• Code: 191.13
• Description: Service engine error Lower engine PCBA fuse 9 blown
• Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the toner dispense motor (Y, M, C, K) for overcurrent and overvoltage. Are the current and voltage values normal? Go to step 2. Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Problem resolved

• Code: 191.14
• Description: Service engine error Lower engine PCBA fuse 10 blown
• Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the following parts circuits for overcurrent and overvoltage: •2nd transfer roller contact retract motor •Printer left duplex door assembly Are the current and voltage values normal? Go to step 2. Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Problem resolved

• Code: 191.15
• Description: Service engine error Lower engine PCBA fuse 11 blown
• Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the following parts circuits for overcurrent and overvoltage: •Fuser motor •Registration drive motor Are the current and voltage values normal? Go to step 2. Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Problem resolved

• Code: 191.16
• Description: Service engine error Lower engine PCBA fuse 12 blown
• Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the following parts circuits for overcurrent and overvoltage: •PC/Developer drive motor •Fuser motor assembly Are the current and voltage values normal? Go to step 2. Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Problem resolved

• Code: 191.17
• Description: Service engine error Lower engine PCBA fuse 13 blown
• Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the PC/Developer drive motor (Y,M,C) circuits for overcurrent and overvoltage: Are the current and voltage values normal? Go to step 2. Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Problem resolved

• Code: 191.18
• Description: Service engine error Upper engine PCBA data failure
• Remedy: 1 POR The machine. Does the error continue? Go to step 2 Problem resolved 2 Install the correct version of the firmware. Does the problem persist? Turn the power OFF, and replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 191.19
• Description: Service engine error Upper engine PCBA access failure
• Remedy: 1 POR The machine. Does the error continue? Go to step 2 Problem resolved 2 Turn the power OFF and check whether there is poor connection between the EEPROM and the upper engine PCBA. Are there no problems with the connection? Turn the power OFF, and replace the upper printer engine assembly. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 191.20
• Description: Service engine error Upper engine PCBA buffer failure
• Remedy: 1 POR The machine. Does the error continue? Go to step 2 Problem resolved 2 Turn the power OFF, and check whether there is poor connection between the EEPROM and the upper engine PCBA. Are there no problems with the connection? Turn the power OFF, and replace the upper printer engine assembly. Go to “Upper printer engine PCBA removal” .