T-1054(P)/GRC-144(V) and T-1054 (P)A/GRC-144(V) Troubleshooting Chart-continued

TM 11-5820-695-35

Item No.

Symptom

Probable trouble

Corrective action

b. Defective component or wire in

b. Perform the power supply chassis

power supply chassis assembly

assembly 1A1A13 checks (para

1A1A13.

3-9c, sections 1 through 11).

c. Electrical equipment chassis

c. Replace electrical equipment

1A14A10 defective.

chassis 1A14A10 (para 3-31).

d. Defective wiring in primary pow-

d. Perform the T-1054/GRC-144

er distribution circuits.

primary power distribution

checks (par 8-7c, sections 2,

4, and 5).

e. Vane axial fan lA1SBi defective-------e. Remove vane axial fan 1A16B1

(para 3-28) and use the TE-

852 B/U to check its resistance

as follows: T1 to T4 should

be 500 100 ohms, and T1 to

T5 should ze 100 ohms,

f. Capacitor 1Ar6Cl defective--------------f. Check capacitor 1A1C51 (para

3-24) by substitution.

g. Power transformer 1A1SA10T1--------g. Check power transformer

defective.

1A16A10T (para 8) by

substitution.

2 All indicators on meter panel

a. 5 AMP SLO-BLO fuse 1A1SASF1-----a. Check 5 AMP SLO-BLO neon

assembly 1A16AS not

defective.

fuse indicator on meter panel

lighted.

assembly 1A16A8. If lighted,

refer 4o item No. 1 in this chart.

b. Same as item No. 7 in this chart -----b. Check indicators on power supply

1A.. If any indicator not lighted,

refer to item No. 7 in this chart

3 SYNTH OVEN indicator

a. Defective wiring---------------------------- a. Remove power from T-10S4/'GR-

not lighted.

144 (pare 3-Za) and check for

continuity between: pin 2 of

1A15A6XDS9 (fig. 5-15) and

pin 1 of connector 1A15W27-

XA14; pin 1 of 1A15ASXDS9

and pin G of 1A16A8XDS10;

and pin 8 of 1A16A8XDS9 and

the E1 CABINET GROUND

lug on top of T-1054/GRC-144.

b. Indicator assembly lAiSASXDS9

b. Replace indicator assembly

defective.

1A15A8XDS9 (fig. 3-4).

c. Electrical equipment chassis

c. Replace electrical equipment

1A11A10 defective.

chassis 1A14A10 (pare 3-31).

4 5V and 28V indicators on

a. Defective wiring---------------------------- a. Remove electrical frequency syn-

electrical frequency

thesizer 1A14 (para 3-31) and

synthesizer 1A14 not

check for continuity between

lighted.

pins 5 and 6 of connector

1A15W27XA14 (fig. 5-1,5).

b. Electrical equipment chassis

b. Replace electrical equipment

1A14A10 defective.

chassis 1A14A10 (para 3-31).

Any fault indicator lamp on

Electrical equipment chassis 1A14A10 Replace electrical equipment chassis

electrical frequency syn-

defective.

1A14A10 (para 341).

thesizer lA14 lighted.

6 Power on and vane axial fan

a. Vane axial fan11A1SB1 defective------a. Remove vane axial fan 1A16B1

1A1SB1 not operating.

(para 3-23) and use the TS-

352 B/U to check its resistance

as follows: T1 to T4 should be

500 100 ohms, and T1 to T5

should be 800 100 ohms.

b. Capacitor 1A15C1 defective------------b. Check capacitor 1A15C1 (para

3-24) by substitution.

3-4