Sony CFS-1085S User manual

CFS-1085S
E Model
RADIO CASSETTE-CORDER
SERVICE MANUAL
SPECIFICATIONS
Model Name Using Similar Mechanism CFS-1065S
Tape Transport Mechanism Type MF-1055-117
9-873-310-03
2003L02-1
© 2003.12
Ver 1.2 2003.12
• Frequency range
FM: Saudi Arabia: 87.5–107 MHz/
Other countries: 87.5–108 MHz
MW: Saudi Arabia: 530–1 605 kHz/
Other countries: 530-1 611 kHz/
SW1: 2.3–7 MHz/SW2: 7–22 MHz
•IF FM: 10.7 MHz,
MW/SW: 455 kHz
• Antennas FM/SW: Telescope/
MW: Built-in ferrite bar
• Recording system 4-track, 2-
channel stereo
• Frequency response 80–10 000Hz
• Speakers Woofer: 10 cm (4 inches)
dia., 6 Ω,cone type/Tweeter: 2 cm
(13 ⁄16 inch) dia.
• Input CD/TV LINE IN jacks
(phono jacks), sensitivity 0.436 V,
input impedance 47 kΩ
• Output Headphones jack (stereo
minijack), for 6–32 Ωimpedance
headphones
• Maximum Power output
10 W
• Battery life
FM Recording: Sony R20P: Approx.
5 hours/Sony LR20 alkaline:
Approx. 10 hours
Playback: Sony R20P: Approx. 1.5
hours/Sony LR20 alkaline:
Approx. 3 hours
• Power requirements
110–120V/220–240 VAC
selectable, 50/60 Hz
9V DC, six R20 (size D) batteries
• Power consumption
AC 14 W
• Dimensions Approx. 579 x 206 x
197 mm (w/h/d) (22 7⁄8x 8 1⁄8x
7 7⁄8inches) incl. projecting parts
and controls, not incl. handle
• Mass Approx. 4.6 kg (10 lb 2 oz)
incl. batteries
• Supplied accessory AC power
cord (1)
Design and specifications are
subject to change without notice.
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation

2
CFS-1085S
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE
WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
TABLE OF CONTENTS
1. GENERAL .......................................................................... 3
2. DISASSEMBLY
2-1. Power Board ......................................................................... 4
2-2. LED Board, GE SW Board, MEGA BASS Board................ 5
2-3. MAIN Board, MIC Board, VOL Board ................................ 5
2-4. Mechanism Deck, Tuner Board ............................................ 6
2-5. Record/Playback Head (HRP101), Erase Head (HE301),
Belt, Motor (M601) ............................................................. 6
2-6. Dial Pointer Installation ........................................................ 7
3. ADJUSTMENT .................................................................. 8
4. DIAGRAMS
4-1. Circuit Boards Location ...................................................... 12
4-2. Block diagrams ................................................................... 13
4-3. Printed Wiring Board – Main Section –.............................. 14
4-4. Schematic Diagram – Main Section – ................................ 15
4-5. Schematic Diagram – Tuner Section –................................ 16
4-6. Printed Wiring Board – Tuner Section – ............................. 17
4-7. IC Block Diagrams ........................................................... 18
5. EXPLODEDVIEWS
5-1. Rear Cabinet Section........................................................... 20
5-2. Front Panel Section ............................................................. 21
5-3. Speaker Section................................................................... 22
5-4. Mechanism Deck Section (1) .............................................. 23
5-5. Mechanism Deck Section (2) .............................................. 24
6. ELECTRICAL PARTS LIST .................................25

3
CFS-1085S
SECTION 1
GENERAL This section is extracted from
instruction manual.
Location of controls
PHONES FUNCTION
VOLUME
SOUND SELECT
BAND FINE TUNING
TUNING
FM STEREO
CD/TV
LINE IN MIC
MAXI BASS
OPR/
BATT

