Sony CFS-1085S Service Manual ▷ View online
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)
(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)
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
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