Sony CFD-980 Service manual

CFD-980

SERVICE MANUAL

Ver 1.2 2000.2

With SUPPLEMENT (9-923-297-81)

SPECIFICATIONS

US Model

Canadian Model

AEP Model

Model Name Using
Similar Mechanism
Optical Pick-up Name KSM-213CAM
Tape Transport Mechanism Type MF-980-146

CD Section CFD-360/370
Tape Section CFD-360/370

CD play section

System Compact disk digital audio system
Laser diode properties Material : GaAlAs

Wavelength:780 nm
Emission duration : Continuous
Laser output : Less than 44.6 µW
(This output is the value measured at a distance
of about 200 mm from the objective lens surface
on the optical pick-up block with 7 mm
aperture.)

Spindle speed

200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels 2
Frequency response 20 – 20,000Hz + 0.5/-1dB
Wow and flutter Below measurable limit

Radio section

Frequency range US, Canadian Model

FM : 87.6 – 108 MHz

AM : 530 – 1,710 kHz

AEP Model

FM : 87.6 – 107 MHz

AM : 531 – 1,602 kHz
Aerials FM : Telescopic aerial

AM : Built-in ferrite bar aerial

Cassette-corder section

Recording system 4 -track 2 channel stereo
Fast winding time Approx. 130 s (sec.) with Sony cassette C-60
Frequency response TYPE1 (normal) : 50 – 13,000 Hz

General

Speaker Full range : 10 cm (4 in.) dia., 3.2 Ω, cone

type (2)

Output Headphones jack (stereo minijack)

For 16 – 68 Ω impedance headphones

Power output (excluding US model)

2.0W + 2.0W (at3.2 Ω, 10 % harmonic
distortion)

Power requirements For CD radio cassette-corder :

DC IN 9V jack accepts :

Supplied AC power adaptor (AC­CD 980) for use with 120 V AC,
60Hz
Supplied car battery cord (DCC-EC9)

for use with 12 V car battery
9V DC, 6 size D (R 20) batteries
For memory back-up :
6V DC, 4 size AA (R 6) batteries

Power consumption AC 20W

— Continued on next page —

MICROFILM

CD RADIO CASSETTE-CORDER

TABLE OF CONTENTS

1. SERVICE NOTES····························································3

SAFETY CHECK-OUT

2. GENERAL ··········································································4

3. DISASSEMBLY

3-1. Rear Cabinet ····································································· 11
3-2. DC Board ·········································································· 11
3-3. Battery Case / Tuner Board / Reset Board ·······················12
3-4. Cabinet Sub Assy, Front / Main Board ·····························12
3-5. Control Panel / SW Board ················································13
3-6. Power SW Board / H/P Board ··········································13
3-7. Optical pick-up (KSM-213CAM)Section / SW2 Board ··14
3-8. REC Board / Mechanism Deck (MF-980-146)Section ····14

4. ADJUSTMENTS

4-1. Mechanical Adjustment ····················································15
4-2. Electrical Adjustment ······················································· 15

5. DIAGRAMS

5-1. Circuit Boards Location ···················································22
5-2. Block Diagram –TC Section – ·········································23
5-3. Block Diagram –Tuner/CD Section – ······························25
5-4. Printed Wiring Board – Main Section – ··························· 27
5-5. Schematic Diagram – Syscon Section – ···························31
5-6. Schematic Diagram – CD Section – ·································34
5-7. Schematic Diagram – TC Section – ·································37
5-8. Schematic Diagram – Tuner Section – ·····························41
5-9. Printed Wiring Board – Tuner Section – ··························44
5-10. IC Pin Function ································································45
5-11. IC Block Diagrams ···························································47

After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for A C leakage. Check leakage as
described below.

LEAKAGE

The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. F ollow the man ufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a
VOM or batter y-operated A C voltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63T rd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

6. EXPLODED VIEWS

6-1. Rear Cabinet Section ························································ 51
6-2. Front Cabinet Section ······················································· 52
6-3. Upper Cabinet Section······················································ 53
6-4. Mechanism Deck Section-1 (MF-980-146) ····················· 54
6-5. Mechanism Deck Section-2 (MF-980-146) ····················· 55
6-6. Optical Pick-up Section (KSM-213CAM) ······················· 56

7. ELECTRICAL P ARTS LIST ······································· 57

Battery life

For CD radio cassette-corder

FM recording

Sony R20P : approx. 15 h
Sony alkaline LR20 : approx. 20 h

Tape playbac k

Sony R20P : approx. 12 h
Sony alkaline LR20 : approx. 17 h

CD recording

Sony R20P : approx. 4 h
Sony alkaline LR20 : approx. 6 h

Dimensions Approx. 435 × 163 × 242 mm (w/h/d)

(17 1/4 × 6 1/2 × 9 5/8 inches) (incl. projecting

parts)
Mass Approx. 3.9 kg (8 lb. 10 oz) (incl. batteries)
Supplied accessories AC power adaptor AC-CD980 (1)

Car battery cord DCC-EC9 (1)

Spare fuse (1)
Design and specifications are subject to change without notice.

Optional accessories

Sony MDR headphones series

T o Exposed Metal

Parts on Set

AC

0.15

µ

F

Fig. A. Using an A C v oltmeter to check A C leakage.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

1.5 k

Ω

Earth Ground

À LA SÉCURITÉ!

