Sony CFS-1085-S Mk2 Service manual
CFS-1085SMK2
SERVICE MANUAL
Ver 1.0 2004. 03
Model Name Using Similar Mechanism CFS-1085S
Tape Transport Mechanism Type MF-1055-117
SPECIFICATIONS
E Model
• Frequency range
FM: Saudi Arabia: 87.5–107 MHz/
Other countries: 87.5–108 MHz
MW: Saudi Arabia: 530–1 605 kHz/
Other countries: 530-1 611 kHz/
SW1: 2.3–7 MHz/SW2: 7–22 MHz
• IF FM: 10.7 MHz,
MW/SW: 455 kHz
• Antennas FM/SW: Telescope/ MW: Built-in ferrite bar
• Recording system 4-track, 2-channel stereo
• Frequency response 80–10 000Hz
• Speakers Woofer: 10 cm (4 inches) dia., 6 Ω,
cone type/Tweeter: 2 cm (13⁄16 inch) dia.
• Input CD/TV LINE IN jacks (phono jacks),
sensitivity 0.436 V,
input impedance 47 kΩ
• Output Headphones jack (stereo minijack),
for 6–32 Ω impedance headphones
• Maximum Power output
10 W
• Battery life
FM Recording: Sony R20P: Approx.
5 hours/Sony LR20 alkaline: Approx. 10 hours
Playback: Sony R20P: Approx. 1.5 hours/Sony LR20 alkaline:
Approx. 3 hours
• Power requirements
110–127V/220–240 V AC selectable, 50/60 Hz
9V DC, six R20 (size D) batteries
DC IN 12V jack
• Power consumption
AC 14 W
• Dimensions Approx. 579 x 206 x 197 mm (w/h/d)
(22 7⁄8 x 8 1⁄8 x 7 7⁄8 inches) incl. projecting parts and controls,
not incl. handle
• Mass Approx. 4.6 kg (10 lb 2 oz) incl. batteries
• Supplied accessory
AC power cord (1)
Design and specifications are subject to change without notice.
9-877-704-01
2004C02-1
© 2004.03
RADIO CASETTE-CORDER
Sony Corporation
Presonal Audio Company
Published by Sony Engineering Corporation
CFS-1085SMK2
TABLE OF CONTENTS
1. GENERAL ................................................................... 3
2. DISASSEMBLY
2-1. Disassembly Flow ...........................................................4
2-2. Power Board, DC IN Board ............................................ 4
2-3. LED Board, GE SW Board, MEGA BASS SW Board ... 5
2-4. MAIN Board, MIC Board, VOL Board ..........................5
2-5. Mechanism Deck, Tuner Board....................................... 6
2-6. Record/Playback Head (HRP101), Erase Head (HE301),
Belt, Motor (M601) ..........................................................6
2-7. Dial Pointer Installation................................................... 7
3. ADJUSTMENT ................................................................ 8
4. DIAGRAMS
4-1. Circuit Boards Location ..................................................12
4-2. Block diagrams................................................................ 13
4-3. Printed Wiring Board – Main Section – .......................... 14
4-4. Schematic Diagram – Main Section – ............................. 15
4-5. Schematic Diagram – Power Section – ........................... 16
4-6. Printed Wiring Board – Tuner Section – .........................16
4-7. Schematic Diagram – Tuner Section –............................ 17
4-8. IC Block Diagrams .......................................................... 18
5. EXPLODED VIEWS
5-1. Rear Cabinet Section ....................................................... 19
5-2. Front Panel Section ......................................................... 20
5-3. Speaker Section ............................................................... 21
5-4. Mechanism Deck Section (1) (MF-1055-117) ................ 22
5-5. Mechanism Deck Section (2) (MF-1055-117) ................ 23
6. ELECTRICAL PARTS LIST........................................ 24
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DO TTED LINE WITH
MARK 0 ON THE SCHEMATIC DIA GRAMS 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
PUBLISHED BY SONY .
2
LOCA TING THE CONTROLS
SECTION 1
GENERAL
Location of controls
CFS-1085SMK2
This section is extracted
from instruction manual.
