TM 55-1520-240-23-7
8-73
TEST TRANSMISSION OIL TEMPERATURE SELECTOR SWITCH OR INDICATOR
(AVIM)
(Continued)
8-73
DIAL LAMP TEST
8.
Connect selector switch (2) to SCAN to test
setup.
9.
Connect indicator (5) to test setup.
10.
Set test switches 6, 7, 8, 9, and 10 to NORMAL.
11.
Set decades (11, 12, 13, 14, and 15) to 0 ohm.
12.
Apply power to test set up. Selector switch (2)
SCAN position dial lamp shall come on.
13.
Set and hold selector switch knob (3) to TEST.
Check TEST dial lamp. Lamp shall come on.
Release selector switch. Switch knob (3) shall
return to SCAN.
14.
Set selector switch knob (3) to each dial position,
FWD, AFT, MIX, LEFT, AND RT. Check dial lamp
for each position. Lamp shall come on at each
position.
TRANSDUCER CIRCUIT TEST
15.
Set selector switch knob (3) to SCAN.
NOTE
SCAN dial lamp remains on when
selector switch is at SCAN.
16.
Adjust FWD decade (11), AFT decade (12), MIX
decade (13), LEFT decade (14), and RIGHT
decade (15) to 1500 ohms.
17.
Adjust FWD decade (11) to 500 ohms.
18.
Check selector switch (2). FWD dial lamp shall
come on as decade (11) is adjusted.
19.
Check indicator (5). Indicator shall read below
-60ºC.
20.
Adjust FWD decade (11) to 1500 ohms.
21.
Repeat steps 17 thru 20 at AFT decade (12),
MIX decade (13), LEFT decade (14), and RIGHT
decade (15). Then go to step 26.
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