Voltmeter
(0.75 V)

— 2 —

SECTION 1

Insert a precision screw driver
and push SWITCH

SERVICE NOTES

The laser component in this product is
capable of emitting radiation exceeding the
limit for Class 1.

This appliance is classified as a CLASS 1
LASER product. The CLASS 1 LASER
PRODUCT MARKING is located on the rear
exterior.

The following caution label is located inside the
unit.

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair , pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.

• Code number of Chuck Plate Jig : X-4918-255-1

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

1. Press CD open knob.

2. Open the lid for CD.

3. Push on SWITCH as following figure.

4. Confirm the laser diode emission while observing the objecting
lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.

— 3 —

SECTION 2

GENERAL

— 4 —

— 5 —

— 6 —

— 7 —

— 8 —

— 9 —

— 10 —

SECTION 3

REAR CABINETSET

DC BOARD

BATTERY CASE / TUNER BOARD /
RESET BOARD

CABINET SUB ASSY,
FRONT / MAIN BOARD

CONTROL PANEL / SW1 BOARD

POWER SW BOARD / H/P BOARD

OPTICAL PICK-UP (KSM-213CAM) SECTION /
SW2 BOARD

REC BOARD / MECHANISM DECK (MF-980-146) SECTION

s

)

DISASSEMBLY

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

3-1. REAR CABINET

4

Catcher, antenna

Front cabinet

6

Rear cabinet

5

CN318

3

Screws 6pcs

(+B 3 × 20)

2

(+BV 3 × 12

1

Lid, battery case

Screws 5pc

3-2. DC BOARD

2

DC board

1

Screw (+BV 3 × 10)

Rear cabinet

— 11 —

d

3-3. BATTERY CASE / TUNER BOARD / RESET BOARD

s

8

Screw

7

CN1

4

Battery case

Upper cabinet

2

CN309

5

6

Screw

3

CN320

RESET boar

9

TUNER board

3-4. CABINET SUB ASSY, FRONT / MAIN BOARD

1

7

CN305

5

CN302

6

CN318

1

Screws 2pcs (+BV 3 × 12)

Screw (+B 3 × 20)

2

Screws 2pcs

(+BV 3 × 12)

8

CN309

9

CN304

!º

CN301

Remove solder

8

CN702

1

Screws 2pc

(+B 3 × 20)

3

Cabinet sub assy, front

Remove solder

4

Screws 2pcs

(+BV 3 × 12)

— 12 —

Remove solder

!™

Shield case, Main

!¡

CN315

4

Screw (+BV 3 × 12)

Front cabinet sub assy

4

POWER SW board

7

H/P board

1

CN317

5

CN303

2

Screw

(+BVTP 2.6 × 10)

6

Screw

(2.6 × 10 +PWH)

3

POWER BRACKET board

3-5. CONTROL PANEL / SW BOARD

2

Panel subassy, control

4

CN310

Upper cabinet assy

5

SW1 board

3

Screws 8pcs

1

Screws 4pcs

(+BVTP 3 × 12)

3-6. POWER SW BOARD / H/P BOARD

— 13 —

3-7. OPTICAL PICK-UP (KSM-213CAM) SECTION / SW2 BOARD

Upper Cabinet

5

SW2 board

4

Screws 3psc

(+BV 3 × 8)

3

Optical-pick up section

1

Spring, tension

(Remove adhesive agent.)

3-8. REC BOARD / MECHANISM DECK (MF-980-146) SECTION

1

Open the cassette lid.

4

Screws 4pcs

(+P 2 × 6 Type2)

2

Screws 4pcs

(2.6 × 10 +PWH)

Upper cabinet

5

REC board

— 14 —

3

Mechanism deck

2

Screws 4pcs

(+BV 3 × 10)

SECTION 4

Tape speed adjustment
control inside motor

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENT

PRECAUTION

1. Clean the following parts with a denatured-alchool-moistened
swab:

record/playback head pinch roller
erase head rubber belts
capstans

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. After the adjustments, apply suitable locking compound to the
parts adjusted.

Torque Measurement

Mode

FWD

FWD
back tension

Fast Forward

Rewind

Tape T ension Measurement

Torque Meter

CQ-102C

CQ-201B

Meter Reading

60g•cm

(0.42 – 0. 83 oz•inch)

1 – 5g•cm

(0.014 – 0.07 oz•inch)

more than 55g•cm

(more than 0.77 oz•inch)

more than 55g•cm

(more than 0.77 oz•inch)

4-2. ELECTRICAL ADJUSTMENT

TAPE RECODER SECTION

Standard output level

Output Pin

Load impedance
Output signal level

Test tape

Test Tape

WS-48A

P-4-A063

Tape Speed Adjustment

Procedure :

Mode : Playback

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

Signal

3kHz, 0dB

6.3kHz, –10dB

set

0.25 V (–10dB)

Tape speed adjustment
Head azimuth adjustment.

32

Ω

1dB = 0.775V

HP OUT

32 Ω

Used for

speed checker
LFM-30 or
digital frequency
counter

+
–

Torque Meter

CQ-403A

Meter Reading

more than 80g

(more than 2.83 oz)

J302 (phones)

Adjustment Value : normal tape speed

Speed checker

–3.0 to 3.0%

Frequency difference between the beginning and the end of the
tape should be within 3% (90Hz).

Adjustment Location :

Digital frequency counter

2,910 – 3,090Hz

— 15 —