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Page Title:
T-1054(P)/GRC-144(V) and T-1054 (P)A/GRC-144(V) Troubleshooting Chart-continued |
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|  TM 11-5820-695-35
Item No.
Symptom
Probable trouble
Corrective action
c. Defective wiring primary power
c. Use the -1064/GRC-144 inter-
distribution circuits.
connecting diagram (fig. 5-15)
and T8562 B/U to check con-
tinuity of wiring between vane
axial fan 1A1B1 and POWER
ON/OFF switch 1A15A883.
7 Any indicator lamp on power
a. Power Supply, chassis assembly
a. Check power supply chassis asem-
supply 1A1 not lighted.
1A1A13 defective.
bly 1A1A13 by substitution
(para 8-22). If indicator lights
after 1A1A18 is replaced, use
the power supply chassis assem-
bly 1A1A18 checks (para 89)
to isolate the trouble.
b. Defective component or wire in dc
b. Perform the T-1054/GRC-144 de
power distribution circuits.
Power distribution checks (para
c. Defective component or wire in
c. Perform the T-1054/GRC-144
primary power distribution
primary power distribution
circuits
checks (para 87c, sections 1
through 5).
8 Out of color band meter in-
Same as item No. 7 in this chart---------------Perform the corrective action given
dication obtained at any of
for Item No. 7 in this chart.
the component test points
(TM 11-5820-695-12).
9 Zero meter indication oh-
a. Defective wiring on meter panel
a. Use the T-1054/GRC-144 inter-
tained when meter selec-
assy 1A15A8
connecting diagram (fig. 5-15)
tor switch is placed in any
tad T8-52 B/U to check wiring
position.
bet-, meter selector switch
1A15A8S4 and meter 1A15A8M1.
b. Meter 1A15ASM1 defective ----------------- -b.
Use the transmitter meter
1A1A8M1 calibration proce-
due (para 6) to cheek meter
1A16A8M1.
c. Meter selector switch lA15ASS4
c.
Replace meter selector switch
defective.
1A16A8S4 (fig. 84).
10 Orderwire channel inopera-
a. Defective wiring in electrical
a.
Perform the electrical equipment
tive (cannot originate a
equipment cabinet 1A15.
cabinet 1A15 checks (para
orderwire call).
3-11c, sections 6 and 7).
b. Orderwire chassis 1A18A7
b.
Replace orderwire chassis 1A18A7
defective
(para -20).
11 1600 Hz ring signal not
a. Defective wiring in electrical
c.
Perform the electrical equipment
generated when RING
equipment cabinet A.
cabinet 1A5 checks (paras
pushbutton is depressed
3-11, section 7 (steps ad
through ag)).
b. RING pushbutton switch
b.
Check RING pushbutton switch
1A16A8S1 defective
1A15A8S1 by substitution
(fig. 84).
c. Orderwire chassis 1A13A7
c.
Replace orderwire chassis 1A18A7
defective.
12 Audible alarm signal cannot
a. Defective wiring in electrical
b.
Perform the electrical equipment
be silenced by depressing
equipment cabinet 1A1.
cabinet 1A16 checks (para
the RESET pushbutton.
3-11c, section 1 (step x) and
section 7 (step I and m)).
b. Orderwire chassis 1A18A7
b.
Replace orderwire chassis 1A18A7
defective
13 Any indicator lamp on digital
a. Defective wiring in electrical
a.
Perform the electrical equipment
data modem 1A12 not
equipment cabinet lA15.
cabinet 1A15 checks (para
lighted.
3-11c sections 4 and 5).
b. Digital data modem chassis
b.
Replace digital data modem chassis
1A12AI2 defective.
1A12A12 (para 8-29).
3-5
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