Operating instructions
Stuge
glain
charts. These
charts
(par.
87) can be used to localize
obsclìre,
hard-to-find troubles,
Intermittents. In
all these
tests, the
possibility
of
intermittents
should
not
be overlooked. If
present,
this type of
trouble
may
be made to
appear by
tapping or
jarring
the
set.
It is
pos-
sible that the
trouble
is not
in the
radio itself, but in
the
installation,
or
the trouble
may be
caused by external
conditions. In this event, test
the
in-
stallation. if
nossible.
70.
Trouble-Shooting
Doto
Take advantage of the material supplied in
this
manual. It will help in the rapid ìocation
of faults.
Consult
the
follorving trouble-,shoot-
ing data:
a. Poroer SupttIU PP-308
/URR.
Fig. or
Par.
No.
Description
(6)
(7)
Frg. or
Par No.
Description
Fig.45
Fig.48
Pa'".74
P:rls.
80 thi'ough 8,1
Par. 86
Par.
87
IìaCio
Receiver
R-l74/URR,
tube
socliet voltage
ancl resistance
dia-
gl'atn.
Rarlio Receiver
R-174lURR,
sche.
nratic
rliaglam.
Inpr-rt rcsistance measurements
for
R:rtiio Receiver
R-174/URR.
Signal sr-rb.-"titution.
D-c le'sistances
of coils
and trans-
folurcls
of
Radio
Receiver R-
171./
URR.
Stage
gain
charts.
rl
II
I
fl
h
I
(
-t
t
(
t
I
J
I
tb
br
71. Tools
qnd
Test Equipment
Required
for Trouble
Shooting
The tools required for trouble
shooting Raclio
Receiving
Set
AN1GRR-5
are
listed
in
para-
graphs
30 and 31.
The
test equipment required
for trouble shooting
is
listed below. The
tech-
nical manuals associated with
the test equip-
also are
listed.
I
ól
rt
Test equipment
]
Instmction manual
Fig.35
Fig.36
tr'io 14
Fig.47
Par. 73
Par. 85
Porver
Supply
PP-308/URR, top
view of chassis, wibh
cover re-
moved.
Pou'er Supply
PP-308/URR,
bot-
tom view of chassis, rvith
cover
removed,
Power Supply PP-308/URR, tube
socket
voltage and resistance dia-
gTam.
Porver Supply PP-308/URR, sche-
matic
diagrain.
lnput lesistance measLlrements for
Pov'er
Supply
PP-308/URR.
D-c resistances of coils and
trans-
formers of
Power
Supply
PP-
308/URR,
RF Signal
Generator Set AN/
URM-25 or Signal Generator
TS-588/U,
or
equal.
Output Meter TS-585A/U or equal
Flequency Meter
Set SCR-211
Electronic
ÙIultirireter TS-505/U,
or eqr,ral.
Tube Tester I-177, I-177-4, or
equal.
Audio
Oscillator
TS-382.A'/U
.05-pf capacitor
.01-pf
capacitor
l-10-l
rrf
capacitor
NAVSHIPS
91283
Tl{ 11-5018
11-5017
1 1-300
11-5511
II-2627
16-35T5382-2
TM
TM
TM
TM
TO
Fig.37
I'iq.38
*.
39
h.
Rudio Receiaer R-17/'/URR.
Fig. or
Par. No.
Description
72.
Visuol
Inspection
When
a
radio set
is
brought
in from the field
for check or
repair, remove the
pou'er
suppl-v
and the
receiver from the
case, remove the
top
cover of the
receiver and bottom
covers of both
Lrnits, and inspect both
as
follows
:
a.
Examine
for burned
insulation and resis-
tors. Examine for
wax leakage
and any dis-
coloration
of apparatus
and r,vire.
b. Inspect for broken
connections to
tube
sockets,
plugs,
and
other apparatus, as
\ilell as
for defective
soldered
connections.
Examine
Radio Receiver
R-174/URR, resis-
tor-capacitor
board voltage and
resistance diagranl.
Radio
Receiver: R-l?4/URR,
top
vierv
of
chassis,
rvith cover
re-
moved.
Radio Receiver R-174/URR,
bot-
tom view of chassis,
rvith cover
removed.
56
AGO 3134