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

Page: 164 / 503

Phaser 5400 Laser Printer Service Guide 135
RAP 50 Registration Sensor
.
Table 79 Registration Sensor Troubleshooting Procedure
Step Actions and Questions Yes No
1
PROCEDURE
1. Open the Top Cover and remove the Print Cartridge.
2. Extend the MBF by lifting, then pulling toward you.
3. Enter Diagnostics mode.
4. From the Main Menu, select Component Test / Sensor
Input / press [4] to start, [0] to stop.
5. Actuate and deactuate the Registration Sensor.
Does the LCD counter increment each time you
press and release the actuator?
It appears
the
Registration
Sensor is
working
correctly. If
problem
persists,
replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 2.
2 REGISTRATION SENSOR ACTUATOR
INSPECTION
1. Visually inspect the Registration Sensor Actuator
through the open MBF door.
2. Manually actuate the Registration Sensor Actuator.
Does the actuator move freely and appear to be
in good condition (not broken or damaged)?
Go to
Step 3. Replace the
Registration
Sensor
Actuator
[RRP 4.2,
page 285 ].
3 “YES” FROM STEP 2 ABOVE
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. Disconnect P/J18 from the Print engine Controller
Board.
4. Switch printer power ON.
5. On the Print Engine Controller Board, measure the
voltage between P18-11 and frame ground, then
between P18-13 and frame ground.
Does the voltage m3.3 VDC between
both pins and frame ground?
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/J18 to the Print Engine Controller Board.
3. Enter Diagnostics mode.
4. From the Main Menu, select Component Test / Sensor
Input / press [4] to start, [0] to stop.
5. On the Print Engine Controller Board, measure the
voltage between P/J18-13 and frame ground.
Does the voltage m3.3 VDC when the
Registration Sensor is deactuated and 0.1 VDC
when actuated?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
Registration
Sensor
Actuator
[RRP 4.4,
page 287 ].