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 TM 55-1905-219-14-11
5-117. SHIP' COURSE INDICATOR - MAINTENANCE INSTRUCTION (Continued).
S
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-TEST- (Cont)
DC 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
18
If voltage differs from the voltage A1,
9-4, check transistor Q1, 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
18
See above; check Q2, R4 and C2.
5-1336
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