Technics ST-9030 - Page 12

o8
FM SIGNAL
GENARA
ADJUSTMENT
PO
I
NTS
REM,ARKS
.,,..
FRE,
)UENCY
DIA.L
SETTI N G
INDICATOR
CONNECTION
(VTVM,
SCOPE
and
DISTORTION
METER)
CONNECiION
M
UTING
LEVEL ALIGNMENT
Connect
AC.VTVM
to
output terminal.
V R4O1
.
Servo
iuning
swiich to
"auto"
¡
Adjust
so
that
ou tput
can be
cbiained.
100
(
10(
w¡ll'
,1Hz
'/o
Mod.
400H2)
1 00MHz
Connect
signal
genera-
tór
to
coãxial
antenna
lerminal
through
FM
durnmy
antenna
Apply
16dB
(6.3¡V)
to set.
SIGNAL
METÊR
ALIGNMENI
VRsO1
Adjust
io ôbout
"4.
7"
on siganl meîer
scale.
10c
(30
witl
dHz
; Mod.
400H2)
'100MHz
S¡gnal
meter of
set
.:.:..
Connect
s¡gnal
genera-
tor to
coaxial
ôntenna
termiñal
through
FM
dummv
antenna
Apply
IOOdB {1OomV}
to set.
FM
MPX
CIRCUIT ALIGNMENT
lator
section
.
OQì=14.
:
.
-:"
t'"':
.100%
. ll
j
n
ì
L or R
{separation
adjustment)
:
FM
signal
generator
.ì
l'.
Sisnal
generated
.......;
IOOMHz
'
2. lnp,ut to the
sÞt .
60dB
'The
set is
luned
to
100MHz
.
M signal
generaior
to
90% modulation,
with
"L +
R"
and
MOD
to
"1OO%.
.oN
.
-
Preliminarily
PILOT
set to
1.,,Modulating
freouencY...
2.
MODULATION...,.,.
3.
OUTPUTMODE.;....
4.
PILOT
signal
.
,.
.
.;'
.
5. MPX OUT...
at stèleo
ADJUSTING
PROCEDURES
ì
PLA.CES
GNAL
\TOR
STEREO
MODULATOR
PORTIONS TO BE
ADJUSTE D-
FOR
FM
GEN
clRculr
fo
3E
ADJUSTEC
vR6Ò2
(19
kHz
oscillaìion)
1. Connect the
frequency
counîer
ro TP6OI thròugh
100kO.
2. Adtust
VR602 to oblaín
lgkHz
+30H2
Connect
to ¿
terminal
of t
through
dun
anten
n a
ì
ten
na
re set
Tìy
\on-modulatior
Vonaural
signal
(Pìlot
OFF)
Voltage Con'
t.rolled
Osc¡l'
latór
(l9kHz
Oscillation)
(Level
alígnment)
vR702
1.
Connecr
AC electronic
vollmeîer to
"REC
OUT"
lerminal
of
the
set.
2. Adjust in such a
manner that
tion of the antenna
input and
is
subjécÌed to
R
modulation
L outþut
at
the tirne
of
L
modula-
B ourput
at
the time
when
input
are
in
the same
level.
I
Connect
to aþtenna
term;nal
of the
set
through
dumrny
antenna
I
L and
R
stereo
signal.
(Pilot
ON)
ween
L and
R
Pilor
bandpass
f¡ lÌer
Leùel align--
menr bei-
Pilot cancel
Connect oscíllosbope
or AC electronic
voitmeter to TP602.:i
2. Repeat adjustments
oí
VR60l ¿nd
L601 to
bring rhe
output
(19
kHz) to
m¡nirnum:
Non-modulãt¡or
Stereo
signal
{Only
pilot
ON)
VR60l
(pìlot
cancel )
L601
(pilot
cancel
)
Connect
to
antenna
term¡nal
of tþe
set
through
dummY
antenna
1.
Connect
distortion
factor
gauge
lo
"REC
OUT"
terminal
of.lhe
2.
Make
adiustment
sÕ that
distortion of L channel
outpui
becomes
rnlftmum
I îen na
e set
L and
R stereo
signal
L602:
(pilot
Bandpass
f¡
I ter)
.Connect tó a
ter¡m¡nal
of 1l
through
dum
antenna
'1.
Connect AC elecironic
voltmelgr to
"OUTPUT"
terminel
of
the
2. Make
adjustment
to
brìng thg ouiput
to
.ninimum.
setl'Jon-modulalìor
Stereo
signal
cr701
(Subcarrier
cancel)
Connecl
tó
ahtenna
terminal
of the
set
through
dumhy
antenna
i
VRTOi
(Wide
separation)
1.
Connect AC êlectronic
vollmeter
to
"OUTPUT"
terminal
of the
set.
2. Make
adjustments
so Ìhat,
when the ¿ntenna
input
is subiected
.
to Lmoàulat¡on {or
R
modulation},
R
channel
outpul
(or
L
channel output)
becomes
minirnum-
the
Connect
to
ierminal
of
through
du
antenna
LorR
Stereo
signal
11
k{z
3oo/o
modulation)
Wíde
separation
1.
Shori-circuìt
TP302
and
TP303 ìo
form narrow
circuìt'
2. nC¡ust
VR703 in the
similar
order as
in
20
(w¡de
seperat¡on)
3.
Afier complet¡on
of adiustments,
release TP302
and
TP303
{rom the short-circuìted
state-
Lor
R
Stereo
signai
(1
kïz 3Oo/o
mcCulation)
VR703
(Narrow
se.oaration )
Narrow
separation
a
ihe
Connect
to
terminal
of
through
du
aäîenna
Connect
AC
electronic
voltmeîer to
"OU
set.
Z, Ae+o¡e edjustments,
kêep
VR5O2
fully turned
coúnterc¡ockwíse'
3.
Measure the outbutdifference
(separation)
between
R chánnel
output and
L channel
output
at
the
ìime
when
êntenna
input
is
subjected
to L
modulation.
4. Meásure the
output
dìfference
between
L and
R
as
in
the
previous
item,
wiih
h¡gh-blend
wilch
set
to
"auto", and adÌust
.
VnSOZ
!o
oblain
the iame
output
difíerence
(seoaration)
as
measur?!d
in
the
Previous
¡lem.
I
TPUT"
Ìerm¡na!
of
the
LorB
Siereo
si-onal
11
k9z 3jo/o
modulation)'
VR5O2
(Auto
high-blend)
Auto
h¡gh-
blend
Auto lF
selectcr
Connecl
to a
términal
of the
sel
thrcugh
dÙmmY
ânlenna.
AC.¡usl
the
input
set
to
31
dB
I
I
ntenna
I
t'o
the
i
T3O1
(3OOkHz)
T302
(200kHz)
Connerjt io art"tenna
terminul of tnb sei
tiirouglr
dumrlry-
!
antennl.
I
i
Adiust
rthe
in(ut
to
the
set
ito 60 dB.
I
ñon-modu
latior
Vonaural
signal
14
13
15
'
:r': '
'â^2
18
19
20
21
\4
in.
<J
r
7St
UX
rN-+r
To s.G.
(imp
75O)
E
ALIG${
O
FRONT
BUFJ
E
,.
Trimmer
i:l
.
;.i:
::
a..!
..
ij-;:
.:..
t:
:¡,.
r
it':|.
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'
i:'.:'
iiti:
BUFF
ftimmer
n
c
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