Transmitter, Radio T-1054(P)/GRC-144(V) and T-1054(P)A/GRC-144(V) Troubleshooting Chart

TM 11-5820-695-35

a. Use of the Chart. The T-1054(P)/ GRC-144(V)

dures will isolate the fault to a replaceable component,

wire or piece part. If not, the localization procedure will

and T-1054(P)A/GRC-144(V) troubleshooting chart (b

reference the isolation procedure to be used.

below) supplements the operational checks and

corrective measures contained in TM 11-5820-695-12 If

the operational checks and corrective measures in TM

d. Isolation.

When use of the localization

11-5820695-12 fail to correct the trouble or indicates

procedures fails to isolate the fault to a replaceable

that higher category maintenance is required, apply the

component, wire, or piece part; continuity and resistance

corrective action in the chart below. To use the chart,

checks must be made to isolate the fault. The trouble

read down the Symptom column of the troubleshooting

isolation checks (para 3-7 through 3-11 and 3-13

chart until the abnormal symptom or condition is found.

through 3-17 and 3-18.2 through 3-18.4) provide point-

Perform the corrective actions indicated in the chart

to-point continuity and resistence checks to isolate

until the abnormal symptom or condition is corrected.

defective wiring or circuit elements within Transmitter,

Figures 3-1 through 3-16 are parts location diagrams

Radio T-1054(P)/ GRC-144(), T-1054(P)A/GRC-144(V),

which will aid the maintenance man in locating parts.

Receiver

Radio

R-1467(P)/GRC-144V),

R-

1467(P)A/GRC-144 (V) and Converter-Multiplier CV-

3633/GRC144(V). The trouble isolation checks are

b. T-1054(P)/GRC-144(V) and T-1054 (P)A/GRC-

referenced in the troubleshooting charts (para 3-6b, 2-

144(V) Troubleshooting Chart.

12b and 3-18.lb) and specify those sections of the-

trouble isolation checks that must be performed. A

NOTE

resistance and capacitor color code diagram (fig. 5-1) is

Unless otherwise specified the

provided to aid maintenance personnel in determining

troubleshooting chart below pertains

the exact value, voltage rating, and tolerance of

to Transmitter, Radios T-1054(P)/ (C-

capacitors and resistors.

144(V) T-1054(P)A/GRC-144(V). Refer

to figure 5-15 for T-1054(P)/GRC-

3-6. Transmitter, Radio T-1054(P)/GRC-144(V) and

144(V) interconnection diagram and

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

refer to figure 5-15.1 for the T-

1054(P)A/

GRC-144(V)

WARNING

interconnection diagram. For Radio

115 vac is present in Transmitter,

Sets AN/GRC-144(V)3 and AN/GRC-

Radio T-1054(P)/GRC-144(V). Do not

144(V)4, when the probable trouble

remove or replace parts nor perform

or corrective action columns refer to

continuity or resistance checks while

digital data modem chassis 1A12

primary power is applied to AN/GRC-

(para 3-29) substitute digital data

144(V) Radio Sets.

combiner 1A12 chassis (para 3-29.1).

Item No.

Symptom

Probable trouble

Corrective action

5 AMP SLO-BLO fuse blows

a. Defective component or wire in

a. Remove power supply 1A1 (para

when replaced.

primary power distribution

3-22a) and electrical frequency

circuits.

synthesizer 1A14 (para 331a)

from electrical equipment

cabinet 1A15. Insert replace-

ment fuse and then set POWER

ON/OFF switch on meter panel

assembly 1A15A8 to ON. If

replacement fuse blows, pro-

ceed to step d below. Other-

wise, proceed to steps b and

c below to isolate the fault.

Change 6 3-3