Sony CFS-1085-S Service manual

CFS-1085S

SERVICE MANUAL

Ver 1.0 2001.10

Model Name Using Similar Mechanism CFS-1065S Tape Transport Mechanism Type MF-1055-117

SPECIFICATIONS

• 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

E Model

• 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

110–120V/220–240 V AC selectable, 50/60 Hz 9V DC, six R20 (size D) batteries

• 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.

9-873-310-01

RADIO CASSETTE-CORDER

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

CFS-1085S

TABLE OF CONTENTS

1. GENERAL .......................................................................... 3

2. DISASSEMBLY

2-1. Power Board ......................................................................... 4

2-2. LED Board, GE SW Board, MEGA BASS Board................ 5

2-3. MAIN Board, MIC Board, VOL Board................................ 5

2-4. Mechanism Deck, Tuner Board ............................................ 6

2-5. Record/Playback Head (HRP101), Erase Head (HE301),

Belt, Motor (M601) ............................................................. 6

2-6. 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 – Tuner Section –................................ 16

4-6. Printed Wiring Board – Tuner Section – ............................. 17

4-7. IC Block Diagrams ...........................................................18

5. EXPLODED VIEWS

5-1. Rear Cabinet Section........................................................... 20

5-2. Front Panel Section ............................................................. 21

5-3. Speaker Section................................................................... 22

5-4. Mechanism Deck Section (1).............................................. 23

5-5. Mechanism Deck Section (2).............................................. 24

6. ELECTRICAL PARTS LIST .................................25

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 MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SECTION 1

GENERAL

Location of controls

CFS-1085S

This section is extracted from instruction manual.

OPR/ BATT

PHONES

FUNCTION

BAND FINE TUNING

FM STEREO

CD/TV LINE IN

VOLUME

SOUND SELECT

TUNING

MAXI BASS

MIC

CFS-1085S

)

Note: Disassemble the unit in the order as shown below.

SECTION 2

DISASSEMBLY

Cabinet (rear)

Power board

Set

Cabinet (front)

LED board, GE SW board, Mega bass SW board Main board, MIC board, VOL board Mechanism deck, Tuner board

Note: Follow the disassembly procedure in the numerical order given.

2-1. POWER BOARD

Tuner board

(CNP1)

Record/playback head (HRP101), Erase head (HE301), Belt, Motor (M601)

Screws (3X4)

Cabinet (front)

Main board

(CNP305)

Screws (3X10)

Power board

Cabinet (rear)

Screws (3X4

2-2. LED BOARD, GE SW BOARD, MEGA BASS SW BOARD

Screw (2.6X8)

CFS-1085S

Knob (job)

Cabinet (front)

LED board

Bracket (B) board

Screw (2.6X8)

Bracket (B) board

Screws (2.6X8)

GE SW board

Screws (2.6X8)

Mega bass SW board

2-3. MAIN BOARD, MIC BOARD, VOL BOARD

Screw (2.6X8)

Lever (rec)

Claws

CNP306

CNP303

MIC board

VOL board

CNP302

CNP304

CNP301

Main board

Screws (2.6X8)

Bracket (B) board

Screw (2.6X8)

Knob (VOL)

Cabinet (front)

CFS-1085S

)

2-4. MECHANISM DECK, TUNER BOARD

Screws (2.6X8)

Pointer chassis

Screws (2.6X8)

Mechanism deck

Screws (2.6X8)

Screw (3X8)

Tuner board

Pointer

Cabinet (front)

Chassis

Knob (tun)

Screw (2.6X5)

2-5. RECORD/PLAYBACK HEAD (HRP101), ERASE HEAD (HE301), BELT, MOTOR (M601)

Screws (2.6X8

Claws

Motor (M601)

Record / playback head

(HRP101)

Screws (2.6X5)

Erase head

(HE301)

Belt

Claws

2-6. DIAL POINTER INSTALLATION

CFS-1085S

Knob (tune)

MIN

(Fig-2)

Pointer

Window

Chassis

Screw (2.6X5)

MIN

Knob (tune)

Pointer

Notch

(Fig-1)

Tuner board

PVC shaft

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 (T une) is at the position shown in Fig-2. 5 Fasten the knob (tune) to the PVC shaft with the screw.

CFS-1085S

SECTION 3

ADJUSTMENTS

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. Do not use a magnetized screwdriver for the adjustments.

4. The adjustments should be performed with the rated power supply voltage (9V) unless otherwise noted.

1.Torque Measurement

Mode T orque 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)

Rewind Fast Forward

CQ-201B (55 – 135 g•cm)

5.4 – 13.2 mN•m

(0.77 – 1.87 oz•inch)

3-2. ELECTRICAL ADJUSTMENTS TAPE SECTION

z 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)

Tape Speed Adjustment

Procedure :

Mode : playback

CFS-1085S

test tape WS-48B (3kHz, 0dB)

set

digital frequenc

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

CFS-1085S

Adjustment Location : Mechanism deck

TUNER SECTION

z Switch location

FUNCTION switch................ TAPE (RADIO OFF)

SOUND SELECT.................. FLAT

VOLUME.............................. mechanical center

MEGA BASS......................... OFF

TUNER SECTION

MW Section

Procedure :

BAND Switch : MIN FINE TUNE control : mechanical center

AM RF signal generator

30% amplitude modulation by 400Hz signal. Output level : as low as possible

SW Section

Procedure :

BAND Switch : SW1, SW2 FINE TUNE control : mechanical center

AM RF signal generator

30% amplitude modulation by 400Hz signal. Output level : as low as possible

Put the lead-wire antenna close to the set.

12PF

telescopi antenna terminal

( ) : 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 Section

Procedure :

BAND Switch : FM FINE TUNE control : mechanical center

FM RF signal generator

0.01µF

22.5kHz frequency deviation by 1kHz signal. Output level : as low as possible

level mete

32Ω

set

J301 (phones)

telescopi antenna terminal

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

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)

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