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

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Phaser 5400 Laser Printer Service Guide 151
RAP 58 Toner Sensor Assembly
.
Table 88 Toner Sensor Assembly Troubleshooting Procedure
Step Actions and Questions Yes No
1
PROCEDURE
1. Switch printer power OFF.
2. Remove the Left Side Cover [RRP 1.1, page 250 ] and
the Print Engine Controller Board Cover [RRP 8.5,
page 310 ].
3. Open the Top Cover and remove the Print Cartridge.
4. Cheat the Top Cover Interlock.
5. Disconnect P/J14 from the Print Engine Controller
Board.
6. Switch printer power ON.
7. Measure the voltage between P14-1 on the Print
Engine Controller Board and frame ground.
Does the voltage m2.0 VDC?
Go to
Step 3. Go to
Step 2.
2
“NO” FROM STEP 1 ABOVE
Measure the voltage between P/J16-9 on the Print
Engine Controller Board and frame ground.
Does the voltage m 24.0 VDC?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
LVPS
[RRP 8.6,
page 312 ].
3 “YES” FROM STEP 1 ABOVE
Measure the voltage between P14-3 and frame ground.
Does the voltage m5.0 VDC?
Go to
Step 4. Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
4 “YES” FROM STEP 3 ABOVE
1. Switch printer power OFF.
2. Reconnect P/J14.
3. Switch printer power ON.
4. Raise and lower the Print Cartridge approximately 2
inches (50.8 mm) while measuring the voltage
between P/J14-3 and frame ground.
Does the voltage m5.0 VDC when the
cartridge is in place and 0.0 VDC when the
cartridge is raised?
Problem
solved. Go to
Step 5.
5 TONER SENSOR HARNESS CONTINUITY
CHECK
1. Switch printer power OFF.
2. Disconnect P/J14 from the Print Engine Controller
Board and P/J 141 from the Toner Sensor.
3. Check for continuity between all pins of P/J14 and
P/J141.
Is there continuity between all the pins tested?
Replace the
Toner
Sensor
Assembly
[RRP 7.3,
page 301 ].
Repair or
replace the
Toner
Sensor
Harness
[PL 8.1,
page 402 ],
as
necessary.