Sony CFS-616S User manual
MICROFILM
SERVICE MANUAL
RADIO CASSETTE-CORDER
E Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MF-W616-148
SPECIFICATIONS
CFS-616S
Ver 1.0 1999. 01
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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– 2 –
TABLE OF CONTENTS
1. GENERAL ................................................................. 3
2. DISASSEMBLY ......................................................... 4
3. DIAL POINTER SETTING..................................... 8
4. MECHANICAL ADJUSTMENTS ....................... 9
5. ELECTRICAL ADJUSTMENTS......................... 9
Tape Deck Section .......................................................... 9
Tuner Section .................................................................. 10
6. DIAGRAMS ................................................................. 13
6-1. Block Diagram – TUNER Section – ............................. 13
6-2. Block Diagram – MAIN Section – ................................ 15
6-3. Printed Wiring Board – TUNER Section – ................... 20
6-4. Schematic Diagram – TUNER Section – ....................... 21
6-5. Printed Wiring Boards – MAIN Section – .................... 24
6-6. Schematic Diagram – MAIN Section –......................... 27
7. EXPLODED VIEWS ................................................ 32
8. ELECTRICAL PARTS LIST ............................... 42
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 PUB-
LISHED BY SONY.
Mark Center frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
HOW TO CHANGED THE CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF2.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must changed two pieces together
since it’s supply two pieces in one package as a spare parts.
CF1,
2
mark
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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– 3 –
SECTION 1
GENERAL
LOCATION OF CONTROLS
• Front view
1Cassette compartments
2DIRECTION switch
3DIR MODE switch
4MIC (microphone)
52(PHONES (headphones)) jack (stereo mini-jack)
6VOLUME knob
7OPR/BATT (operation/battery) indicators
8FUNCTION selector
RADIO
DUBBING HIGH
DUBBING NORM
TAPE/RADIO OFF
9BALANCE control
05 BAND GRAPHIC EQUALIZER controls
!¡ PRESET MODE selector
!™ BAND selector
FM
SW1
SW2
MW
!£ TUNING knob
!¢ FINE TUNING knob
!∞ Tape operating buttons
rREC (record) button : Deck B only
(PLAY (playback) button
0REW (rewind) button
)FF (fast-forward) button
p6 STOP/EJECT button
PPAUSE button
1LOCK tab (right side)
2ISS switch
3Telescopic aerial
4SPEAKER terminals
5LOCK tab (Left side)
6VOLTAGE selector
7⁄AC IN (AC power input) socket
8Battery compartment
789
1
2
5
6
3
4
!∞
!£0!¡!™
!¢
• REAR view
56
78
1234
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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– 4 –
CABINET (REAR) SECTION
BATT (–/+) BOARD
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
•This set can be disassembled in the order shown below.
SET CABINET (REAR)SECTION BATT (–/+) BOARD
VOL/MAIN BOARD
TUNER BOARD
BELT, MOTOR
ASSY(W)(M901)
MECHANISM DECK SECTION (MF-W616-148),
REC SW BOARD
POWER (A/B) BOARD
cabinet (front) section
1
three screws
(BTP3
×
16)
1
three screws
(BTP3
×
16)
2
cabinet (rear) section
3
connector
(CNP307)
3
connector
(CNP1)
2
two screws
(BTP3
×
10)
3
BATT (-) board
5
BATT (+) board
4
claw
1
Remove the solder of lead.
6
Remove the solder of lead.
cabinet (rear) sectio
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 5 –
POWER (A/B) BOARD
VOL/MAIN BOARD
1
two screws
(BTP3
×
10)
3
six screws
(BTP3
×
10)
2
bracket (AC)
5
POWER (A/B) board
4
plate (T), shield
cabinet (rear) sectio
n
1
knob (VOL)
3
two claws
4
VOL board
2
two screws
(BTP3
×
10)
5
screw
(BTP3
×
10)
6
claw
7
MAIN board
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 6 –
TUNER BOARD
MECHANISM DECK SECTION (MF-W616-148),
REC SW BOARD
TUNER board
2
screw
(BTP3
×
10)
4
three screws
(P3
×
8)
2
screw
(BTP3
×
10)
7
TUNER board
5
two claws
6
two claws
1
knob (F. T)
3
chassis (tune)
4
two screws
(BTP3
×
10)
4
three screws
(BTP3
×
10)
4
two screws
(BTP3
×
10)
7
screw
(BTP3
×
10)
8
REC SW board
6
DIR chassis section
5
mechanism deck section
(MF-W616-148)
2
Push the "button (ST/EJ1), MD".