4
CFS-1085S SECTION 2
DISASSEMBLY
2-1. POWER BOARD
Note: Disassemble the unit in the order as shown below.
Note: Follow the disassembly procedure in the numerical order given.
Set Power board
LED board, GE SW board, Mega bass SW board
Record/playback head (HRP101), Erase head (HE301),
Belt, Motor (M601)
Main board, MIC board, VOL board
Mechanism deck, Tuner board
Cabinet (rear)
Cabinet (front)
Screws (3X4)
Power board
1
Tuner board
(CNP1)
4
2
6
Screws (3X4
)
1
Screws (3X10)
5
Main board
(CNP305)
3
Cabinet (front)
Cabinet (rear)

5
CFS-1085S
2-3. MAIN BOARD, MIC BOARD,VOL BOARD
2-2. LED BOARD, GE SW BOARD, MEGA BASS SW BOARD
Screw (2.6X8)
1
Screw (2.6X8)
1
Screws (2.6X8)
GE SW board
Bracket (B) board
Bracket (B) board
3
Screws (2.6X8)
6
5
7
2
4
LED board
Mega bass SW board
Cabinet (front)
Knob (job)
Screw (2.6X8)
1
Screw (2.6X8)
5
2
7
qg
qd
4
Lever (rec)
MIC board Main board
Bracket (B) board
VOL board
Cabinet (front)
Knob (VOL)
Screws (2.6X8)
qf
Claws
6
Screws (2.6X8)
3
CNP301
qs
CNP304
qa
CNP302
0
CNP303
9
CNP306
8

6
CFS-1085S
2-4. MECHANISM DECK,TUNER BOARD
2-5. RECORD/PLAYBACK HEAD (HRP101), ERASE HEAD (HE301), BELT, MOTOR (M601)
Screw (3X8)
Tuner board
0
qa
8
2
4
6
9
Screws (2.6X8)
3
Screws (2.6X8)
3
Screws (2.6X8)
5
Screws (2.6X8
)
1
Screw (2.6X5)
7
Mechanism deck
Pointer chassis
Chassis
Pointer
Knob (tun)
Cabinet (front)
(HE301)
(HRP101)
Claws
Record / playback head
Erase head
Motor
(M601)
Belt
1
Claws
3
Screws (2.6X5)
5
7
4
2
6

7
CFS-1085S
2-6. DIAL POINTER INSTALLATION
PVC shaft
Chassis
Knob (tune)
Knob (tune)
Chassis
Window
Pointer
Pointer
Notch
Tuner board
MIN
(Fig-2)
MIN
Screw (2.6X5)
5
2
1
(Fig-1)
1Turn the PVC shaft fully counterclokwise.
2Place the pointer in the chassis groove.
3Line up the tip of the pointer with the notch in the chassis.
(Fig-1)
4Attach so that the knob (Tune) is at the position shown in
Fig-2.
5Fasten the knob (tune) to the PVC shaft with the screw.

8
CFS-1085S
3-2. ELECTRICAL ADJUSTMENTS
TAPE SECTION
z Switch location
FUNCTION switch................. TAPE (RADIO OFF)
SOUND SELECT.................... FLAT
VOLUME................................. mechanical center
MEGA BASS............................ OFF
TestTape
Type Signal Used for
WS-48B 3kHz, 0dB Tape Speed Adjustment
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :record/playback head pinch roller
erase head rubber belts
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power sup-
ply voltage (9V) unless otherwise noted.
1.Torque Measurement
Mode Torque Meter Meter Reading
2.95 – 6.86 mN•m
Playback CQ-102C (30 – 70 g•cm)
(0.42 – 0.97 oz•inch)
0.15 – 0.53 mN•m
Back Tension CQ-102C (1.5 – 5.5 g•cm)
(0.021 – 0.076 oz•inch)
5.4 – 13.2 mN•m
Rewind CQ-201B (55 – 135 g•cm)
Fast Forward (0.77 – 1.87 oz•inch)
2.TapeTension Measurement
Mode Torque Meter Meter Reading
FWD CQ-403A more than 100g (3.53 oz)
SECTION 3
ADJUSTMENTS
0dB = 0.775 V

9
CFS-1085S
Tape Speed Adjustment
Procedure :
Mode : playback
Adjustment Values :
Digital frequencycounter
2,910 to 3,090Hz
Frequency difference between the begining and the end of the
tape should be within 1% (30Hz)
Adjustment Values :
tape speed adjustment
control inside motor
set
test tape
WS-48B
(3kHz, 0dB) 32
Ω
digital frequenc
y
counter
phones jack

