Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 83

Main Motor Failure Troubleshooting Procedure (cont'd.)
Step Actions and Questions
3 1. Remove the Fuser Assembly (RRP 6.2 on
page 6-66).
2. Manually rotate the rotor of the Motor clockwise.
Does the rotor of the Main Motor rotate
smoothly?
4 Remove the Main Motor (RRP 8.1 on
Manually rotate the rotor of the Motor clockwise.
Does the rotor of the Main Motor rotate
smoothly?
5 Open the Front Cover and remove the Print Cartridge.
Rotate the Metal Registration Roller manually.
Do the Metal and Rubber Registration Rolls
rotate smoothly?
6 1. With the Front Cover open, cheat the Front Cover
Interlock.
2. Enter Service Diagnostics and select Motor/Fans
Tests.
3. Scroll to Main Motor and press OK.
4. Visually inspect the Main Motor and Main Drive
Gears.
Do the Main Motor and drive gears run smoothly
and are all drive gears in good condition?
7 1. Press the Back key twice to return to top Menu.
2. Select Main Motor+Clutches/Sol Tests.
3. Scroll to Motor+MPT Sol and press OK.
Does the MPT Feed Roller Assembly rotate
smoothly?
8 Scroll to Motor+Tray 1 Turn Roll and press OK.
Note: If optional feeders are installed, all turn rollers
should actuate when you press OK.
Do all Turn Roller Shafts rotate smoothly?
2-46
page 6-84).
Phaser 4400 Laser Printer Service Manual
Yes No
Replace the Go to step 4.
Fuser
Assembly
(RRP 6.2 on
)
page 6-66 .
Replace the Replace the
Main Drive Main Motor
Gear (RRP 8.1 on
Assembly page
(RRP 8.2 on
page 6-85)
Go to step 6. Replace the
Registration
Rolls (RRP
5.6 on
page
or clutch
(RRP 5.5 on
page
as
necessary.
Go to step 7. Go to RRP
8.1 on
page 6-84
and RRP 8.2
on
page
Go to step 8. Replace the
MPT Feed
Roller
components
as necessary
(RRP 4.2,
page
RRP 4.3,
page
Go to step 9. Repair or
replace the
appropriate
Turn Roller
Assembly
(RRP 3.2,
page 6-29
RRP 11.8,
page
6-84).
6-62)
6-62),
6-85.
6-45/
6-47).
or
6-127).