Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-47
6.3.5 Heater Rod Failure
NOTES:
1. The diagnostic tool is not used in this FIP.
2. There is no corresponding control panel message. Everything appears normal, but no printing
occurs.
3. This FIP may also fix fuser problems.
4. Do not use this FIP unless you plan on disassembling the fuser. FRUs are not supported.
Look for the fuser lamp to light, reseat fuser, and replace fuser.
1. INITIAL ANALYSIS
Inspect the following components. Are they compatible with your printer version, correctly
installed, not damaged, deformed, or contaminated?
• LVPS Assembly MCU PWB
• ROS Assembly CRU Sensor PWB
• Heater Rod Fuser Assembly
• Temperature Sensor Assembly
Inspect the printer paper path. Is it clear of foreign matter, such as staples, paper clips, and
paper scraps?
Yes No
Go to Step 2. Replace the problem components.
2. HEATER ROD ANALYSIS
Unplug the AC power cord from the back of the printer.
Is there continuity (0
ΩΩ
) between J101–2 and J101–6 (100V Model) on the Fuser Assembly?
Is there continuity (0
ΩΩ
) between J101–3 and J101–6 (220V Model) on the Fuser Assembly?
Yes No
Go to Step 3. Go to Step 4.
3. LVPS ASSEMBLY ANALYSIS
Disconnect P/J 111 from the HVPS.
Perform these checks within 30 seconds after switching power ON. After 30 seconds, the LVPS
shuts down due to the no–load condition.
Is there +4.2VDC between J11–1 and J11–2 on the MCU PWB?
Yes No
Go to Step 4. Replace the LVPS.