• Code: 120.02
• Description: Service fuser error Fuser pressure roll retract motor failure
• Remedy: 1 Check the fuser pressure roll retract motor. Is the above component properly connected? Go to step 2. Replace the connections. 2 Replace the fuser pressure roll retract motor. Go to “Fuser pressure roll retract motor removal” . Does the error remain? Go to step 3. Problem resolved 3 Check the fuser assembly. Is the above component properly connected? Go to step 2. Replace the connections. 4 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 5 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal” . Go to step 6. Problem resolved 6 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.01
• Description: Service fuser error Encoder pulse fail
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.03
• Description: Service fuser error Heat belt (center) disconnection error
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Remove foreign particles, and replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.04
• Description: Service fuser error Heat belt (center) overheat error
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Remove foreign particles, and replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.05
• Description: Service fuser error Heat belt (rear) disconnection error
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Remove foreign particles, and replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.06
• Description: Service fuser error Heat belt (rear) overheat error
• Remedy: 1 Check the heat roll. Is the heat roll free of any media or foreign particles? Go to step 2. Remove foreign particles, and replace the connections. 2 Check the fuser assembly. Is the above component properly connected? Go to step 3. Replace the connections. 3 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 4. Problem resolved 4 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.07
• Description: Service fuser error Heat belt (center) temperature increase failure
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Remove foreign particles, and replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 3. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved

• Code: 121.08
• Description: Service fuser error Heat belt (rear) temperature increase failure
• Remedy: 1 Check the fuser assembly. Is the above component properly connected? Go to step 2. Remove foreign particles, and replace the connections. 2 Replace the fuser assembly. Go to “Fuser assembly removal” . Does the error remain? Go to step 4. Problem resolved 3 POR the machine. Does the error continue? Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” . Problem resolved