↓ N→Replace the Developer (K) (PL 5.2 Item 6). Check the Transfer Belt for contamination, scratches, and distortion. Is the Transfer Belt normal?Y N Replace the IBT Assembly. Check the K Imaging Unit for contamination, scratches, and distortion. Is the Imaging Unit normal? Y↓ N→Replace the Imaging Unit (K) Replace the MOB ADC Assembly. If the problem persists, replace the MCU PWB.

• Code: 389.615
• Description: RC Sample Block Fail-B-#4-Out. During the B (rough adjustment pattern) patch detection, the #4 (Black) patch at the MOB Sensor Out side did not satisfy the defined number of valid sample blocks. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check the density of K color. Is the density of K color normal? Y↓ N→Adjust to correct the density of K color. Check the connection between the MOB Sensor Out P/J151 and the MCU PWB P/J415 for connector disconnection, open circuit, short circuit, and poor contact. Is the connection normal? Y↓ N→Connect the MOB Sensor Out P/J151 to the MCU PWB P/J415 properly. Check the K Magnet Roll for contamination, scratches, and distortion. Is the Magnet Roll normal? Y↓ N→Replace the Developer (K) (PL 5.2 Item 6). Check the Transfer Belt for contamination, scratches, and distortion. Is the Transfer Belt normal? Y↓ N→Replace the IBT Assembly(PL 6.1) Check the K Imaging Unit for contamination, scratches, and distortion. Is the Imaging Unit normal? Y↓ N→Replace the Imaging Unit (K). Replace the MOB ADC Assembly. If the problem persists, replace the MCU PWB.

• Code: 389.616
• Description: RC Data Over Flow Fail. The correction setting value of calculation result has exceeded the settable range. (This is a hidden failure. The Color Regi Spec cannot be guaranteed and Data is only recorded in history.)
• Remedy: Is the item that has reached the adjustment range (MIN or MAX), "Fast Scan Margin" or "Slow Scan Margin"? Y↓ N→Check the following: • Check that the value of dc131 NVM Read/Write [760-024] is "0". • The Imaging Unit (Y, M, C, K) for improper installation. If no problems are found, replace the following parts in sequence: • Imaging Unit (Y, M, C, K) • LPH Unit (Y, M, C, K) • Rear Holder Assembly Is the item that has reached the adjustment range (MIN or MAX) "Slow Scan Margin"? Y↓ N→Raise/lower the LPH (Y, M, C, K) 2 to 3 times to check the LPH lift up/down mechanism. If the problem persists, replace the LPH Unit (Y, M, C, K). Replace the MCU PWB.

• Code: 389.617
• Description: RC Lead Regi Over Range Fail. The result from adding the offset value to the color registration correction value has exceeded the settable range. (This is a hidden failure. The Alignment Lead Regi or Skew might have exceeded the adjustable range and Data is only recorded in history.)
• Remedy: 1. Check that the value of dc131 NVM Read/Write [760-063] is "0". (Because this Fail occurs only when the NVM write data is incorrect or the NVM is corrupted, if the setting value is not "0", reset it to "0".) 2. Check that the value of DC131 [760-082] is between the values of DC131 [760-084] and DC131 [760-085]. (If it is not, set the value of DC131 [760-082] to be between the values of DC131 [760-084] and DC131 [760-085].) 3. Check that the value of DC131 [760-083] is between the values of DC131 [760-084] and DC131 [760-085]. (If it is not, set the value of DC131 [760-083] to be between the values of DC131 [760-084] and DC131 [760-085].)

• Code: 389.625
• Description: RC Data Linearity Fail Y. The result from adding the skew/bow correction value to the Y color linearity correction value has exceeded the settable range. (This is a hidden failure. The LPH Slow Scan linearity cannot be guaranteed and Data is only recorded in history.)
• Remedy: Check that the value stored in LPH (Y) EEPROM is correct. Has any Y color related Chain No. 061 Fail occurred? Y↓ N→Check the following: • Check that the value of dc131 NVM Read/Write [760-024] is "0". • The Imaging Unit (Y) for improper installation. If no problems are found, replace the following parts in sequence: • Imaging Unit (Y) • LPH Unit (Y) • Rear Holder Assembly (Y) Replace the LPH Unit (Y). If the problem persists, replace the MCU PWB.