10
CFS-1085S
TUNER SECTION
MW Section
Procedure :
BAND Switch : MIN
FINE TUNE control : mechanical center
SW Section
Procedure :
BAND Switch : SW1, SW2
FINE TUNE control : mechanical center
FM Section
Procedure :
BAND Switch : FM
FINE TUNE control : mechanical center
( ) : Saudi Arabia model
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz
CT4 1,680kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 620kHz
CT3 1,400kHz
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 2.2MHz
CT6 7.3MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 2.2MHz
Confirmation 7.3MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8 6.8MHz
CT8 22.5MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7 6.8MHz
Confirmation 22.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5MHz (87.35MHz)
CT2 109.5MHz (107.8MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.5MHz (87.35MHz)
CT1 109.5MHz (107.8MHz)
AM RF signal
generator
30% amplitude modulation by
400Hz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
12PF
Adjustment Location : Mechanism deck
z Switch location
FUNCTION switch................ TAPE (RADIO OFF)
SOUND SELECT.................. FLAT
VOLUME.............................. mechanical center
MEGA BASS......................... OFF
TUNER SECTION
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
32Ω
J301 (phones)
level mete
r
FM RF signal
generator
22.5kHz frequency deviation by
1kHz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
0.01µF
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

11
CFS-1085S
FMVCO 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 ±500Hz reading on frequency
counter.
Adjustment Location :
telescopic
antenna
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)
A
CN304
1
614 7 15
1630
CF3
frequency
counter
1
µ F
+
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 Adjustmen
t
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 BOAR
D
LED BOARD
TUNER BOARD
GE SW BOARD
VOL BOARD
MEGA BASS SW BOARD
MIC BOARD
MAIN BOARD
Note:
• All capacitors are in µFunless otherwise noted. pF:µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
Note:
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
• Voltages aretakenwitha VOM(Inputimpedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
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 : 5µsec
VOLT/DIV : 2V AC
TIME/DSIV : 5µsec
• 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
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
Q340
B+
RADIO B+
RADIO B+
MIC
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
5VOLTAGE 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
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. PRINTEDWIRING 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
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 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
3
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
23 4 5 6 7 89 10 11 12 13
A
1
B
C
D
E
F
G
H