2
Push the "button (ST/EJ2), MD".
3
Open the "lid (L), cassette".
3
Open the "lid (R), cassette".
cabinet (front) section
1
three connectors
(CNP304, 305, 306)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 7 –
BELT, MOTOR ASSY (W) (M901)
1
Remove four solders of leads.
5
Remove the chassis (joint) assy
in the direction of the arrow.
3
spring (REC)
4
two screws
(PTT2
×
4)
8
three motor screws
2
screw
(P2.6
×
5)
6
belt
7
belt
4
two screws
(PTT2
×
4)
9
motor assy (W)
(M901)
DECK A
DECK B
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 8 –
SECTION 3
DIAL POINTER SETTING
cabinet (front)
cabinet (front)
A
B
C
pointer
marked line
1
Set the pointer into the grooves of the cabinet
(front) in the order of
A
,
B
and
c
.
2
Turn the knob (tune) in the direction of the arrow.
3
Set the pointer by aligning it with th
e
marked line of the cabinet (front).
cabinet (front)
4
Turn the gear (VC) fully counterclockwise.
5
Turn the "gear, midway" fully clockwise.
6
TUNER board
8
chassis (tune)
7
three screws
(P3
×
8)
9
screw
(BTP3
×
10)
9
screw
(BTP3
×
10)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 9 –
TAPE DECK SECTION 0 dB=0.775 V
1. The adjustments should be performed in the order given in the
service manual. (As a general rule. Playback circuit adjust-
ment should be completed before performing recording cir-
cuit adjustment.)
2. The adjustments should be performed for both L-ch and R-ch
unless otherwise indicated.
• Switch and control position
FUNCTION switch............................. TAPE (RADIO OFF)
BALANCE control ............................. center click
MEGA BASS control ......................... mechanical center
BALANCE control ............................. center click
PRESET MODE switch...................... MANUAL
VOLUME control ............................... maximum
Standard Output Level
TestTape
Tape Speed Adjustment
Procedure:
Mode: FWD/REV playback (DECKA)
FWD playback (DECK B)
1. Set playback mode (normal speed).
2. Make sure that the value indicated on the frequency counter
falls into the specification.
3. If out of specification, adjust RV303 so that the value on the
frequency counter becomes 3 kHz.
Specifications: 2,985 to 3,015 Hz
4. Adjust so that the frequency at the beginning and that at the
end of tape winding are between 2,970 and 3,030 Hz.
5. Set high speed dubbing mode.
6. Confirm so that the value on the frequency counter is between
5,300 and 6,300 Hz.
7. Confirm frequency difference the beginning and the end of
the tape should be within 1%.
Adjustment Location: MAIN board (See page 11)
SECTION 5
ELECTRICAL ADJUSTMENTS
SP Out Phones
Load impedance 6 Ω32 Ω
Output level 0.775 V (0 dB) 0.25 V (–10 dB)
Type Signal Used for
WS-48B 3 kHz, 0 dB Tape speed adjustment
+
–
set
32
Ω
frequency
counter
PHONES jack (J301)
test tape
WS-48B
(3kHz, 0 dB)
DECK-A DECK-B
SECTION 4
MECHANICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch rollers
playback head rubber belts
erase head idlers
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. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
TapeTension Measurement
DECK A DECK B
Mode Torque Meter Meter Reading
Playback CQ-102C 30 – 75 g•cm
(0.42 – 1.04 oz•inch)
Back tension CQ-102C 1.5 – 6.0 g•cm
(0.021 – 0.083 oz•inch)
Rewind Deck-A: More than 60 g•cm
CQ-201B (More than 0.84 oz•inch)
Fast forward Deck B: More than 50 g•cm
(More than 0.70 oz•inch)
Tension Meter Meter Reading
CQ-403A Deck-A: More than 90 g (3.18 oz)
Deck-B: More than 100 g (3.53 oz)
DECK A DECK B
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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– 10 –
TUNER SECTION 0 dB=1 µV
[FM]
Setting:
FUNCTION switch : RADIO
BAND switch : FM
[MW]
Setting:
FUNCTION switch : RADIO
BAND switch : MW
[SW]
Setting:
FUNCTION switch : RADIO
BAND switch : SW1/SW2
FINE TUNING knob ...................................... mechanical center
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
( ): Saudi Arabia model
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 (L21) 86.5 MHz (87.35 MHz)
CT2 109.5 MHz (107.8 MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.5 MHz (87.35 MHz)
CT1 109.5 MHz (107.8 MHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520 kHz (516 kHz)
CT4 1,680 kHz (1,630 kHz)
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 600 kHz
CT3 1,400 kHz
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 2.2 MHz
CT6 7.3 MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 2.2 MHz
CT5 7.3 MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8 6.8 MHz
CT8 22.5 MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7 6.8 MHz
CT7 22.5 MHz
FM VCO Adjustment
Setting:
Procedure:
1. Connect the frequency counter to pin 4and7of IC1 as shown
the figure below.
