Technics ST-9030 - Alignment

4
ALIGNMENT
¡NSTRUCTIONS
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.. .Preparation of ¡nsttuments
and appliances
to be
used
I.;
AC/DC
VTVM
2.
.
Oscilloscope
3.
FM signal
generaior
4. Frequency
counter
5.
Dìstortion
meter
é.
rù
zSO dummy
antenna
(Refer
to
fig. 1
on
page
18)
i. Ortpri
oi
signaigenerator
should
be
no
higher
than
necessôry
lo
obta¡n
an
oulput
reading'
.
Condition
of
the
set
1.
Mpx hi-blend
sw¡1ôh...
2.
Seivo
tuning
Switch .
.
.
3.
lF
select
switch
4. Outputlevelcontrol,
. .
5.
When TP302 and
TP303 are
short-circuiled,
the
NARROW
lF
irrespectíve
of
the
I
F
swi
ich.
circuit
is
always
esiôblislìed
REMARKS
Adjust
for OmV
of
VTVM
indication
Point of
non'
inter-ference
Connecl
DC
VTVM bewveen
TP20l
and
chassis.
T102
[WIDE
IFTI
tAl
Poini
of
non-
inter-ference
Connect
DC
VTVM
between
TP101 and
chassis.
FM
SIGNAL
GÊNERATOR
CONNECTION
EOU
No-signal
Nó-signal
IF
AND
RF
ALIGNMENT
(NARROW
IFT)
ADJUSTIV1ENT
POINTS
UIAL
SETTING
INDICATO
R
CO¡iN
ECTION
(VTVM,
SCOPE
and
DISTORT.ION
METER)
T201
tAl
L8
1OSC
Coil)
L7
(Buffe¡
Coill
L6
(2nd
DET-2)
L5
{2nd
DET-I}
L4
{1st
DET-2)
L3
{1st
DET-1)
L2
(ANT-2
Coil)
L1
(At.lT-]
Coil)
T1
(MlX
Coil)
Connect
scope
10 output
lerminai.
90MHz
(10f/o
lv4cd.
with
4OOHZ)
90MHz
Connect
signal
genera-
tor
10
coaxial
antenna
terminal
through
FM
dúmmy
antenna.
.
Short
bet\ryeen
TF302 and
TP303
.
Adjust
for max¡mum
outPUl.
.
Repeat steps
(
1
), {3)
and
(4).
CT8
(OSC
Trimmþr)
CT7
(BuÍfer
Trirnþer)
CT6
(2nd
DET-2)j
CTS
(2nd
DET-lll
cT4
(1s!
oET.2)
i
cT3
(1st
DET-1)
|
CT2
(ANT-2
Trirtrmer)
CT1
(liNT-1.
Triøimer)
106MHz
Connect
scoPe
to output
teiminal.
1 06MHz
{1OCPlo
Mod.
with
400H2)
Connect
signal
genera-
tor tc
coaxial
antenna
terminal
thorugh
FM
dummy
aòtenna.
V
R5O4
1
00MHz
Connect
dislort¡on
meleí
1o
1 OOMHz
output
terminal
1 00MHz
MO
T102
[WtDE
IFT]
IA]
betvveen
DC
CÕnnect
ofPoint
non-
and
TP1
O
ter-ference
Cotnect
DC
VTVM
belween
TP201
and
chassis
T2C1.tNARÉOW
IFTJ'
tA)
DISTOBTION
ALIGNMENT
OUTPUT
LEVEL
ALIGNMENT
No-signal
No-si-ônal
of
non-
¡nler-fergnce
Connect
signal
genera'
lor
to coaxial
antenna
term¡nal
ihrough
FM
ciummV
antenna.
100MHz
(
1
00%
Mcd.
with
400H2)
.
lF
selectcr
switch
io
"wide"
.
Tuning ât
100MHz
.
Adjust
for
rninimum
díslortion
loOMHz
{100/"
Mod.
with
400H2)
Connect
signal
genera"
lor to coaxial
antenna
ierminal
ihrough
Fl'/
dummy
anienna.
1 00MHz
(100Yo
Mod.
wirh
400H2)
Connect
distortion
meier
io
oulPut
terminal
Cqnnect
AC
VTVM to
output
term¡nal
T102
(V!rtDE
IFT)
t rrl
.
lF
s?lector
switch
tc
"tJ¡de"
.
Tunino êt
100
Miìz
.
Short 6etween
TP3O2
and
TP303
.
AdiLrst
lor
minimvm
distortion'
.
Repeai sieps {8)
(9)
and
(7)-
T2O1
(NAñROIV
IFT)
tBi
o
lF
selector
switch
tb
"wiCe"
.
Tunino at
100Mi+2.
.
AoiusivRso+
to
1.4v
cn
\-/TVl'/
indication
Adjust
for
OmV
of
VTVM
inciication
WIDE
IF
AND
NARBOì¡I
IF OUTPUT
LEVEL
ALIGNMENT
o
Short
between
TF302 and
TP303.
.
Tuning
ât
100
MHz
.
Ad¡usi'./R503
ic
1'4v
on
vîvM
ìñdicaiicn
V
P5C3
1 00MHz
Connect
A.C
VTVM to
our-
pul
terminal.
Connect signal
genera-
lor to coaxial
antenna
terminal through
FM
dummy antenna.
100MHz
(10ff2É
tr4od:
with
4COHz)
MUTING
ALIGNMENT
.
Servo tunìng
slviich
to
"ôuto"
.
Tunino at
100
MHz
.
Ad.iusifor
maximurn
on
VTVM
Conñèct
DC
VTVM be¡¡¡een
TPi
02 ãnd chassii.
T2O2
(MUTING
IFT)
T203
(MUTIi.lc
IFT)
Connecl
signal
genera-
tor
to coaxíal anlenna
terminal through
FM
dr.immy antenna.
i
00MHz
('10C96
Mod.
with 4oOHz)
1 00MHz
f n
ihe
st61e
where
ad.iust,'nents
in
tÈe thern
1 1
hàve
been
completeC,
fully
turn
VR402
clcckwise'
and
then turn ttle
same
counlerclock-
rhe
Connect
AC
VTVM to
output
terminal,
';
Connect
signal
genera-
iôr
to coaxial
antenna
lerminal through.
FM
100MHz
(100%
Mod.
with
400H2)
00Ml{z
l
FM
SI
tor
¡o
en
13
terminal
dummy
enlenna
Apply
16dB
Conneci
tor to
1. Modul¿i¡ng
ii
2.
MODUI-ATI{:
3. OUTPUT
ÑiC
4.
PlLOT
si-onaii
5. MPX CUT...J
15
16
17
¡o
Piloi bandpass
19
Subcarr!er
cancel
20
\'vide
separêtion
21
Nerrc\ /
æp3f
atiofr
22
Auto
high-
bleñd
terminal
through'
dumrny
anlenna
ì
Apply
1OOdB
(10
îc set.
14
j
.:l
'a
:l
23
I
CONNECTI(
CIRCUIT
TO
BÉ
ADJUSTSD
Voltage
Ccn'
troiled
Osciì-
lator
{19kHz
Oscill¿tíonl
Level
align-
ment bgt-
ween L anci
R
P¡loi cancel
Auio
lf
seleclo
i'
-9030