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Diagnostic Information 2-87
4069-XXX
990 Service Error displays
FRU Action
1 Mechanical Linkage
DC Motor Assembly
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.
2 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) +24V dc
J2-2 (Motor Idle) +24V dc
J2-5 (motor idle) +5V dc
J2-6 (motor idle) +5V dc
If any of the voltages are incorrect,
replace the control board. If correct,
replace the mechanical linkage/ DC
motor assembly.