2. Tune the set to 98 MHz.
3. Adjust RV1 for 76 kHz reading on the frequency counter.
Specifications: 75.95 kHz to 76.05 kHz.
Adjustment Location: TUNER board (See page 11)
Put the lead-wire
antenna close to
the set.
AM RF SSG
30% amplitude modulation by
400 Hz signal
output level: as low as possible
FM RF SSG
0.01
µ
FTUNER board
CNP1
22.5 kHz frequency deviation
by 400 Hz signal.
output level: as low as possible
AM RF SSG
12 pF
30% amplitude modulation by
400 Hz signal
output level: as low as possible
TUNER board
CNP1
+
–
set
32
Ω
PHONES jack (J301
)
level meter
0.001
µ
F
FM RF SSG
Carrier frequency :98 MHz
Modulation : no modultion
Output level : 0.1 V (100 dB)
TUNER board
CNP1
+
–
TUNER board
IC1 pin
4
+
IC1 pin
7
1
µ
F
33 k
Ω
frequency counter
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 10.7 MHz
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 11 –
IC201
RV303 : Tape Speed Adjustment
[ MAIN BOARD ]
(Component side)
IC1
14
7
SW1 Frequency
Coverage
Adjustment
CNP1
FM/SW telescopic
antenna terminal
L3: MW Tracking Adjustment
L6
CT6
SW2 Frequency
Coverage
Adjustment
L8
CT8
MW Frequency
Coverage
Adjustment
L4
CT4
SW1 Tracking
Adjustment
L5
CT5
SW2 Tracking
Adjustment
L7
CT7
CT3: MW Tracking Adjustment
T1: AM IF Adjustment
*
) L2 : Except Saudi Arabia model
L21: Saudi Arabia model
FM Tracking
Adjustment L1
CT1
FM Frequency
Coverage Adjustment CT2
L2/L21
*
T2: FM IF Adjustment
RV1: FM VCO Adjustment
[ TUNER BOARD ]
(Component side)
Adjustment Location:
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 13 – – 14 –
CFS-616S SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – TUNER Section –
18
20
16 13
19
24 22
FM
FRONT-END
FM IF/
DISCRI
DECORDER
AMP
SWITCH
1/2
COUNTER
1/2
COUNTER
AM IF/
DET
PD1
VCO
PD2
AM
FRONT-END
FINE TUNIG
CONTROL
Q1
BAND
SELECTOR
Q2
14
FM RF
IN
FM/AM
FE OUT CF1, 2
CF3
FM
RF
26
FM
DISCRI
FM
IF IN
6
5
L-CH
OUT
R-CH
OUT R-CH
TUNER L-CH
4
2729123
ST IND
AM
IF IN
PILOT DET
LPF2
15
BAND
SELECT
PILOT DET
LPF2
PLL
LPF1
PLL
LPF2
VCO
AM OSC
CT4
L4
MW OSC
VREF
VREF
L3
MW
FERRITE-ROD
ANTENNA
ANT1
FM/SW
TELESCOPIC
ANTENNA
L8
SW2 OSC
L6
SW1 OSC
CV4
VR1
FM OSC
AM RF
IN
L2 (Except Saudi Arabia model)
L21 (Saudi Arabia model)
FM OSC
L1
FM RF
FM/AM FRONT-END,
FM/AM DET, MPX
IC1
CV3
CT3
L7
SW2
ANT CT7
L5
SW1
ANT CT5
CT1
CT8
CT6
S1 (7/8)
S1 (8/8)
S1 (6/8)
S1 (2/8)
S1 (3/8)
S1 (4/8)
S1 (1/8)
CV1
CT2
CV2
FINE TUNING
CV1 – CV4
TUNING
CV1 – CV4
TUNING
MW
SW2
SW1
FM
S1
BAND
MW
SW2
SW1
FM
S1
BAND
MW
SW2
SW1
FM
S1
BAND
MW
SW2
SW1
FM
S1
BAND
+
RV1
FM VCO
CT8, L8
SW2 FREQUENCY
COVERAGE
CT6, L6
SW1 FREQUENCY
COVERAGE
CT2, L2
CT2, L21
FM FREQUENCY
COVERAGE
CT4, L4
MW FREQUENCY
COVERAGE
CT3, L3
MW
TRACKING
CT7, L7
SW2 TRACKING
CT1, L1
FM TRACKING
T1
AM IF
T2
FM IF
CT5, L5
SW1 TRACKING
L.P.F.
