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 TM 55-1905-219-14-11
5-152. LOUDHAILER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
TESTS (Cont)
Table 3. Public Address Set Type AN/PIC-2, Troubleshooting -
Voltage Measurements.
From
Test
Component
Normal Indication
Point
Symbol
No Signal
D.C. Volts Full Signal
B
ACROSS R1
0
0
B
ACROSS R3
+ 0.2
+ 0.2
B
ACROSS R4
+ 0.08
+ 0.08
A
ACROSS R2
- 12
- 11.5
A
ACROSS R5
- 0.45
- 0.45
A
ACROSS R6
- 0.35-
- 0.35
A
To T1-1
- 0.25-
-0.25
A
To T1-4
- 0.45
- 0.45
A
To T2-3
- 0.1
+ 0.15
A
To T2-5
- 0.1
+ 0.15
B
To L1-1
Below 0.05
+ 0.3
B
To L1-3
Below 0.05
+ 0.3
Conditions of Test
Meter: Any standard 20,000 ohm/volt V.O.M.
Test Point A - Positive bus
Test Point B - Negative bus
Transistors in circuit
Test set-up see illustration below
All readings are in volts
5-1512
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