Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-45
6.3.4 ROS Assembly failure continued
3. SCANNER MOTOR ACTUATOR SIGNAL ANALYSIS
Disconnect P/J111 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.
Switch ON Main Power.
Determine the print resolution of the printer, and take the corresponding voltage readings at
P/J12 on the MCU PWB.
Are the voltages measured correct for your printer resolution?
Yes No
Go to Step 4. Replace the MCU PWB.
4. ROS PWB POWER SUPPLY ANALYSIS
Is there +5VDC between J19–3 and J19–1 on the MCU PWB?
Yes No
Go to Step 5. Go to Section 6.3.2 LVPS Assembly Failure (+5VDC)
5.
Replace the MCU PWB.
Is the problem still present?
Yes No
Go to Step 6. Problem solved.