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IBM Infoprint 1130/1140
990 Service Error displays
FRU
1
Mechanical Linkage
DC Motor Assembly
2
Control Board
2-104
Service Manual
Action
Check the DC motor cable connector
to be sure it is correctly installed at J2
on the control board. If correct,
disconnect J2 from the control board
and check the resistance of the motor
on the cable connector. J2-1 to J2-2
measures between 115 and 135
ohms. Also check J2-1 and J2-4 to the
motor case for shorts. If either the
resistance is incorrect or a short if
found, replace the mechanical linkage/
DC motor assembly.
Note: If the DC motor is shorted, it
may also be necessary to replace the
control board.
Disconnect the motor cable J2 from
the control board and check the
voltages at J2 on the board.
Note: Use caution not to short
adjacent pins on the connector as
damage to the board could result.
J2-1 (motor idle) +24 V dc
J2-2 (motor Idle) +24 V dc
J2-5 (motor idle) +5 V dc
J2-6 (motor idle) +5 V dc
If any of the voltages are incorrect,
replace the control board. If correct,
replace the mechanical linkage/ DC
motor assembly.
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