B.P.F.
B.P.F.
+
AUDIO B+
D3
S1 (5/8)
A
MUTING B(Page 15)
(Page 15)
• SIGNAL PATH
: FM/SW
: MW
05
R-ch: Same as L-ch.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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CFS-616S
– 15 – – 16 – – 17 –
6-2. BLOCK DIAGRAM – MAIN Section –
1
919 171012
32
2
29
30
3
27 28
14
15
R-CH
S302
(2/4)
S302
(4/4)
REC BIAS OSC
IC301 (2/2)
BIAS B+
BIAS
B+
BIAS B+
AUDIO B+
AUDIO B+
BIAS B+
BIAS OSC
TR C
BIAS
OSC
TR B
T301
BIAS OSC
DECK B
HE901
(ERASE)
R-CH R-CH
L-CH
R-CH
L-CH
DECK A
HRP901
(REC/PB)
HP901
(PB)
A-L
TUNER
IN L
LINE IN L
MIC
IN
BIAS
B+
7
NOR/HS
B-L
31 B-R
PB NF L
PB EQ L
FUNC
MODE
R-CH
R-CH
D416 – 420
AUDIO
B+
BATT B+
POWER AMP
(IC101, 201) B+
DRY BATTERY
SIZE ‘‘D’’
(IEC DESIGNATION R20)
6PCS. 9V
D401 – 415
OUT L IN1 OUT1
OUT2
IN
POWER AMP
IC201 (2/2)
GRAPHIC EQUALIZER AMP
IC302
REC/PB EQ AMP,
FUNCTION SWITCH,
AGC
IC301 (1/2)
OUT
SW
VOL
IN2
15dB
15dB
OUT R
17
6
4
10
13
S302
(REC/PB)
REC
PB
S302 (3/4)
(REC/PB)
REC
PB
S302 (1/4)
(REC/PB)
REC
PB
S503
(DECK B PLAY)
RV302
PB EQ
AMP
INPUT
SELECT
SWITCH
REC
EQ AMP
EQ
EQ AMP
Q402
DSS
SWITCHING
Q401
CAPSTAN/REEL
MOTOR DRIVE
Q304, 306
NORMAL/HIGH
SPEED SWITCHING
Q303
MOTOR CONTROL
SWITCH
Q307
MUTING
Q101
MUTING
Q201
MUTING
CONTROL SWITCH
Q302, 305
AGC
CIRCUIT
MIC
AMP
POWER
AMP
GRAPHIC
EQUALIZER
AMP
CONTROL
8
SW
8
10 5
IN
POWER AMP
IC101 (2/2)
OUT
POWER
AMP
10 5
IN
HEADPHONE AMP
IC101 (12)
OUT
HEADPHONE
AMP
12 3
IN
HEADPHONE AMP
IC201 (12)
OUT
HEADPHONE
AMP
12 3
REGULATOR
Q301
AUDIO B+
LOGIC
TUNER L-CH
A
MOTOR B+
(Page 14)
MUTING
05 R-ch: Same as L-ch.
B
(Page 14)
ECM301
MIC
S303
ISS
5 BAND GRAPHIC
EQUALIZER
3
2
1
S401 (1/2)
PRESET MODE
S401 (2/2)
PRESET
MODE
MANUAL
DISCO
PARTY
LIVE
MANUAL
DISCO
PARTY
LIVE
S301 (2/2)
FUNCTION
BALANCE
RV301
VOLUME
VOLUME
VOLUME
RV303
TAPE SPEED
(NORMAL)
RADIO
HIGH
NORM
DUBBING
TAPE/RADIO OFF
RADIO
HIGH
NORM
DUBBING
TAPE/RADIO OFF
S301 (1/2)
FUNCTION
D301
OPR/BATT
S504
(DECK A PLAY)
S502
(DECK A POWER)
F902
T901
POWER
TRANSFORMER
S501
(DECK B POWER)
S505
(MOTOR DIRECTION)
DECK B
1 – 3, 20 – 22
D305
SP101
(WOOFER)
J301
2
(PHONES)
L-CH
R-CH
SP102
(TWEETER)
SP202
(TWEETER)
SP201
(WOOFER)
J302
SPEAKER
IMPEDANCE 6Ω
M
A
MOTOR B+
BATT B+
M901
(CAPSTAN/REEL) B
D303
D304
RECT
D901 – 904
VOLTAGE
SELECTOR
S901
J901
AC IN
• SIGNAL PATH
: TUNER
: TAPE PLAY (DECK A)
: TAPE PLAY (DECK B)
: TAPE REC (DECK B)
: MIC INPUT
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
CFS-616S
– 18 – – 19 – – 20 –
6-3. PRINTED WIRING BOARD – TUNER Section – • See page 18 for Circuit Boards Location.
