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Page Title:
R-1467(P)/GRC-144(V) and R-1467(P)A/-GRC-144(V) Troubleshooting Chart-continued |
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|  TM 11-5820-695-35
Item No.
Symptom
Probable trouble
Corrective actions
4 TDA OVEN indicator does
a.
Defective wiring
a.
Check for continuity between: pin
not cycle on and off.
2 of 2A15A2XDS1 (fig. 5-21)
and pin C of connector
2A165W2P; and pin 1 of
2A15A2XDS1 and pin D of
connector 2A15W2P2 Also
check resistance between pin 9
of 2A15A2XIS1 and terminal
2 of POWER 5 AMP SLO-BLO
fuse 2A165A2F1. Resistance
should be 2200 20 ohms.
b.
Indicator assembly 2A15A2XDS1
b.
Replace indicator assembly
defective.
2A165A2XDS1 (fig. 3-19).
5
SYNTH OVEN indicator
a.
Defective wiring
a.
Check for continuity between: pin
not lighted
2 of 2ALSA2XDSL1 (fig. 5-21)
and pin 1 of connector
2A15W2XA14; pin 1 of
2A15A2XD610 and pin G of
2A15A2XDS6; and pin 3 of
2A15A2XDS10 and the E2 CAB
GRD lug on top of 2A15.
b.
Indicator assembly 2A15A2XDS10
b.
Replace indicator assembly
defective.
2A15A2XDS10 (fig. 3-19).
c.
Electrical equipment chassis
c.
Replace electrical equipm nt
e
2A14A10 defective
chassis 12A14A10 (para 3-49).
6
5V and 28V indicators on
a.
Defective wiring
a.
Remove electrical frequency syn-
electrical frequency syn-
thesizer 2A14 (para 849) and
thesizer 2A14 not lighted.
check for continuity between
pins 5 and 6 of connector
2A15W2XA14 (fig. 21).
b.
Electrical equipment chassis
b.
Replace electrical equipment
2A14A10 defective.
chassis 2A14A10 (para 3-49).
7
Any fault indicator on elec-
c.
Electrical equipment chassis 2A14A1
0
Replace electrical equipment chassis
trical frequency synthesizer
defective.
2A14A10 (par 3-49).
2A14 lighted.
8
Power on and vane axial
a.
Vane axial fan 2A15B1 defective
a.
Remove vane axial fan 2A15B1
fan 2A15B1 not operating.
(para 341) and use the TS-
352 B/U to check its resistance
as follows: T1 to T4 should be
600 t 100 ohms, and T1 to T6
should be 800 100 ohms.
b.
Capacitor 2A15C1 defective
b.
Check capacitor 2A15C1 para
3-42) by substitution
c.
Defective wiring in primay power
r
c.
Use the R-147/GRC-144 Inter-
distribution circuits.
connecting diagram (fig. -21)
5
and TS-42 B/U to check wiring
between vane axial fan 2A15B1
and POWER ON/OFF switch
2A15A2S2
9
Any indicator lamp on power
a.
Power supply chassis assembly
a.
Check power supply chassis
supply 2A1 not lighted.
2A1A5 defective.
assembly 2A1A5 by substitution
after 2A1A5 is replaced, use the
power supply chassis assembly
2A1A5 checks (para 3-15 , sec-
c
tions 1 through 4) to isolate the
trouble.
b.
Defective component or wire in
b.
Perform the R-1467/GRC-144 de
dc power distribution circuits.
power distribution checks (para-
3-14c, sections 1 through 4).
c.
Defective component or wire in
c.
Perform the R14617/GRC-144
primary power distribution
primary power distribution
circuits.
checks (para 3-13c, sections 1
through 5).
3-20
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