Xerox 2135DX - Phaser Color Laser Printer, Service Manual

Page: 50 / 199

Service Guide 37
Motor and fuser roller resistances
1.
Turn off the printer and disconnect the power cord.
2.
With a DMM set for measuring resistance, test each motor's windings for
correct resistance (disconnected from the printer).
Motor and fuser roller resistances
Motor Measure between ... Resistance
Yellow drum unit motor
Magenta drum unit motor
Cyan drum unit motor
Black drum unit motor Between motor Pins 1 and 2
Between motor Pins 3 and 4
All the drum motors connect to
connector ID at the top of the
engine controller board
Black
Pins 1 thru 4
Yellow Pins 5 thru 8
magenta Pins 9 thru 12
Cyan Pins 13 thru 16
~3
Ω
~3
Ω
Transfer belt motor
Registration motor
Fuser motor
Main feed drive motor Between motor Pins 1 and 2
Between motor Pins 3 and 4
The transfer belt motor
connects to connector
BELTHET pins 5 thru 8
The feed motor connects to
connector HOPFF pins 1 thru 4
The main motor connects to
connector HOPFF pins 5 thru 8
~8
Ω
~8
Ω
Tray lift motor Between motor Pins 1 and 2 ~100
Ω
Fuser unit
New fuser: The resistance
between pins C and D of the
lower roller will be O
Ω
, a fuse.
Used fuser: The fuse between
pins C and D of the lower roller
will be open. The fuse indicates
a new fuser and is blown within
seconds of being installed to
indicate a fuser now in use.
Upper Roller
Between Pins A and B
Between Pins C and D
Between Pins E and F
Lower Roller
Between Pins A and B
Between Pins C and D
Between Pins E and F
2
Ω
Open
~360 at 25
o
C
3
Ω
0
Ω
or open
(fuse)
~360 at 25
o
C
B A
C D E F
C D E F
B A
Underside of fuser
0728-02