• Circuit Boards Location • Semiconductor
Location
Ref. No. Location
D1 E-2
D2 E-2
D3 D-2
IC1 D-4
Q1 C-3
Q2 D-4
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•¢: internal component.
•b: Pattern from the side which enables seeing.
•Abbreviation
EA: Saudi Arabia model.
POWER (A) board
POWER (B) board
BATT (+) board
BATT (–) board
TUNER board
REC SW board
MAIN board
VOL board
ECM board
TRANSLATION (HEAD) board
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
CFS-616S
– 21 – – 22 – – 23 –
6-4. SCHEMATIC DIAGRAM –TUNER Section –
Note on Schematic Diagram:
• All capacitors are in µF unless 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.
•¢: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
( ) : MW
< > : SW
• Voltages are taken withaVOM(Input impedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM/SW
f: MW
• Abbreviation
EA:Saudi Arabia model.
VCO
REGULATOR
FM FRONT-END
AM FRONT-END
MPX
REGULATOR
MONO/STEREO
SELECT
DECORD
AMP
MUTING
AUTO
BLEND
TUNING
INDICATOR
AM IF/
DET
FM IF/
DISCRI
RIPPLE
FILTER
BAND-PASS
MUTE
1
27
28
2930 242526 212223 181920 1617
2 3 4 5 6 7 8 9
PLL LPF1
PILOT DET LPF2
PILOT DET LPF2
ST IND/VCO CHECK
L-CH OUT
VCC
R-CH OUT
RIPPLE FILTER
AGC AFC1
10
AGC AFC2
13
FM IF IN
14
AM IF IN
15
BAND SELECT
11
GND
12
TUNE IND
1/2
COUNTER
1/2
COUNTER
PD1
PD2
FM/AM FE OUT
FM GND
FM RF IN
AM RF IN
FM RF
REG
FM OSC
AFC
AM OSC
MUTE
FM DISCRI
GND
PLL LPF2
MPX REG
VCO
• IC Block Diagram
IC1 CXA1238S
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
CFS-616S
– 24 – – 25 – – 26 –
6-5. PRINTED WIRING BOARDS – MAIN Section – • See page 18 for Circuit Boards Location.
D419 H-10
D420 H-10
D901 J-2
D902 J-2
D903 J-2
D904 J-2
IC101 F-7
IC201 D-7
IC301 E-10
IC302 G-10
Q101 G-11
Q201 F-10
Q301 G-7
Q302 H-9
Q303 C-8
Q304 C-8
Q305 F-11
Q306 D-8
Q307 G-9
Q401 H-11
Q402 H-11
Ref. No. LocationRef. No. Location
D301 H-7
D302 G-8
D303 G-8
D304 D-8
D305 G-8
D306 G-7
D401 G-11
D402 G-12
D403 G-12
D404 F-11
D405 G-12
D406 F-12
D407 F-11
D408 G-12
D409 F-12
D410 F-11
D411 G-12
D412 F-12
D413 F-11
D414 G-12
D415 F-12
D416 H-10
D417 H-10
D418 H-10
• Semiconductor Location
Note on PrintedWiring Board:
•X:parts extracted from the component side.
•Y:parts extracted from the conductor side.
•b:Pattern from the side which enables seeing.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
CFS-616S
– 27 – – 28 – – 29 – – 30 –
6-6. SCHEMATIC DIAGRAM – MAIN Section – • See page 31 for IC Block Diagrams.
Note on Schematic Diagram:
• All capacitors are in µF unless 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.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :TAPE PLAY
( ) : TAPE REC
• Voltages are taken withaVOM(Input impedance 10MΩ).
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.
• Signal path.
F: TUNER
E: TAPE PLAY (DECK A)
d: TAPE PLAY (DECK B)
G: TAPE REC (DECK B)
N: MIC INPUT
Note: The components identified by mark !or dotted line
with mark !are critical for safety.
Replace only with part number specified.
• Waveforms
– MAIN Board –
1T301 (REC mode)
10V/DIV, 5 µs/DIV
2T301 (REC mode)
1V/DIV, 5 µs/DIV
45.2 Vp-p
14.4
µ
s
4.8 Vp-p
14.4
µ
s
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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