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| ST-S770ES
SECTION
5
P
;
F
:
DIA
djustment
Stereo Operation Adjustment
Pilot Cancell Adjustment
AM SECTION
GRAMS
EG
- WIDE
a
eats - WIDE
Setting:
* Semiconductor Location
MUTING
switch: OFF
FM BF stereo
Ref. No.|
Location
||Ref. No.|
Location
||/Ref. No.| Location
:
loop ante.
TT
Bi
ee
se! Generator
VTVM
te8
D101 | C-20
D627 | J-22
0233 | D-18
D102
C-19
D628
1-22
Q234
E-18
AM RF SSG
D103 | C-20
D651 | H-31
Q235 | E-18
D104
B-16
D671
C-28
Q241
D-17
(rk
Dis1 | c-22
|| D701 | G1
a251 | J-17
oO
1
FM ANTENNA
(75 21)
D152
C-21
D703
H-12
Q252
I-15
;
FM ANTENNA
Oo
',
:
D201
D-18
D901
E-20
Q253
1-15
Carrier frequency:
98 MHz
(75 Q)
ne
pd
lois
D202 | D-18
|| D902 | E20
|| a254 | 1-15
Modulation:
FM FF Stereo signal
400 Hz signal
D203
G-17
D903
E-20
Q255
J-15
Output level:
10 wV (20 dB)
Carrier frequency:
98 MHz
AM !oop
i
a:
ai
pte
pee
vue
Procedure:
A ci ahs
eee ve ne
antenna
VTVM
b242 | E-17
pg0s | F-20
a271 | J-20
1: Tune the Sette oe MHA
utput
level:
m
HL
D273
1-20
D911
G-21
Q272
1-18
und (The set turns
2. Adjust
RV251
hat the STEREO
indi
p
dite:
D274
1-20
D912
G-21
Q301
F-23
5
just
so
thatthe
indicator goes on.
rocedure:
D275
J-19
D913
F-22
0302
H-28
10 mV)
1. Turn the set to 98 MHz.
=
D276
J-18
D914
F-21
Q303
F-23
che VTVM (TP271)
FM Muting Level/IF Narrow Gain Adjustment
2. Adjust RV303 and L301 alternately for minimum
:
Setting:
reading onthe VTVM andalso tune the both channel
as
nee
ene
ad
Sat
oe
rtion reading onthe
IF BAND : WIDE
? . Fests — da Beles at this time.
AM antenna
Pre
p279 | J-18 =|) p931 | F-21
'|| a306 | C-24
istortion adj.)
MUTING switch: ON
e A PAE Ee Step eSeVc le) NGS:
p301 | G-24
|| p932 | G-20
|| a308 | B-26
| times.
FM RF SSG
deviesens
D302
G-23
1C201
D-18
Q309
B-25
201.
Stereo Separation Adjustment
p303 | G23
|| ic202 | E19
'(|| 0310 | H-28
ae
Setting:
.
D304
G-25
1C251
1-16
Q401
H-28
;
AM Meter Level Adjustment
D305
| G-25
C271 | 1-17
Q402 | H-27
o——-0
IF BAND : WIDE
I
;
Setting:
D307
1-27
IC272 | 1-18
Q403
H-27
:
2
EM RE stereo
Canepa
D310 | H-27
1C301 | F-24
Q404 | G-26
'igital Goherstcr
oie)
arrier
frequency:
216 kHz
FM ANTENNA
OUTPUT
Vi
Modulation:
400 Hz, 30% modulation
D311
H-27
1C401
F-27
0405
G-27
VT VM
oe
D312
H-16
1C501
C-16
Q406
H-26
D313
1-28
1C601
J-25
Q407
G-26
'de range)
Carrier frequency:
98 MHz
Procedure:
D401
F-25
1C602
|-27
Q408
H-27
|
Modulation:
FM RF Monaural signal
1. Set AM RF signal generator so that the AM antenna
D402
H-26
1C701 | G-4
0451
E-27
Output level:
12.6 uw V (22 dB)
input level becomes 74 dBu/m (5 mV/m.)
FM ANTENNA
OUTPUT
2. Adjust RV401 so that 1- 10 indication bars light up
oak
oe
on
ae
0462
Pe
O
Procedure:
(75 2)
en
the signal rieter
D601
-23
1C703
G-8
Q453
E-27
O
1. Tune the set to 98 MHz and adjust output level of
'
ae
=
ee
He
Se
Coe
signal generator at 25 dBu (17.8 pV).
Carrier frequency:
98 MHz
D604
1-23
ic911
| G-21
Q456
E-26
2. Turn RV252 at the position where the waveform
Modulation:
FM PF stereo signal
suddenly appears on the oscilloscope (FM Muting
Output level:
10 mV (80 dBu)
D605
1-27
Q101
B-20
Q457
E-26
level adj.)
D606
1-27
Q102
B-18
Q458
E-27
ae
en ees
=
sem | Jz oie | ey | Gan | Bi
100 wv) at
monaural
4. Turn
RV203
at the
position
where the
waveform
FM stereo
VTvm
VTVM
D609
J-23
Q105
B-16
Q502
D-17
suddenly appears on the oscilloscope (IF Narrow
signal generator
f
.
ading on the VTVM.
Gain adj.)
output channel | Connection
neading (dB)
De10 | J-23
a151 | B-23
a503 | D-17
)
D611
J-23
Q152
B-23
Q511
E-16
L-CH
L-CH
@®
1 (100 UV) at stereo
:
D612 | J-23
Q201 | C-17
Q521 | D-16
eae
EN Micrenbevol Gdsient
D613 | J-23
|| Q202 | D-18
|| a522 | E-16
ading on the VIVM.
pass
ener Means
R-CH
L-CH
Adjust RV301 for
D614
J-23
Q203
E-18
Q551
E-16
O)
minimum reading.
D615 | J-23
a204 | G-18
|| as5s2 | F-16
2ading on the VTVM
FM AF SSG
R-CH
R-CH
©
D616 | J-23
a205 | E-19
Q601 | K-27
D617
J-24
0206
G-19
Q603
H-27
D618
J-24
Q207
E-18
Q671
C-27
10 mV) at monaural
L-CH
R-CH
Adjust RV302 for
D619
| J-24
Q208 | G-17
Q701
G-2
'hanical center posi-
paladin yedelng:
D620 | 1-27
a211 | G-19
|| a901 | D-20
D621
1-24
Q212
G-18
Q902
E-20
nee
ea
CH stereo seperation: @) - ®
ee
omer
lee es
Carrier f
ency:
98 MH
et
D624
J-22
Q216
F-17
921
F-20
HRI Aa
ster ee
Madison:
:
FM RF Monaural signal
reli stereo separanon: ©) 0)
Output gels
3 mV (70 dBu)
The separations of both channels should be equal.
D625
J-23
0231
D-18
Q931
G-19
n distortion.
:
D626
J-22
0232
D-18
Procedure:
a
ee
1. Tune the set to 98 MHz.
n distortion.
2. Adjust RV241 so that 1 - 10 indication bars light up
on the signal meter.
-15-
~16-
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