OVERHAUL-TEST (Cont) - TM-55-1905-220-14-110430

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OVERHAUL-TEST (Cont)

TM-55-1905-220-14-11 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

OVERHAUL-TEST (Cont)

TM 55-1905-220-14-11

5-117. SHIP'S COURSE INDICATOR - MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

OVERHAUL-TEST (Cont)

D.C. VOLTAGES IN 400-CPS AMPLIFIER.

Normal

Possible Trouble If Voltage

Terminals

Voltage (DC)

Is Not Normal

A1, 9-5

18.5

Measured voltage should be within 10% of

tabulated value; terminal A1-9 is posi-

tive. Check for 33.5 VAC on T2, 3-5.

If not correct, T2 is defective. If A1,

9-5 voltage is very low, CR1 or CR2 is

open. If heavy 400 cps ripple CR1 or

CR2 shorted.

A1, 9-2

If voltage differs from the voltage Al,

9-4, check transistor 01, resistor R3,

and capacitor C1. If voltages across

both halves of the transistor stage are

substantially the same, check common

components R2 and R5.

A1, 9-4

See above; check Q2, R4 and C2.

5-1338