TM 55-4920-429-13
(12) Disconnect the multimeter.
(13) Connect the digital multi meter, set to measure dc volts, across the pins listed below. Set
CCDA BRAKE and CCDA CLUTCH switches to the position listed. The multimeter shall read the
voltage listed.
DIGITAL
DIGITAL
MULTIMETER
BRAKE
CLUTCH
MULTIMETER
CONNECTION
SWITCH
SWITCH
READING
J1-c (+) ToJ1-C
OFF
OFF
0 Vdc
J1-c (+) ToJ1-C
ON
OFF
0 Vdc
J1-c (+) ToJ1-C
OFF
ON
+26 To +30 Vdc
J1-b (+) ToJ1-C
OFF
OFF
0 Vdc
J1-b (+) ToJl-C
ON
OFF
+26 To +30 Vdc
J1-b (+) ToJl-C
OFF
ON
+26 To +30 Vdc
J1-b (+) ToJl-C
ON
ON
+26 To +30 Vdc
(14) Set the CCDA CLUTCH and CCDA BRAKE switch to OFF,
(15) Disconnect the multimeter.
b. Test feedback monitor circuits as follows:
(1) Set the METER SOURCE switch to ACTUATOR DRIVE.
(2) Connect variable dc power supply to pins listed below. Connect the digital multimeter across
the power supply. Set the FEEDBACK MONITOR switch to the position listed. The dmm shall indi-
cate the voltage listed.
APPLIED TEST VOLTAGE
FEEDBACK MON.
DMM (VDC)
+10VDC
COMMON
SWITCH
READING
J3-w
J3-C
DASH
+9.0 To +11.0
J3-x
J3-C
LCT
+9.0 To +11.0
J3-g
J3-C
LCT
+9.0 To +11.0
J3-F
J3-C
LCT
+9.0 To +11.0
(3) Disconnect external dc power supply.
(4) Set the FEEDBACK MONITOR switch to CCDA.
(5) Connect an ac power supply to receptacle pins J3-e (line) and J3-f. Connect the digital mul-
timeter, set to measure ac volts, across the power supply.
(6) Adjust power supply for 10 volts ac on the digital multimeter. The dmm shall read +9.0 to
+11.0.
(7) Disconnect the ac power supply.
4-26 Change 2