CFS-1085S
15 15
4-4. SCHEMATIC DIAGRAM – MAIN SECTION –
• See page 12 for Notes.
• See page 12 forWaveforms.
• See page 33,34,35 for IC Block Diagrams.
C306
R306 C209 R207 R205
C205 C203 R206
C206
C211
C207
R204
CNP301 R203
C311
R103 C111
C107
R104
C106
C105
C109
R107 R105
C103 R106
C305
IC301
C302
R304
R330
R303
C304
C303
S302(2/2)
R323
Q340
Q301
R322
C322
R321
R320
T301
C323
R310 C310 C320
J304
C301
R101
R201
R102 R202
C201
C101
D310
C110
C210
Q307
CNP304
R337
D317
C314
S302(1/2)
D308
R307
C307
R309
C309
R308
C208
C108
R239
R139
R138
R238
C122
C222
C220
C120
C308
C315
C312
C102
C104
R118
R218
C202
C204
Q202
R220
R240 C212
R242
C112
R142
R140
Q102
C221
C231
C113
C213 C237
C137 R115
R215
RV301
C239
C227
R230
C228
C229
C226
R232
Q304
R253
C241
R255
R350
R349
C340
C338
R348
R347
Q205
R251
C240
R214
R252
R254
R222
C218
C217
Q103
R117
R112
R113
C326
C329
C328
C327
R224
Q303
R114
C225
C223
D326
Q310
D311
D312
D313
D314
D315
R342
R343
R344
S303
R317
D304 R311
Q309
R313 R312 C341 D305
D320
Q302
C334 IC303
D303
R365
R325
R334
CNP305
R361
C321
Q308
CNP303
M601
R319
R326
Q306
R324
D302
R362
C331
C332
D201
C235
R237
R137
C133
C233
D101
R236
J301
C128
C129
R132
C127
C130
R128
C125
C123
R130
C339
C126
C124
C219
R315
R120
R301
R329
R327
R122
C118
R124
C117
D322 R346
R345
D321
C116
C119
R213
C236
R212
Q203 R217
CNP902
R901
C906
C901
C902 D902
D901
D904
D903
C904
C903
F901
S901
T901
CNP901
Q305
Q204
ECM301
S301(1/2)
CNJ901
S601
SP102
SP101
SP201
SP202
HRP101
HE301
C121
C131
C136
R123
C337
IC302
R131
C230
R223
R360
R231
R228
R136
S401
C335
C140 C313
C214 C216
R221
R121
C114
R339 C336
C333
R364
C318
R367
F902
R353
R352
C316
C139
R125
R126
C135
C224
C234
R225
R226
C232
C132
C142
C343
C242
C344
Q312
Q311
R331
R333
C243
C143
C144
C244
R111 R211
R351
R363
R366
Q101
D301
R341
Q201
C330
R110
R210 R243
R143
C342
C134
J306
IC102
IC202
47
16V
1M 100
10V 68 68k
0.0022 0.047 2.2k
0.001
100p
470p
15k
4P 47
470
10V
47 100p
470p
15k
0.001
0.0022
100
10V 68 68k
0.047 2.2k
10
50V
TA2068N
0.1
50V
1.5k
10k
100
0.001
0.1
50V
150
KRA111M-AT
KTC3198GR-AT
10
2200p
6.8k
150
BIAS COIL
470p
22k 0.01 47
16V
0.01
47k
47k
3.3k 3.3k
0.47
50V
0.47
50V
1SS133T-77
0.47
50V
0.47
50V
KRA102M-AT
6P
100k
1SS133T-77
1000p
1SS133T-77
10k
10
50V
10k
10
50V
10k
10 50V
10 50V
6.8k
6.8k
1k
1k
0.22
0.22
0.1
0.1
10
50V
1000p
100
10V
1000p
100p
100k
100k
1000p
100p
KTC3198GR-AT
10k
1k 10
50V 1k
10
50V 1k
1k
KTC3198GR-AT
0.22
0.1
1
50V
1
50V 4700p
4700p 1k
1k
20k
1
50V
100
10V
220
0.22
0.22
100p
10k
KRC107M-AT
220k
1
50V
100k
1k
100
100
10V
1
50
100k
2.2k
KTC3198GR-AT
100k
1
50V
1k
4.7k
100k
2.2k
0.0047
0.1
KTC3198GR-AT
100k
1k
10k
47
16V
100 10V
22 50V
10 50V
470
KTC3198GR
1k
100p
47V 16V
1SS133T-77
KRC110M
L-34HD
L-34HD
L-34HD
L-34HD
L-34HD
10k
10k
10k
680
1SS133T-77 1k
KTA1266-GR
47k 1k 4.7
50V 1SS133T-77
1SS133T-77
2SC2001
0.01 MM1468XD
RD6.8EB2
220
10k
2.2k
4P
22k
100
10V
2SC2001
4P
2.2k
10k
KRC107M-AT
10k
L-34HD
680
100 10V
0.01
1SS133T-77
0.22
1k
1k
10
50V
10
50V
1SS133T-77
100
0.22
0.22
10k
100
10V
100
10V
1k
100p
47V 16V
220
4700
16V
100p
47V
16V
1
50V
47
10k
47
1.5k
1.5k
2.2k
0.0047
470
0.1
1SS133T-77 10k
10k
1SS133T-77
2200p
1
50V
10k
0.1
1k
KTC3198GR-AT 100k
4P
2.2k
1000
16V 0.022
0.022 2A2M
2A2M
2A2M
2A2M
0.022
0.022
T315mAL
3P
KTA1266-GR
KTC3198GR-AT
0.22
0.1
0.1
1k
10
50V
AN7338K
1k
100
10V
1k
1k
1k
1k
100
100p
100p 100
10V
100p 2200p
3.3k
3.3k
100p
6.8k 10
50V
470 10V
0
47
10V
100k
T2.5AL
10k
6.8k
4.7
50V
1
50V
2.2
2.2
0.22
47V
16V
100
16V
2.2
2.2
10
50V
10
50V
100p
100p
100p
100p
KRC107M-AT
KRC107M-AT
2.2k
2.2k
0.01
0.01
0.01
0.01
220 220
47k
330
3.3k
DTC343
1SS133T-77
1M
DTC343
2.2
50V
680
680 6.8k
6.8k
1
50V
100 10V
BA5417
BA5417
R
L
AGC
GND
MIC.NF
MIC
I/EX
REC
VCC
TAPE
MIC
RADIO
V.REF
PB
REC
MUTE
+B
RCH
GND
LCH
R.PO
R.CD
R.RAD
R.LO
LLO
L.RAD
L.CD
LPO
L.NF
L.RO
L.IN
CONT
NC
VM
GND
VCC
TC
NC
VOUT
GND
9V
AC
4.5V
RIN
NFIR
BFR
TFR
NF2R
ROUT
POPS
FLAT
GND
VCC
RR
MUTE
VREF
LOUT
NF2L
TFL
BFL
NF1L
LIN
GND
GND
GND
GND
RIN
R,RO
R.NF
SPOUT
SPOUT
VCC
ST.BY
SPOUT
SPOUT
VCC
ST.BY
CINEMA
LIVE
GROOVE
ST LED +B
PB
REC
GROOVE
LIVE
POPS
CINEMA
(MOTOR) (MD POWER)
FLAT
RIN
GND
GND
LIN
VOLUME
POWER AMP
POWER AMP
SOUND SELECT
MUTE DRIVE
REG
+B ON/OFF
VOLTAGE
DET
FUNCTION
TAPE/RADIO OFF
RADIO
CD/TV
LINE IN
S301
FUNCTION
TAPE/RADIO OFF
RADIO
CD/TV
LINE IN
S301
VOLTAGE SELECTOR
120V
240V
220V
110
POWER
TRANSFORMER
SWITCH
MOTOR
+B ON/OFF
OPR/BATT
MUTE
MUTE
GEQ CONTROL
GEQ CONTROL
GEQ CONTROL
BUFFER BUFFER
GEQ CONTROL
MEGA
BASS
MEGA
BASS
MIC REC
BIAS OSC
TAPE EQ,REC AMP,
FUNCTION SWITCH
GEQ AMP
ON
OFF
2
1
3
4
5
6
7
1
2
3
HEAD
RECORD/
PLAYBACK
HEAD
ERASE
1
4
R
L
CD/TV
LINE IN
MIC
DRIVE
MUTE
16
DRY BATTERY
SIZE"D"
(IEC DESIGNATION R20)
6PCS,9V
AC IN
PHONES
RIGHT
LEFT
SPEAKER
SPEAKER
SPEAKER
SPEAKER
14
11
44
+
-
+
-
MEGA
BASS
MEGA BASS DRIVE
4
5
6
7
8
CNP308
LED DRIVE
LED DRIVE
S301(2/2)
BOARD
TUNER
CN304

