Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-40
6.3.1 LVPS Assembly failure (+5VDC)
NOTES:
1. This FIP does not use the diagnostic tool.
2. There is no corresponding control panel message for this item.
3. Not much will operate without the 5V supply.
4. Check to see if the controller 5V power LED is on. If it is off, check the P/J 51 pins on
interconnect PWB for 5V. If 5V exists on P/J 51, reseat the controller and try again. If there is
no change, replace the ESS (controller).
1. INITIAL ANALYSIS
Inspect the
LVPS Assembly and MCU PWB
. Are they compatible with your printer version,
correctly installed, not damaged, deformed, or contaminated?
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. LVPS ANALYSIS
Disconnect P/J111 from the HVPS.
Switch ON Main Power.
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 +5VDC between J11–5 and J11–2 on the MCU PWB?
Is there +5VDC between J11–6 and J11–2 on the MCU PWB?
Yes No
Replace the MCU PWB. Go to Go to step 3.
3.
Is there 5 VDC between P/J 51-3 and P/J 51-5 on the Interconnect PWB?
Is there 5 VDC between P/J 5-4 and P/J 51-6 on the Interconnect PWB?
Yes No
Replace the controller (ESS). Replace the LVPS Assembly cable.