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Carriage Motor (2851pm)
Motor End
Resistance
Component
Plug Pins
Values
Description
5 and 1
1.3 ohms
A-phase
5 and 2
1.3 ohms
NotA
6 and 3
1.3 ohms
8-phase
6 and 4
1.3 ohms
Not 8
Cable End
Resistance
Component
Plug Pins
Values
Description
7 and 5
7 ohms R1
A-phase common
resistor
8and 6
7 ohms R4
8-phase common
resistor
1 and 2
C1
1
A-phase capacitor
3 and 4
C2
1
8-phase capacitor
Phase
Plug
Checked
No.
Driver
A
P7-1
A23842
(not) A
P7-2
A23B49
8
P7-3
A23844
(not) 8
P7-4
A23845
A (com)
P7-7
A23862
8 (com)
P7-8
A23864
1
Set ohmmeter to 1 K scale. The ohmmeter needle
must go toward zero and back to infinity. Failure to
do so indicates a defective capacitor.
4-104
3
2
6
5
4
0
0
0
9
8
7
Plug Side
Motor
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