• Code: 042-700
• Description: IOT Over Heat Stop IOT Over Heat Stop
• Causes: • Fuser Assembly (PL7.1.1) • Heater Harness Assembly (PL7.1.5) • Top Harness Assembly (PL18.2.5) • LVPS (PL18.1.34) • MCU Board (PL18.1.13)
• Remedy: 1 Check the Fuser Assembly installation Are the Fuser Assembly, and the drawer connector (DP/J281) of the printer installed properly (without a bent pin, or any foreign or burnt objects, etc.)? Go to step 2. Reinstall the Fuser Assembly. 2 Check the Fuser Assembly connection Check the connection between the Fuser Assembly and the MCU Board, and the connection between the Fuser Assembly and the LVPS. Are P/J281, P/J28, and P/J47 connected securely? Go to step 3. Connect P/J281, P/J28, and P/J47 securely. 3 Check the connections between LVPS and the MCU Board Check the connection between the LVPS and the MCU Board. Are P/J508 and P/J29 connected securely? Go to step 4. Connect P/J508 and P/J29 securely. 4 Check the Heater Harness Assembly continuity. Is each cable of P/J281<=>P/J47 continuous? Go to step 5. Replace the Heater Harness Assembly. 5 Check the Top Harness Assembly continuity. Is each cable of P/J281<=>P/J28 continuous? Go to step 6. Replace the Top Harness Assembly. 6 Check the power to the Fuser Assembly (+5 VDC) Check if the voltage between the MCU Board ground and the P/J28-2 pin is about +5 VDC. Go to step 7. Refer to “+5 VDC Power FIP”. 7 Check after replacing the Fuser Assembly Replace the Fuser Assembly. Does the error still occur? Go to step 8. Finished. 8 Check after replacing the LVPS Replace the LVPS. Does the error still occur? Replace the MCU Board. Finished.

• Code: 046-310
• Description: IOT HVPS Error Detect HVPS Error
• Causes: • Transfer HVPS Board (PL18.1.28) • Development HVPS Board (PL18.1.14) • MCU-HVPS Flat Flex Cable (PL18.2.7) • HVPS Harness Assembly (PL18.2.6) • MCU Board (PL18.1.13)
• Remedy: 1 Check the Transfer HVPS Board connection Check the connection between the Transfer HVPS Board and the Development HVPS Board. Are P/J1821 and P/J182 connected securely? Go to step 2. Connect P/J1821 and P/J182 securely. 2 Check the continuity between the Transfer HVPS Board and the Development HVPS Board Is each cable of P/J1821<=>P/J182 continuous? Go to step 3. Replace the HVPS Harness Assembly. 3 Check the Development HVPS Board connection Check the connection between the Development HVPS Board and the MCU Board. Are P/J181 and P/J18 connected securely? Go to step 4. Connect P/J181 and P/J18 securely. 4 Check after replacing the MCU-HVPS Flat Flex Cable Replace the MCU-HVPS Flat Flex Cable. Does the error still occur? Go to step 5. Finished. 5 Check after replacing the Transfer HVPS Board Replace the Transfer HVPS Board. Does the error still occur? Go to step 6. Finished. 6 Check after replacing the Development HVPS Board Replace the Development HVPS Board. Does the error still occur? Replace the MCU Board. Finished.

• Code: 050-111
• Description: IOT Rear Cover Paper Jam Detected Zone IOT Rear Cover
• Causes:
• Remedy: 1. Open the Rear Cover 2. Remove any jammed paper 3. Close the Rear Cover

• Code: 050-112
• Description: MSI Paper Jam Detected Zone MSI
• Causes:
• Remedy: 1. Pull out papers on the Bypass Tray 2. Pull out Bypass Tray 3. Pull out Tray1 4. Remove any jammed paper 5. Push Tray1 back in 6. Push Bypass Tray back in

• Code: 050-121
• Description: IOT Remain Zone 1T JAM Paper Jam Detected Zone 1T
• Causes:
• Remedy: Open Tray1 & Remove paper

• Code: 050-122
• Description: IOT Remain Zone 2T JAM Paper Jam Detected Zone 2T
• Causes:
• Remedy: Open Tray2 & Remove paper

• Code: 050-129
• Description: IOT Rear Cover and MSI Paper Jam Detected Zone IOT RearCover and MSI
• Causes:
• Remedy: 1. Pull out papers on the Bypass Tray 2. Pull out Bypass Tray 3. Pull out Tray1 4. Remove any jammed paper 5. Push Tray1 back in 6. Push Bypass Tray back in 7. Open the Rear Cover if cannot remove any jammed paper 8. Remove any jammed paper 9. Close the Rear Cover

• Code: 061-370
• Description: IOT ROS Failure Detect ROS Failure
• Causes: • Laser Unit (PL2.1.1) • Top Harness Assembly (PL18.2.5) • LVPS (PL18.1.34) • MCU Board (PL18.1.13)
• Remedy: 1 Check the Laser Unit connection Check the connection between the Laser Unit and the MCU Board, and the connection between the Laser Unit and the PWBA LVPS. Are P/J36, P/J11, and PJ43 connected securely? Go to step 2. Connect P/J36, P/J11, and PJ43 securely. 2 Check the continuity between the LVPS and the Laser Unit Is each cable of P/J43<=>P/J431 continuous? Go to step 3. Replace the Top Harness Assembly. 3 Check the power to the Laser Unit (+5 VDC) Close the interlock switch(es), and check if the voltage between the LVPS ground and the P/J43-2 pin is about +5 VDC. Go to step 4. Replace the LVPS. 4 Check the power to the Laser Unit (+24 VDC) Close the interlock switch(es), and check if the voltage between the MCU Board ground and the P/J36-1 pin is about +24 VDC. Go to step 5. Refer to “+24 VDC Power FIP”. 5 Check the power to the Laser Unit (+3.3 VDC) Check if the voltage between the MCU Board ground and the P/J11-1 pin is about +3.3 VDC. Go to step 6. Refer to “+3.3 VDC Power FIP”. 6 Check after replacing the Laser Unit Replace the Laser Unit. Does the error still occur? Replace the MCU Board. Finished.