Xerox 5400N - Phaser B/W Laser Printer, Service Quick Reference Manual

Page: 160 / 503

Phaser 5400 Laser Printer Service Guide 131
7 “NO” FROM STEP 6 ABOVE
Measure the voltage between P/J21-3 and frame
ground.
Does the voltage P/J21-3 and frame ground
m5.0 VDC.
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 8.
8 “NO” FROM STEP 7 ABOVE
1. Switch printer power OFF.
2. Remove the Lower Rear Cover [RRP 1.7, page 256 ].
3. Disconnect P/J16 from the Print Engine Controller
Board.
4. Measure the resistance between pin 5 of the
disconnected plug and P/J161-10 on the LVPS.
Is there continuity between P16-5 and
P/J161-10?
Replace the
LVPS
[RRP 8.6,
page 312 ].
Replace the
Print Engine
Controller
Harness
[PL 9.2,
page 406 ].
9 “YES” FROM STEP 6 ABOVE
Measure the voltage between P/J21-3 and frame
ground.
Does the voltage between P/J21-3 and frame
ground m5.0 VDC?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 10.
10 PRINT CARTRIDGE TAB
1. Open the Top Cover and remove the Print Cartridge.
2. Inspect the tab on the left side of the Print Cartridge
that actuates the Print Cartridge Switch.
Is the tab on the Print Cartridge intact?
Go to
Step 11. Replace the
Print
Cartridge
[PL 8.1,
page 402 ].
11 LASER SAFETY SWITCH ACTUATOR
Press and release the Laser Safety Switch Actuator.
Does the Laser Safety Switch Actuator lever
move smoothly?
Go to
Step 12. Replace the
CRUM PWB
[RRP 3.7,
page 281 ].
12 “YES” FROM STEP 11 ABOVE
1. Switch printer power OFF.
2. Install the Print Cartridge.
3. Leave the Top Cover open.
4. Disconnect P/J21 from the Print Engine Controller
Board.
5. Check for continuity between J21-4 and J21-3 as you
lift and lower the cartridge.
Is there continuity between J21-4 and J21-3
when you lower the cartridge and no continuity
when you lift the cartridge?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
CRUM PWB
[RRP 3.7,
page 281 ].
13 “YES” FROM STEP 5 ABOVE
1. Run a test print while measuring the voltage between
P/J11-5 and frame ground.
2. Run a test print while measuring the voltage between
P/J11-6 and frame ground.
Does the voltage on both pins change from
0.0 VDC to +1.1 VDC and back to 0.0 VDC?
Go to
Step 14. Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Table 77 Laser Assembly Troubleshooting Procedure (cont'd.)
Step Actions and Questions Yes No