Quantcast Figure 2-35. Removal of ECU panel assembly.

 

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Figure 2-34. Gyroscopic reference unit power cable.
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TM-5-6675-250-34 Survey Instrument Azimuth Gyro Lightweight( Leaser Siegler Inc. Models AG-8 and AG-8A) Manual
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Figure 2-36. Removal of ECU panel assembly.
TM 5-6675-250-34
Table 2-1. Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TS 006274
Figure 2-35. Removal of ECU panel assembly.
b. Unfasten ten screws securing the printed circuit board to the mounting brackets and loosen the board
to obtain access to electrical connectors.
CAUTION
To avoid damage to the electrical connectors, alternately back-off each of the two attaching screws when removing the
connectors.
c. Disconnect two electrical connectors (2A2J5 and 2A2J6) by unfastening two screws at each connector.
d. Inspect printed circuit board for visual evidence of cracked circuits, corrosion, burns, or other
evidence of defects.
Replace a bad printed circuit board.
CAUTION
To avoid damaging the electrical connectors, alternate tightening each of the two screws during assembly.
(1). Install a good printed circuit board, but do not tighten mounting screws. Connect the two
electrical connectors and two electrical connectors and secure by tightening two screws. Fasten
ten screws that secure printed circuit board to mounting brackets.
(2). Install electronic control panel assembly in case and secure with eight captive screws.
Step 4. Check for defective PRESS TO TEST switch (2A1S2, MODE SELECT switch (2A1S3), or TEST SELECT switch
(2A1S1).
a. Loosen the eight captive screws and lift the electronic control panel assembly from the case (fig. 2-36).
2-28, Change 1

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