CFS-1085S
16 16
4-5. SCHEMATIC DIAGRAM –TUNER SECTION –
• See page 12 for Notes.
• See page 19 for IC Block Diagrams.
CNP1
CV1
S1(8/8)
C1
L5
D1 D2
C22
L7
S1(5/8)
S1(6/8)
S1(7/8)
C24 CT6
L6
C23 CT8
L8
C25
L4
C26
C27
C28
S1(1/8)
S1(3/8)
R16
R14 C34
Q1
R15
C21
CF3
R6
C11
C20
R11
C19
C6
C5
R2
C7
C3
C2
C37
L13
R3
CF4 R5 CF1
R4 C9
Q2
C13
R19
S1(4/8)
D5
C15
C10
C12
R24
C31
C17
R8
R7
C16
R9
C18
CN304
S1(2/8)
C36
C29
L2
L1
R13
C14
RV1
T1
VR1
IC1
ANT1
C4
D6 R20
Q3
R21
R22
R25
D3
R18
220p
1SS133 1SS133
4.7p
3p 3p
1500p
4700p
390p
1k
100k 0.001
KRC3198GR
1k
10
10V
100
2.2
50V
0.47
50V
2.2k
4.7
50V
10
50V
100k
2.2
0.01
100p
0.47
2.2k
680
330 100p
KRC107M-AT
0.01
10k
1SS133
150V
47 16V
47 16V
150
0.01
0.01
6.8k
6.8k
0.01
680
150V
0.001
20p
10k
4.7
50V
22k
100K
CXA1538S
FM/SW
TELESCOPIC
ANTENNA 0.01
1SS133 10k
KRC107M-AT
10k
10k
3.3k
L-34HD
3.3k
R
L
FM
SW1
SW2
MW
FM
SW1
SW2
MW
GND
MUTE
ST
*
**
*
*
-3
CV1-CT3
CV1-1
CV1-CT1
CV1-2
CV1-CT2
CV1-4
CV1-CT4
CV1(1/4) CV1(2/4)
CV1(4/4)
EA
C2
C6
FM
SW1
SW2
MW
FM
SW1
SW2
MW
FM
SW1
SW2
MW
FM
SW1
SW2
MW
FM
SW1
SW2
MW
+B
FM/AM
DET,FM MPX
FRONT-END,IF,
FM
SW1
SW2
MW
REF
18P
18P
12P 10P
E
33P
C25
33P
FERRITE-ROD
L3
ANTENNA
FM
TRACKING
FM VCO
FREQUENCY
COVERAGE
FREQUENCY
COVERAGE
FREQUENCY
COVERAGE
FREQUENCY
COVERAGE
FM
AM IF
FINE TUNING
L5
TRACKING TRACKING TRACKING
L7
MW
SW2
SW1
MW
L1,CT1
L2,CT2
MW
L8,CT8
SW2
L6,CT6
SW1
FINE TUNING
SELECT
BAND
L3,CT3 L4,CT4
E
TUNING
FM STEREO
BOARD
MAIN
CNP304

