Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-3
6.2.2 ROS Assembly Problem: Fault Code U2
There is a problem in the ROS Assembly.
Notes:
1. Without the diagnostic tool, skip step 2 and continue.
2. There is no corresponding control panel message for this item.
3. This FIP can also be used to fix a wavy image.
4. Try the engine self test.
1. INITIAL ANALYSIS
Inspect the following components. Are they compatible with your printer version, correctly
installed, not damaged, deformed, or contaminated?
ROS Assembly MCU PWB
LVPS Assembly ROS Harness Assembly
EP Cartridge CRU Actuator Assembly
CRU Sensor HVPS Harness Assembly
Yes No
Go to Step 2. Replace the problem components.
2. ROM DATA ANALYSIS
Is the Configuration Mode NV1 (Resolution) parameter correct?
Yes No
Go to Step 3. Correct the parameter to read NV11 (300 dpi).
3. ROS SCANNER ASSEMBLY ANALYSIS
Is the Scanner Motor running after you enter Printing Test Mode? If you cannot hear the Scanner
Motor over the noise from the Main Motor, disconnect P/J 14 on the MCU PWB.
Yes No
Go to Step 4. Go to Section 6.3.3 Scanner Assembly Failure.
4. ROS LASER DIODE ASSEMBLY ANALYSIS
Disconnect P/J 111 on HVPS. Perform this check within 30 seconds after switching power on.
After 30 seconds, the LVPS shuts down, due to a no-load condition. Is there +5VDC between
P/J12–7 and P/J12–6 on the MCU PWB?
Yes No
Go to Section 6.3.4 ROS Assembly Failure . Go to Step 5.