Sony CFS-1085S Service Manual ▷ View online
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)
1
Turn the PVC shaft fully counterclokwise.
2
Place the pointer in the chassis groove.
3
Line up the tip of the pointer with the notch in the chassis.
(Fig-1)
4
Attach so that the knob (Tune) is at the position shown in
Fig-2.
5
Fasten 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
SOUND SELECT.................... FLAT
VOLUME................................. mechanical center
MEGA BASS............................ OFF
Test Tape
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.)
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power sup-
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. Tape Tension 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
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)
tape should be within 1% (30Hz)
Adjustment Values :
tape speed adjustment
control inside motor
control inside motor
set
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
32
Ω
digital frequency
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
generator
30% amplitude modulation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
12PF
Adjustment Location : Mechanism deck
z
Switch location
FUNCTION switch................ TAPE (RADIO OFF)
SOUND SELECT.................. FLAT
VOLUME.............................. mechanical center
MEGA BASS......................... OFF
SOUND SELECT.................. FLAT
VOLUME.............................. mechanical center
MEGA BASS......................... OFF
TUNER SECTION
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
set
32
Ω
J301 (phones)
level meter
FM RF signal
generator
generator
22.5kHz frequency deviation by
1kHz signal.
Output level : as low as possible
1kHz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
• 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.
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