Sony CFS-616S Service Manual ▷ View online
– 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
(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 the
marked line of the cabinet (front).
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
(P3
×
8)
9
screw
(BTP3
(BTP3
×
10)
9
screw
(BTP3
(BTP3
×
10)
– 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.)
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
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
Test Tape
Tape Speed Adjustment
Procedure:
Mode: FWD/REV playback (DECK A)
Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
1. Set playback mode (normal speed).
2. Make sure that the value indicated on the frequency counter
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
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
Ω
32
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
counter
PHONES jack (J301)
test tape
WS-48B
(3kHz, 0 dB)
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)
head)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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
Tape Tension 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
– 10 –
TUNER SECTION
0 dB=1 µV
[FM]
Setting:
FUNCTION switch : RADIO
BAND switch : FM
FUNCTION switch : RADIO
BAND switch : FM
[MW]
Setting:
FUNCTION switch : RADIO
BAND switch : MW
FUNCTION switch : RADIO
BAND switch : MW
[SW]
Setting:
FUNCTION switch : RADIO
BAND switch : SW1/SW2
FINE TUNING knob ...................................... mechanical center
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.
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 4 and 7 of IC1 as shown
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.
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.
antenna close to
the set.
AM RF SSG
30% amplitude modulation by
400 Hz signal
output level: as low as possible
400 Hz signal
output level: as low as possible
FM RF SSG
0.01
µ
F
TUNER board
CNP1
22.5 kHz frequency deviation
by 400 Hz signal.
output level: as low as possible
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
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
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
– 11 –
IC201
RV303 : Tape Speed Adjustment
[ MAIN BOARD ]
(Component side)
(Component side)
IC1
1
4
7
7
SW1 Frequency
Coverage
Adjustment
Coverage
Adjustment
CNP1
FM/SW telescopic
antenna terminal
FM/SW telescopic
antenna terminal
L3: MW Tracking Adjustment
L6
CT6
SW2 Frequency
Coverage
Adjustment
Coverage
Adjustment
L8
CT8
MW Frequency
Coverage
Adjustment
Coverage
Adjustment
L4
CT4
SW1 Tracking
Adjustment
Adjustment
L5
CT5
SW2 Tracking
Adjustment
Adjustment
L7
CT7
CT3: MW Tracking Adjustment
T1: AM IF Adjustment
*
) L2 : Except Saudi Arabia model
L21: Saudi Arabia model
FM Tracking
Adjustment
Adjustment
L1
CT1
FM Frequency
Coverage Adjustment
Coverage Adjustment
CT2
L2/L21
*
T2: FM IF Adjustment
RV1: FM VCO Adjustment
[ TUNER BOARD ]
(Component side)
(Component side)
Adjustment Location:
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