Sony CFS-616S Service Manual
CFS-616S
SERVICE MANUAL
Ver 1.0 1999. 01
SPECIFICATIONS
E Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MF-W616-148
MICROFILM
RADIO CASSETTE-CORDER
TABLE OF CONTENTS
2
1. GENERAL ................................................................. 3
2. DISASSEMBLY ......................................................... 4
3. DIAL POINTER SETTING..................................... 8
4. MECHANICAL ADJUSTMENTS ....................... 9
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 filter s 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.
Mark Center frequency
red 10.70 MHz
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
mark
CF1,
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
LOCATION OF CONTROLS
• Front view
6
5
4
3
2
1
7
SECTION 1
GENERAL
89
!£0!¡!™
!¢
!∞
1 Cassette compartments
2 DIRECTION switch
3 DIR MODE switch
4 MIC (microphone)
5 2 (PHONES (headphones)) jack (stereo mini-jack)
6 VOLUME knob
7 OPR/BATT (operation/battery) indicators
8 FUNCTION selector
9 BALANCE control
0 5 BAND GRAPHIC EQUALIZER controls
!¡ PRESET MODE selector
• REAR view
RADIO
DUBBING HIGH
DUBBING NORM
TAPE/RADIO OFF
!™ BAND selector
FM
SW1
SW2
MW
!£ TUNING knob
!¢ FINE TUNING knob
!∞ Tape operating buttons
r REC (record) button : Deck B only
( PLAY (playback) button
0 REW (rewind) button
) FF (fast-forward) button
p6 STOP/EJECT button
P PAUSE button
1234
56
78
1 LOCK tab (right side)
2 ISS switch
3 Telescopic aerial
4 SPEAKER terminals
5 LOCK tab (Left side)
6 VOLTAGE selector
7 ⁄AC IN (AC power input) socket
8 Battery compartment
– 3 –
• This set can be disassembled in the order shown below.
n
SECTION 2
DISASSEMBLY
SET
Note: Follow the disassembly procedure in the numerical order given.
CABINET (REAR)SECTION
BATT (–/+) BOARD
VOL/MAIN BOARD
TUNER BOARD
MECHANISM DECK SECTION (MF-W616-148),
REC SW BOARD
CABINET (REAR) SECTION
3
connector
(CNP307)
POWER (A/B) BOARD
1
three screws
(BTP3
×
16)
1
BELT, MOTOR
ASSY(W)(M901)
three screws
×
16)
(BTP3
BATT (–/+) BOARD
6
Remove the solder of lead.
5
BATT (+) board
3
connector
(CNP1)
cabinet (front) section
2
cabinet (rear) section
4
claw
cabinet (rear) sectio
3
BATT (-) board
2
two screws
(BTP3
×
10)
– 4 –
1
Remove the solder of lead.
POWER (A/B) BOARD
n
5
POWER (A/B) board
1
two screws
(BTP3
2
3
×
10)
bracket (AC)
six screws
(BTP3
×
10)
4
plate (T), shield
cabinet (rear) sectio
VOL/MAIN BOARD
1
knob (VOL)
3
two claws
7
MAIN board
2
two screws
(BTP3
4
VOL board
×
10)
5
screw
(BTP3
×
6
10)
claw
– 5 –
TUNER BOARD
1
knob (F. T)
TUNER board
5
two claws
7
TUNER board
2
screw
(BTP3
×
10)
3
chassis (tune)
6
2
screw
(BTP3
two claws
×
10)
4
three screws
(P3
MECHANISM DECK SECTION (MF-W616-148),
REC SW BOARD
6
DIR chassis section
cabinet (front) section
1
three connectors
(CNP304, 305, 306)
×
8)
4
three screws
(BTP3
×
10)
4
two screws
(BTP3
×
10)
7
screw
(BTP3
8
REC SW board
×
10)
3
Open the "lid (L), cassette".
2
Push the "button (ST/EJ1), MD".
2
Push the "button (ST/EJ2), MD".
– 6 –
3
Open the "lid (R), cassette".
4
two screws
(BTP3
5
mechanism deck section
(MF-W616-148)
×
10)
BELT, MOTOR ASSY (W) (M901)
6
belt
7
DECK A
DECK B
belt
8
5
Remove the chassis (joint) assy
in the direction of the arrow.
4
two screws
(PTT2
×
4)
1
Remove four solders of leads.
three motor screws
2
screw
(P2.6
4
9
motor assy (W)
(M901)
3
spring (REC)
×
5)
two screws
(PTT2
×
4)
– 7 –
SECTION 3
e
DIAL POINTER SETTING
3
Set the pointer by aligning it with th
marked line of the cabinet (front).
cabinet (front)
2
Turn the knob (tune) in the direction of the arrow.
A
cabinet (front)
C
1
Set the pointer into the grooves of the cabinet
(front) in the order of
B
pointer
marked line
A, B
and c.
cabinet (front)
9
screw
(BTP3
7
three screws
(P3
×
8)
×
10)
5
Turn the "gear, midway" fully clockwise.
4
Turn the gear (VC) fully counterclockwise.
8
chassis (tune)
9
6
TUNER board
screw
(BTP3
×
10)
– 8 –
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL 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 demagnetizer. (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
Mode Torque Meter Meter Reading
Playback CQ-102C
Back tension CQ-102C
Rewind
CQ-201B
Fast forward
DECK A DECK B
30 – 75 g•cm
(0.42 – 1.04 oz•inch)
1.5 – 6.0 g•cm
(0.021 – 0.083 oz•inch)
Deck-A: More than 60 g•cm
(More than 0.84 oz•inch)
Deck B: More than 50 g•cm
(More than 0.70 oz•inch)
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 adjustment should be completed before performing recording circuit 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
SP Out Phones
Load impedance 6 Ω 32 Ω
Output level 0.775 V (0 dB) 0.25 V (–10 dB)
Test Tape
Type Signal Used for
WS-48B 3 kHz, 0 dB Tape speed adjustment
Tape T ension Measurement
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
Tape Speed Adjustment
DECK-A DECK-B
Procedure:
Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
frequency
32
Ω
counter
+
–
test tape
WS-48B
(3kHz, 0 dB)
set
PHONES jack (J301)
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 fr equency 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)
– 9 –
TUNER SECTION 0 dB=1 µV
)
[FM]
Setting:
FUNCTION switch : RADIO
BAND switch : FM
FM RF SSG
µ
0.01
22.5 kHz frequency deviation
by 400 Hz signal.
output level: as low as possible
[MW]
Setting:
FUNCTION switch : RADIO
BAND switch : MW
AM RF SSG
30% amplitude modulation by
400 Hz signal
output level: as low as possible
Put the lead-wire
antenna close to
the set.
TUNER board
F
CNP1
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
[SW]
Setting:
FUNCTION switch : RADIO
BAND switch : SW1/SW2
FINE TUNING knob ...................................... mechanical center
AM RF SSG
TUNER board
CNP1
+
–
30% amplitude modulation by
400 Hz signal
output level: as low as possible
32
Ω
set
PHONES jack (J301
12 pF
level meter
• 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 IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 10.7 MHz
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)
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:
FM RF SSG
0.001 µF
Carrier frequency : 98 MHz
Modulation : no modultion
Output level : 0.1 V (100 dB)
TUNER board
CNP1
Procedure:
1. Connect the frequency counter to pin 4 and 7 of 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.
frequency counter
TUNER board
IC1 pin
4
IC1 pin
7
33 k
1 µF
+
Ω
+
–
Adjustment Location: TUNER board (See page 11)
– 10 –
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