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v
-
il/iI'tTIPLEXE
TROUBLE S}ICOTING
AND
HEPAIRS
SY]VTPTCIVIS
,i
i
PIICBABLE
CAUSE
i
'TNPAIRS
NECESSARY
t:
__i*_-_*-'_*r
i,
I I
-D-ir^+
o-^"1 if-.+--
^-;-.^,.i+
lr
D^o,1
.
1
l-, Pilot
arnptifying
circui-t
I
t
"
lleaCjustnient
(Af geOe:
Poor separation
Excessive
d.istortion
in
stereo reception
Distortion
prevalent
at
points
of
high
i
I
J
I
I
(Arlft in
separation
control; d-rift tn
18 kc
coil1'
oa'
othet'
faulty
I
" Pilot amplifier circrrit
2,
Composite
circuit
(5csZ, etc.
)
1.
Drop
in line
pol4rer
voltage
"
1.
fnadequate
pil-ot
level-
"
?-
"
Drop
in line
power
vol-tage.
A'IIBIC )
;
replacenent
of
com-
separation control;
read.justnent of
conponents
"
1-
Re
ad-
j us
tment or
replacement of
components
"
2. Vicinity of
6Ce7
1.
Provid-e
supply of
proper voltage.
ileaCjustment
;
replace*
ment
of faulty
conponents
"
Check
power supply
section.
I
"
Replace
6CC7
or
other
faul-ty
components
in
vicinity of
6CG7
"
(c.ritt in
L9
kc
t::ans-
forrner
t cr
other
faulty
components)
"
I
ponents.
I
----i-**
2.
Composite
c
i-rcu
j-t
! 2
"
Read
jus
tment of
l"
Extreme d-rop
in
volume
in
stereo
recepti-on
l-
"
Composite
amplifying
ci-rcuit
(Faulty
6cc7
or
con-
ponents
in its viainity"
)
Faulty
separation
control variable resis-
tor
(burntout
)
Severed- 18
kc coil"
6CCT
"
25OOpf cathod-e
capacitor
faulty.
Faulty
)B
kc
fil-ter
(
one channel only)
,
2.
One
of
second-ary wind-
ings
of
18
kc
transformer
severed..
tr'arilty
neon tube.
l.
Separati-on
completely
(n
o
change
separati-on
ad-justed-.
)
control-
ineffective
even
rrrhen
control
Replace
lleplace
Replace
c
omponent
"
component
"
coriponents.
1"
Replace
component.
Replace
component.
Poor separation
on
one channel only
I
_--_i-_
Stereo ind-icator falls
to function
L
a)
1o
Replace
component.
ilead-just ind-icator
sensitivity control
2, Inproper
worki-ng
point
"
+Other malfwr.ctions should be
d.ealt with in the
sane way
as
f
or other arnplifies.
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