17
CFS-1085S
4-6. PRINTED WIRING BOARD –TUNER SECTION –
• See page 12 for Circuit Boards Location.
Ref.No. Location
• Semiconductor
Location
D1 E-5
D2 E-5
D3 D-1
D5 D-1
D6 A-4
IC1 B-3
Q1 E-2
Q2 A-4
Q3 B-4
Note:
•X: parts extracted from the component side.
•: Pattern of the rear side.
C14
C15
C12 C10
C18
C20
C19
C5
C11
C21
R7
R20
R22
R21
R8
R24
R11
R9
R16
R13
R2
R18
R6
R4
R3
R5
R19
R25
R15 R14
C38
C34
C7
C4
C36
E MODEL
C6
C2
D5
C16 C17
C31
CF1
CF4
C9
C13
C28C25
C27
C22
C1
C23
C26
C29
C24
B
C
E
Q1
L6 L8 L4 L7
L5
CT8CT6
CV1CV2
CV3CV4
CT3CT4
CT1CT2
VR1
FINE
TUNING
D3
FM STEREO
RV1
D2D1
1
2
CNP1
ANT1
FM/SW
TELESCOPIC
ANTENNA
L3
MW
FERRITE-ROD
ANTENNA
L2
L1
L13
B
C
E
Q2
B
C
E
Q3
IC1
TUNER BOARD
A
MAIN
BOARD
CN304
CN304
1
6
CF3
T1
CV1-4
TUNING
-2
-1
-4
-3
-5
-8
-6
-7
S1
BAND
FM SW1 SW2 MW
tt t
13
(13)
1-651-230-
D6
1 5 10 15
16202530
23 4 5
A
1
B
C
D
E
F

