Sony CFS-1085S Service Manual ▷ View online
11
CFS-1085S
FM VCO Adjustment
Procedure :
1. Connect the frequency counter to 4 and 7 pins of IC1 as
shown the figure.
2. Turn the set to 98MHz.
3. Adjustment RV1 for 76kHz
3. Adjustment RV1 for 76kHz
±
500Hz reading on frequency
counter.
Adjustment Location :
telescopic
antenna
terminal
terminal
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.032V (90dB)
0.01
µ
F
set
C14
C15
C000
C000
C18
C20
C19
C5
R7
R8
R24
R11
R9
R16
R6
R4
R5
C4
C16
C17
C31
CF1
C9
C13
VR1
FINE
L2
B
C
E
Q2
IC1
TUNER BOARD
(Conductor side)
(Conductor side)
A
CN304
1
6
1
4
7
15
16
30
CF3
frequency
counter
1
µ
F
+
33k
33k
Ω
CT2 : FM Frequency Coverage Adjustment
L2 : FM Frequency Coverage Adjustment
CT4 : MW Frequency Coverage Adjustment
T1 : AM IF Adjustment
L3 : MW Tracking Adjustment
CT3 : MW Tracking Adjustment
CT1 : FM Tracking Adjustment
L1 : FM Tracking Adjustment
L4 : MW Frequency Coverage Adjustment
L8 : SW2 Frequency Coverage Adjustment
CT8 : SW2 Frequency Coverage Adjustment
CT6 : SW1 Frequency Coverage Adjustment
L6 : SW1 Frequency Coverage Adjustment
RV1: FM VCO Adjustment
L7 : SW2 Tracking Adjustment
L5 : SW1 Tracking Adjustment
(Component side)
TUNER BOARD
12
CFS-1085S
SECTION 4
DIAGRAMS
4-1. CIRCUIT BOARDS LOCATION
POWER BOARD
LED BOARD
TUNER BOARD
GE SW BOARD
VOL BOARD
MEGA BASS SW BOARD
MIC BOARD
MAIN BOARD
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
Note:
The components identified by mark
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply frombattery terminal .
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark
: FM (RADIO SECTION), PLAY (TAPE SEC-
TION)
( ) : MW (RADIO SECTION), REC (TAPE SEC-
TION)
< > : SW1,2
( ) : MW (RADIO SECTION), REC (TAPE SEC-
TION)
< > : SW1,2
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
WAVEFORMS
1
2
T301
Q301
B
250Vp-p
18.3
µ
sec
5.5Vp-p
18.3
µ
sec
VOLT/DIV : 50V AC
TIME/DSIV : 5
TIME/DSIV : 5
µ
sec
VOLT/DIV : 2V AC
TIME/DSIV : 5
TIME/DSIV : 5
µ
sec
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD/TV LINE IN
• Abbreviation
EA:Saudi Arabia
CFS-1085S
13
13
4-2. BLOCK DIAGRAMS
B+
B+
CF3
B+
ANT1
FM/SW
TELESCOPIC
ANTENNA
S1-8
S1-5
S1-7
S1-6
S1-6
S1-3
S1-2
SW1
TRACKING
SW2
TRACKING
MW
TRACKING
L3,CT3
CT3
CT2
CV1(3/4)
CV1(2/4)
CT1 CV1(1/4)
