TM 11-6625-441-24
Table 3-I. Troubleshooting of Test Set, Radio T'S-1588/AZC-Continuad.
Malfunction
Probable cause
Corrective action
3. SELF TEST lamp DS2 fails to go
Defective lamp DS2.
Replace lamp DS2.
on and OPERATE lamp DS 1
Defective lampholder XDS2.
Replace lampholder XDS2 (fig. 3.1).
goes out when test cable plug PI
Defective wiring.
Repair or replace defective wiring,
is plugged into SELF TEST
RECEPTACLE J8.
Defective lamp DS3,
4. KEY ON lamp DS3 fails to go on
Replace lamp DS3.
when KEYING switch S 1 is held
Defective lampholder XDS3.
Replace Iampholder XDS3.
at either INTER or RADIO,
Defective KEYING switch S1.
Replace switch S1.
RECEIVER SEL switch S4 set to
Defective TRANSMITTER SEL
Replace switch S5 (fig. 3-2).
OFF, TRANSMITTER SEL
switch S5,
Repair or replace defective wiring.
Defective wiring,
switch S5 set to 1, both INPUT
SEL switch S3 and OUTPUT
SEL switch S2 set to R.
5. KEY ON lamp DS3 fails to go on
Replace lamp DS3.
Defective lamp DS3.
when TRANSMITTER SEL
Defective lampholder XDS3.
Replace lampholder XDS3 (fig. 3-1).
switch S5 is set, in turn, to 2, 3,
Defective TRANSMITTER SEL
Replace switch S5 (fig. 3-2).
and 4, with remaining switches
switch S5.
set as in step 4 above.
Replace switch S1 (fig. 3-1).
Defective KEYING switch S1.
Repair or replace defective wiring.
Defective wiring.
6. KEY ON lamp DS3 fails to go on
Replace lamp DS3.
Defective lamp DS3.
when SIGNAL switch S6 is held
Replace lampholder XDS3.
Defective lampholder XDS3.
at HD MIC, TRANSMITTER
Replace switch S6.
Defective SIGNAL switch S6.
Replace switch S5 (fig. 3-2).
SEL switch S5 set to 4,
Defective TRANSMITTER SEL
RECEIVER SEL switch S4 set CO
switch S5.
OFF, and both INPUT SEL
Defective OUTPUT SEL switch S2.
Replace switch S2 (fig. 3-1).
switch S3 and OUTPUT SEL
Defective wiring.
Repair or replace defective wiring.
switch S2 set to R.
7. KEY ON lamp DS3 fails to go on
Replace lamp D.S3.
Defective lamp DS3.
Defective lampholder XDS3.
when SIGNAL switch S6 is held
Replace lampholder XDS3.
Defective OUTPUT SEL switch S2.
Replace switch S2.
at HD MIC, OUTPUT SEL
Defective SIGNAL switch S6.
Replace switch S6.
switch S2 is set to I, and
Defective TRANSMITTER SEL
Replace switch S5 (fig. 3-2).
remaining switches set as in step
switch S5.
6, above.
Repair or replace defective wiring.
Defective wiring.
8. KEY ON lamp DS3 fails to go on
Replace lamp DS3 (fig. 3-1 ).
Defective lamp DS3.
Replace lampholder XDS3.
when SIGNAL switch S6 is held
Defective lampholder XDS3.
Replace switch S6.
at HD MIC OUTPUT SEL,
Defective SIGNAL switch S6.
Replace switch S5 (fig. 3-2).
Defective TRANSMITTER SEL
switch S2 set at T, and
TRANSMITTER SEL switch S5
switch S5.
Replace switch S2 (fig. 3-1).
Defective OUTPUT SEL switch S2.
set, in turn, 3, 2, and 1.
Repair or replace defective wiring.
Defective wiring.
9. KEY ON lamp DS3 fails to go on
Replace lamp DS3.
Defective lamp DS3,
Replace lampholder XDS3.
when TRANSMITTER SEL
Defective lampholder XDS3.
Replace switch S5 (fig. 3-2).
switch S5 is set to 1 and
Defective TRANSMITTER SEL
RECEIVER SEL switch S4 is
switch S5.
rotated from 1 through INTER,
Defective RECEIVER SEL switch
Replace switch S4.
S4.
Defective wiring.
Repair or replace defective wiring.
10. KEY ON lamp DS3 fails to go on
Defective lamp DS3.
Replace lamp DS3.
when INPUT SEL switch S3 is
Replace lampholder XDS3 (fig. 3-1).
Defective lampholder XDS3.
set to I, TRANSMITTER SEL
Replace switch S5 (fig. 3-2).
Defective TRANSMITTER SEL
switch S5 set to 1, OUTPUT SEL
switch S5.
switch set to R, and RECEIVER
Defective INPUT SEL switch S3.
Replace switch S3 (fig. 3-1).
SEL switch S4 set to OFF.
Repair or replace defective wiring.
Defective wiring.
11. KEY ON lamp DS3 goes on when
Replace switch S3.
Defective INPUT SEL switch S3.
INPUT SEL switch S3 is set to T
Repair or replace defective wiring.
Defective wiring.
with remaining switches set as in
step 10 above,
12. SELF TEST lamp DS2 fails to go
Defective self-test relay K1.
Replace relay K1.
out and OPERATE lamp DS1
Defective wiring.
Repair or replace defective wiring.
fails to go on when test cable
plug P1 is disconnected from
SELF TEST RECEPTACLE J8.
3-3
