Initial Actions; Table 66 Dc Power Loading Troubleshooting Procedure - Xerox 5400N - Phaser B/W Laser Printer Service Quick Reference Manual

RAP 41 DC Power Loading

Initial Actions

Perform RAP 40, DC Power (LVPS) Troubleshooting, before starting this RAP.
Warning: AC input voltages can be lethal. Use extreme care while
checking the voltages on the LVPS. Disconnect the power
cord while checking the continuity of fuses and removing
or reinstalling the components.
Table 66 DC Power Loading Troubleshooting Procedure
Step Actions and Questions
1 Switch the printer power OFF. Remove the Lower Rear
Cover (RRP 1.7 on
following from the LVPS:
P/J161 (Print Engine Controller PWB)
I
P/J163 (System Controller PWB)
I
P/J164 (Main Motor)
I
P/J165 (Main Fan)
I
P/J166 (LVPS Fan)
I
P/J168 (5VDC Power Supply)
I
Switch the printer power ON and measure the voltages
listed in Table 67 on the LVPS.
Are all the voltages correct?
2 1. Switch the printer power OFF.
2. Reconnect P/J161 to the LVPS.
3. Switch the printer power ON and measure the
voltages listed in Table 67.
Are all the voltages correct?
3 1. Switch the printer power OFF.
2. Remove the Left Side Cover and the Print Engine
Controller PWB Cover.
3. Reconnect all the P/Js to the LVPS.
4. Disconnect the following from the Print Engine
Controller PWB:
P/J11 (Laser)
I
P/J21 (Print Cartridge Sensor)
I
P/J14 (Toner Sensor)
I
P/J12 (Tray 1 Feed head components/Tray 1 Low
I
Paper Sensor)
P/J22 (Registration Clutch)
I
P/J13 (Feeder 2/3)
I
P/J17 (Fuser Control PWB / Fuser)
I
P/J19 (Duplex Assembly/OCT)
I
P/J18 (HVPS/Registration Sensor)
I
P/J20 (Tray 1 Size Sensor/MBF Home Sensor)
I
5. Switch the printer power ON and measure the
voltages listed in Table 67.
Are all the voltages correct?
116
page 256). Disconnect the
Yes
Go to Step 2.
Go to Step 5.
Go to Step 4.
Phaser 5400 Laser Printer Service Guide
No
Replace the
LVPS
(RRP 8.6 on
page 312).
Go to Step 3.
Replace the
Print Engine
Controller
PWB
(RRP 8.5 on
page 310).