L2, CT2
FM
FREQUENCY
COVERAGE
L4, CT4
MW
FREQUENCY
COVERAGE
L8, CT8
SW2
FREQUENCY
COVERAGE
L6, CT6
SW1
FREQUENCY
COVERAGE
L1, CT1
FM
FREQUENCY
COVERAGE
IN
IN
FE
OUT
CF4
CV1(4/4)
CT6
CT8
CT4
D5
S1-4
16
22
22
14
24
13
18
20
1
7
8
9
10
6
8
22
17
8
9
J304
CD/TV
LINE IN
L
R
HE301
ALC
ALC
DET
5
4
23
DET
S302-2
PB
r
REC
S302-1
PB
r
REC
S401
MEGA BASS
OFF
r
ON
BIAS
OSC
Q301
MIC
REC
REC
Q340
B+
RADIO B+
RADIO B+
MIC
I/EX
I/EX
17
RADIO
L.RAD
R.RAD
MIC
R.CD
L.CD
L.IN
L.RO
L.LO
R.LO
R.IN
R.RO
TAPE EQ, REC AMP,
FUNCTION SWITCH
IC301
MEGA BASS
Q102
MEGA BASS
Q202
MEGA BASS
CONTROL
Q310
B+
ANALOG SWITCH
D311
FLAT
D312
GROOVE
D313
LIVE
D314
POPS
D315
CINEMA
RV301
VOLUME
11
10
3
5
12
13
STBY
8
STBY
J302
SPEAKER
J301
PHONES
SP101
SPEAKER
+
–
SP102
SPEAKER
SP201
SPEAKER
+
–
SP202
SPEAKER
LEFT
RIGHT
11
10
3
5
12
13
POWER AMP
IC102
POWER AMP
IC202
GEQ AMP
IC302
Q101
MUTE
Q201
MUTE
S901
VOLTAGE
SELECTOR
220-240V
110-10V
J901
-
AC IN
R
F901
F902
T901
POWER TRANSFORMER
MUTE DRIVE
Q309
MUTE DRIVE
Q307
GEQ CONTROL
Q103, 203, 303
GEQ CONTROL
Q204, 205, 304
B+ ON/OFF
Q305, 306
6V REG
Q302
MOTOR
SWITCH
Q308
M
M601
MOTOR
S601
MD POWER
S301-1
FUNCTION
CD/TV
LINE IN
R
RADIO
r
TAPE/RADIO OFF
S301-1
FUNCTION
CD/TV
LINE IN
R
RADIO
r
TAPE/RADIO OFF
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
6PCS, 9V
RECT
D901-904
S303
SOUND SELECT
D101
D201
CV1(1-4)
TUNING
3
1
5
VOLTAGE DET
IC303
D3
FM STEREO
D302
OPR/BATT
26
• Signal path.
k
: FM
,
: AM
E
: PB
a
: REC
CFS-1085S
14
14
D101 B-6
D201 B-6
D301 B-6
D302 B-9
D303 D-5
D308 D-7
D310 C-7
D311 D-12
D312 D-11
D313 D-11
D314 D-11
D315 D-10
D317 D-5
D320 E-5
D321 F-8
D322 F-7
D326 E-8
D901 D-3
D902 D-3
D903 C-3
D904 C-3
D201 B-6
D301 B-6
D302 B-9
D303 D-5
D308 D-7
D310 C-7
D311 D-12
D312 D-11
D313 D-11
D314 D-11
D315 D-10
D317 D-5
D320 E-5
D321 F-8
D322 F-7
D326 E-8
D901 D-3
D902 D-3
D903 C-3
D904 C-3
IC102
B-5
IC202
B-7
IC301
D-6
IC302
F-7
IC303
D-4
Q101
B-7
Q102
G-6
Q103
C-8
Q201
C-6
Q202
G-6
Q203
C-7
Q301
F-6
Q302
D-5
Q303
C-8
Q305
D-5
Q306
E-4
Q307
D-5
Q308
D-8
Q310
B-6
Q311
E-10
Q312
E-10
Q340
C-7
4-3. PRINTED WIRING BOARD – MAIN SECTION –
• See page 12 for Circuit Boards Location.
Ref. No.
Location
• Semiconductor
Location
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
•
: Pattern of the rear side.