PHONES
OPR/
BATT
FUNCTION
BAND FINE TUNING
CD/TV
LINE IN
VOLUME
SOUND SELECT
TUNINGFM STEREO
MAXI BASS
MIC
DC IN 12V
(rear)
VOLTAGE
SELECTOR
(rear)
3
CFS-1085SMK2
)
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
SECTION 2
DISASSEMBLY
CABINET (REAR)
CABINET (FRONT)
2-2. POWER BOARD,
DC IN BOARD
(Page 4)
Note: Follow the disassembly procedure in the numerical order given.
2-3. LED BOARD,
GE SW BOARD,
MEGA BASS SW BOARD
(Page 5)
2-4. MAIN BOARD,
MIC BOARD,
VOL BOARD
(Page 7)
2-5. MECHANISM DECK,
TUNER BOARD
(Page 6)
2-6. RECORD/PLAYBACK HEAD (HRP101),
ERASE HEAD (HE301),
BELT, MOTOR (M601)
(Page 6)
2-2. POWER BOARD, DC IN BOARD
tuner board
4
(CNP1)
DC IN board
8
two screws (2.6X10)
7
2
3
main board
(CNP305)
6
power board
two screws (3X4)
1
cabinet (rear)
two screws (3X4
1
cabinet (front)
4
three screws (3X10)
5
2-3. LED BOARD, GE SW BOARD, MEGA BASS SW BOARD
)
)
screw (2.6X8)
1
CFS-1085SMK2
knob (job)
5
cabinet (front)
LED board
2
7
4
bracket (B) board
screws (2.6X8)
1
bracket (B) board
two screws (2.6X8
3
GE SW board
two screws (2.6X8)
6
mega bass SW board
2-4. MAIN BOARD, MIC BOARD, VOL BOARD
screw (2.6X8)
1
2
two claws
6
lever (rec)
qd
CNP308
8
qg
7
CNP303
9
MIC board
VOL board
CNP305
0
CN304
qa
two screws (2.6X8)
qf
CNP301
qs
4
bracket (B) board
main board
two screws (2.6X8
3
screw (2.6X8)
5
knob (VOL)
cabinet (front)
5
CFS-1085SMK2
)
2-5. MECHANISM DECK, TUNER BOARD
four screws (2.6X8)
5
two screws (2.6X8)
3
screw (3X8)
0
pointer chassis
6
4
mechanism deck
two screws (2.6X8)
3
pointer
2
9
8
qa
tuner board
chassis
knob (tun)
screw (2.6X5)
7
two screws (2.6X8
1
cabinet (front)
2-6. RECORD/PLAYBACK HEAD (HRP101), ERASE HEAD (HE301), BELT, MOTOR (M601)
two claws
1
6
7
record / playback head
(HRP101)
2
4
two claws
3
belt
motor
(M601)
two screws (2.6X5)
5
erase head
(HE301)
6
2-7. DIAL POINTER INSTALLATION
CFS-1085SMK2
4
(fig-2)
MIN
pointer
knob (tune)
window
chassis
2
screw (2.6X5)
5
MIN
knob (tune)
3
pointer
notch
(fig-1)
tuner board
PVC shaft
1
chassis
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.
7
CFS-1085SMK2
SECTION 3
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
demagnetizer. (Do not bring the head demagnetizer close to
the erase head.)
3. The adjustments should be performed with the rated power
supply 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)
3-2. ELECTRICAL ADJUSTMENTS
TAPE SECTION
• Switch location
FUNCTION switch................. TAPE (RADIO OFF)
SOUND SELECT.................... FLAT
VOLUME................................. mechanical center
MEGA BASS............................ OFF
0dB = 0.775 V
Test T ape
Type Signal Used for
WS-48B 3kHz, 0dB Tape Speed Adjustment
2. T ape T ension Measurement
Mode Torque Meter Meter Reading
FWD CQ-403A more than 100g (3.53 oz)
8
Tape Speed Adjustment
y
Procedure :
Mode : playback
CFS-1085SMK2
test tape
WS-48B
(3kHz, 0dB)
set
digital frequenc
32
Ω
phones jack
counter
Adjustment V alues :
Digital frequencycounter
2,910 to 3,090Hz
Frequency difference between the begining and the end of the
tape should be within 1% (30Hz)
Adjustment V alues :
tape speed adjustment
control inside motor
9
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