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Page Title: Figure 2-29. Removal of MODE SELECT switch or panel illumination control.
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TM 5-6675-250-34
Table 2-1. Troubleshooting-- Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TS 006268
Figure 2-29. Removal of MODE SELECT switch or panel illumination control.
(8). Remove the attaching parts securing switch or control to the panel assembly and remove switch.
(9). Install new switch or control in panel assembly and secure with attaching parts. Connect and
solder electrical leads to switch in accordance with the identificaiton tags on the electrical leads.
CAUTION
To avoid damaging the electrical connectors, alternate tightening each of the two screws during assembly.
(10). Install printed circuit board, but do not tighten mounting screws. Connset the two electrical
connectors and secure by tightening two screws. Fasten ten screws that secure printed circuit
board to mounting brackets.
(11). Place edge-lighted panel over connector, seat properly and secure with five mounting screws.
(12). Install BIAS control locking knob and BIAS knob on switch shaft. Secure BIAS knob by
tightening setscrews.
(13). Install TEST SELECT knob on shaft with pointer at source voltage position. Install MODE
SELECT knob on shaft with pointer at GC position. Secure each knob by tightening setscrews.
(14). Install electronic control panel assembly in case and secure with light captive screws.
Step 2. Check for defective edge-lighted panel.
Replace the edge-lighted panel as follows: (fig. 2-30).
a. Place MODE SELECT switch to GC position.
b. Place TEST SELECT switch to SOURCE VOLTAGE position.
2-22

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