MAIN BOARD
POWER BOARD
E
C
B
E C B
B C E
B C E
E C B
E C B
E C B
B C E
B C E
E
C
B
E
C
B
E
C
B
E
C
B
MIC BOARD
GE SW BOARD
t
t
M601
MOTOR
S601
(MD POWER)
M
CD/TV
LINE IN
L
R
B
B
L-CH
R-CH
HE301
ERASE HEAD
HRP101
RECORD/
PLAYBACK
HEAD
C
C
VOL BOARD
11
(11)
1-682-945-
ON
OFF
t
RED
MEGA BASS SW BOARD
11
(11)
1-683-142-
LED BOARD
T901
POWER TRANSFORMER
VOLTAGE SELECTOR
220–240V
110–120V
CNJ901
-
AC IN
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
6PCS, 9V
RIGHT
SPEAKER
LEFT
A
MAIN
BOARD
CN304
D301
J301
PHONES
CNP308
R221
R222
R224
R122
R123
R124
C116
C142
C114
R121
C117
C118
C217
C214
C242
C327
C219
C219
C326
C328
C329
C119
R315
C301
S302
S302
REC
PB
IC302
R101
R321
Q301
C320
C323
CNP305
IC303
R361
C321
C318
R319
Q306
R325
R324
Q305
R365
D303
Q302
D320
C334
C331
C332
C333
IC102
C124
C125
C126
C134
C132
C232
R130
R131
IC202
C223
C224
C225
C226
R230
R226
R225
R231
C234
C230
C229
C228
C130
C127
R232
R132
R236
R136
R363
D302
D302
OPR/BATT
J304
ECM301
R364
J306
R320
R126
C133
C330
S301
FUNCTION
TAPE/
RADIO OFF
RADIO OFF
RADIO
CD/TV
LINE IN
T301
C310
C221
C231
C121
C212
C216
C131
C322
C227
R326
R360
R322
R310
Q307
CNP301
C103
C140
R106
R105
R107
C109
R103
R204
C209
R203
WHT
RED
C309
C316
C312
R301
C308
C104
C101
R102
R202
C304
R303
C302
R304
C313
C102
R330
D317
C305
C337
R337
C105
C106
R309
C210
C339
CN304
R339
R323
C303
R120
R327
Q310
C342
D326
R347
S301
R345
R346
C123
R341
R125
C233
R237
D101
D201
R110
R143
R210
R243
C135
C235
C129
C128
C211
D321
D322
JW329
C111
C143
C244
C144
C243
R349
R366
R201
D310
R329
R220
CNP303
Q308
C107
R104
IC301
C306
R306
R206
R205
C203
C335
R207
C207
C205
C206
C202
C201
D308
C204
C208
C336
C315
C108
R308
R307
C110
C311
JW319
C307
R334
R137
R353
R138
R139
C120
C122
C343
C112
R142
R238
C220
C218
C344
R223
C222
R239
R218
JW304
JW305
JW309
JW310
JW311
JW312
JW313
JW314
JW315
JW324
JW325
JW326
JW327
JW328
JW330
JW331
JW333
JW334
JW336
JW339
JW340
JW341
JW343
JW344
JW345
JW346
JW347
R140
R118
R240
R242
Q202
Q102
Q103
R117
R112
R111
C136
R114
Q303
R348
R113
R213
C236
R211
R212
Q203
Q214
Q217
C241
Q205
C240
R251
Q204
R253
R252
Q340
Q304
R350
R254
R255
RED
RED
C338
C340
Q201
R228
R352
R128
Q101
C341
D305
R312
Q309
R313
R311
D304
B
C
E
B
C
E
11
(11)
1-683-140-
S303
SOUND SELECT
S303
11
(11)
1-683-139-
11
(11)
1-682-946-
1
2
2
3
4
4
1
2
3
1
2
3
1
2
3
RV301
VOLUME
R115
R215
C137
C237
C213
C113
C139
C239
11
(11)
1-683-143-
S401
MEGA
BASS
R351
CNP313
CNP311
JW335
R344
R333
R342
R343
D311
FLAT
D312
GROOVE
D313
LIVE
D314
POPS
D315
CINEMA
S901
F902
R901
1
2
3
C906
CNP902
CNP901
D904
D903
D901
D902
C902
C901
C903
C904
F901
11
(11)
1-683-141-
+
–
+
–
k
Q311
Q312
R317
R331
R362
2
3
4
5
6
7
8
9
10
11
12
13
A
1
B
C
D
E
F
G
H
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