• Code: 121.09
• Description: Service fuser error Fuser temperature lag error The temperature is late in reaching a specified temperature within the specified time.
• 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: 121.10
• Description: Service fuser error Heat belt rotation failure Speed of belt rotation did not change within the specified time.
• 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: 121.11
• Description: Service fuser error Fuser temperature recovery failure. The status of the fuser temperature did not switch at the specified time.
• 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: 121.12
• Description: Service fuser error Incorrect fuser Wrong fuser is installed.
• Remedy: 1 POR the machine. Does the error continue? Replace the fuser assembly. Go to “Fuser assembly removal”. Problem resolved

• Code: 121.13
• Description: Service fuser error Fuser thermostat failure The Fuser Assembly Thermostat is broken.
• 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: 126.01
• Description: Service fuser error Fuser interface failure There is a a broken link between upper engine PCBA and the fuser.
• Remedy: 1 Check the fuser driver PCBA. Is the above component properly connected? Go to step 2. Replace the connections. 2 Replace the fuser driver PCBA. Go to “Fuser driver PCBA 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: 126.02
• Description: Service fuser error Fuser driver to upper engine PCBA interface failure There is a broken link between upper engine PCBA and the fuser
• Remedy: 1 Check the fuser driver PCBA. Is the above component properly connected? Go to step 2. Replace the connections. 2 POR the machine. Does the error continue? Go to step 3. Problem resolved 3 Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal”. Does the error continue? Replace the fuser driver PCBA. Go to “Fuser driver PCBA removal”. Problem resolved

• Code: 126.03
• Description: Service fuser error Fuser driver communication failure There is a communication error between the fuser and upper engine PCBA
• Remedy: 1 Remove the sub LVPS PCBA. Go to “Sub LVPS PCBA removal”. Check the fuser driver PCBA. Is the above component properly connected? Go to step 2. Replace the connections. 2 Replace the fuser driver PCBA. Go to “Fuser driver PCBA 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