18
CFS-1085S
IC303 MM1468XD (MAIN board)
4-7. IC BLOCK DIAGRAMS
IC301 TA2068N (MAIN board)
1
N.C
2
B.S.2
3
OUT1
4
B.S.1
OUT2
VCC
5
POWER GND
6
ST-BY
7
FLTR
8
NF1
9
IN1
10
IN2
11
NF2
12
PRE GND PRE GND
13 14 15
BS BS
ST. BY
FILTER
T. S. D
23 22 21
4 5 6321
2024
7dB
LOGIC
ALC1
DET
26dB
151617
987 10 11 12
1819 14 13
7dB
ALC2
26dB
15k 6k 6k
10k
10k
10k
10k
10k
10k
10k
10k
10k 10k 10k
10k
10k 10k
1k 1k
1k
1k
LINE
RADIO RADIO
TAPE
TAPETAPE
L.RAD MIC I/EX L.CD RADIO R.CD TAPE R.RAD MIC REC L.LO R.LO VCC
LINE
TAPE
BUF AMP
A2
BUF AMP
B1
BUF AMP
B2
BUF AMP
A1 MIC
AMP1
MUTE
MUTE MUTE
ON
ON ON
NAB
AMP2
MONITOR
AMP
MONITOR
AMP
NAB
AMP1
REC
AMP2
REC
AMP1
REF AMP 2.1
L.PO
L.NF
L.RO
L.IN
R.IN
R.RO
R.NF
R.PO
MIC
NF
REF
GND
AGC
6
5
LATCH
VOUT
NC
VH
DET
VL
DET
7TC
8VCC
3
4
2
1
GND
VM
NC
CONT VCC
IC102,202 BA5417 (MAIN board)

19
CFS-1085S
IC1 CXA1538S (TUNER board)
IC302 AN7338K (MAIN board)
22 21
4 5 6321
20
TREBLE
BASS
VREF MUTE
τRR
REGULATOR
VCC GND
ANALOG SWITCH
151617
987 10 11
12
1819 14 13
TREBLE
BASS
FLAT
FLAT
FLAT
MIX
MIX
FLAT
LIN
NF1L
BFL
TFL
NF2L
LOUT
FLAT
GROOVE
LIVE
POPS
CINEMA
RIN NF1R BFR TFR NF2R ROUT VREF MUTE RR VCC GND
REG
FM FRONT-END
AM FRONT-END
VCO
REG
MPX REG.
PD 1
PD 2
MONO/ST
SELECT
1/2
COUNTER
1/2
COUNTER
MUTING
DECORD AMP
AUTOBLEND
RIPPLE
FILTER
BAND PASS
MUTE
TUNING
INDICATOR
AM
IF / DET
GND
PLL LPF 1
PILOT DET
LPF 1
PILOT DET
LPF 2
ST IND/
VCO CHECK
RCH OUT
LCH OUT
VCC
RIPPLE
FILTER
AFC/AGC 1 AFC/AGC 2
GND
TUND IND
FM IF IN
AM IF IN
BAND SELECT
PLL LPF2 MPX REG VCO FM DISCRI MUTE AM OSC AFC FM OSC REG OUT FM RF AM RF IN FM RF IN
FM/AM FE OUT
FE GND
235
4678910
111 12 13 14 15
16
17
18
19
2030 29 28 27 26 25 24 23 22 21
FM IF /
DISCRI

20
CFS-1085S SECTION 5
EXPLODEDVIEWS
5-1. REAR CABINET SECTION
NOTE:
• -XX,-Xmeanstandardized parts, so they mayhave
some difference from the original one.
• Items marked “*” are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
The components identified by
mark !or dotted line with mark
!are critical for safety.
Replace only with part number
specified.
2
#5
not supplied
not
supplied
#6
ANT1
F901
F902
T901
#6
#2
1
3
3
6
45
78
1 3-930-876-61 CABINET (REAR) (E)
1 3-930-876-71 CABINET (REAR) (EA)
*2 1-683-141-11 POWER BOARD
3 1-533-233-31 HOLDER, FUSE
4 3-364-532-01 TERMINAL (+ -), BATTERY
5 3-930-901-01 SPRING (BATT -)
6 3-930-900-01 SPRING (BATT +)
7 3-930-878-01 HANDLE
8 3-364-556-01 LID, BATTERY CASE
ANT1 1-501-383-21 ANTENNA, TELESCOPIC
0F901 1-533-460-11 FUSE, GLASS TUBE (DIA.5) (T315mAL)
0F902 1-533-471-11 FUSE, GLASS TUBE (DIA.5) (T4AL)
0T901 1-437-526-11 TRANSFORMER, POWER
• The mechanical parts with no reference number in
the exploded views are not supplied.
• Hardware (# mark) list and accessories are given
in the last of this parts list.
• Abbreviation
EA : Saudi Arabia