Operating instructions
(4)
(1)
esmcl
Band
2
3
at
pin
4
of V3. Voltage
should
be
-4
volts dc.
Check R8,
C20, 51, and
C50.
A
winding
of T4 may
be open,
shorted,
or
misalined.
Check the
rvinding,
the
capacitor
across the u'inding,
the
220K-ohm
resistor,
ancl the
820-ppf
capacitor
in
the
assembly.
(3)
Repeat
(1)
above
for
all
bands.
The
table below indicates
the
frequencies
to be checked
and the circuit
compo-
nents for
each banci.
Tune
the
re-
ceiver to the signal
generator
fre-
quency.
_l
r requency
I
Components
c. Tennínal6
of
l'2
(Grtd
of Secondr-f
Amp-
lí.fi,er).
Set up
the eqr-ripment
as
described
in
o
above.
(1)
If no
signal is
hearcl,
check
tube
V2
and
screen
and
plate
voltages.
Check
resistors
R5
ancì
RG
and
capacitors
C13 and
C14.
(2)
The
grid
circuit
of V2 ma1'
be mis-
alined,
shorted,
or
open.
Check
resis-
tor R4
and
capacitors
Cg,
ClO,
C11,
and
C1B.
Check the
band ss'itch,
the
C
winding
of T2,
and
the internai
capa.citor.
(3)
Repeat
(2)
above
for
any inoperative
band, using frequencies
designated
in
converter
stages. This
will
check
the
following
components:
2.7 mc
5mc
4
9.5 mc
Cl1,
D
winding of T3,
internal capaci-
tor, and band
switcÌ..
I
C16, C winding of T7, internal capaci-
tor, and
band slvitch.
C15,
D
winding of
T7, internal capaci-
I
tor, and
band switch.
I
2 Band
srvitch, D
winding
of T2,
internal
capacitor,
and
C8.
Band
switch,
D
winding of
T6. internal
capacitor,
and u'i.
Band
switch,
E
winding
of T6,
internal
capacitor,
and
C6.
d.
Terminal
Z of Vt
(Plate
of First
r-f Amp-
lifrer).
(1)
If no
signal
is heard,
check
the
second-
ary
winding
of transformer
T2 for
misalinement.
Check
the
primary
and
secondary
windings
for
opens
or
shorts.
(2)
Repeat
the
procedure
for
any inopera-
tive
band
using frequencies
designated
in o(3)
above. This
u'ill
check
T2
and
T6.
e. Terminal
6 of V1
(Gríd
of Fír.st
r-f Amp-
Iifi.er).
If no
signal
is heard,
check
tube
V1
and
screen
and
plate
voltages.
Check
resistors
R2
and
R3
and capacitors
C4 and
C5.
Grid circuit
of.
Y2 may
be misalined,
shorted,
or open.
Check resistor
R1,
capacitors
C3, ClA, and
C2
(ANT.
TRIMMER),
band
switch,
ancì
seconcì-
ary of B winding
of transformer
T1.
Band
i
Components
Repeat
(2)
above for
all bands. The
table belou' indicates
the frequencies
to
be
checked and
the circuit
compo-
nents for
each band. Tune
the
re-
ceiver
to the signal
generator
fre-
quency.
Band Frstuency
Components
2.7 mc
C51,
B
winding of 14,
capacitor across
winding, 220K-ohm resistor
and
1,200-
ppf
capacitor
in
transformer
as-
sembly, and band switch.
C52,
A winding of T8,
capacitor across
winding, 220K-ohm resistor
and
2,200-ppf
capacitor in
transformer
assembly,
and band switch.
C53,
E
winding of T8,
capacitor across
winding,
150K-ohm
resistor and 1,800.
ppf
capacitor
in transformer,
and
band
switch.
5mc
b. Terminal
2 of V2
(Plate
of
Second
r-f
Amphrter).
Set the
receiver
controls
to the
same
settings as
used for
the converter
stage.
Perform
signal substitution
in
the same
manner
rìs for
the converter stage.
If no
signal is
heard,
check
the
primary
of T3
or T7.
To
check
all
bands,
use frequencies
designated
in a(4)
above.
AGO 3134
(2)
67