Sony CFD-S39 Service manual

CFD-S39

SERVICE MANUAL

Ver 1.0 1999. 05

Section

US Model

Model Name Using Similar Mechanism CFD-S38 CD Mechanism Type KSM-213CDM Optical Pick-up Name KSS-213C Model Name Using Similar Mechanism NEW Tape Transport Mechanism Type MF-B7S-148

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION With 6-ohm loads, both channels driven from 100 - 10,000 Hz; rated 4 W per channelminimum RMS power, with no more than 10% total harmonic distortion in AC operation.

Other Specifications CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wave length: 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

Frequency response

20 - 20,000 Hz +1/–2 dB

Wow and flutter

Below measurable limit

SPECIFICATIONS

Radio section

Frequency range

FM: 87.6 - 108 MHz AM: 530 - 1,710 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. 90 sec. with Sony cassette C-60

Frequency response

TYPE I (normal): 70 - 13,000 Hz

General

Speaker

Full range: 10 cm (4 in.) dia., 6 ohms, cone type (2)

Outputs

Headphones jack (stereo minijack) For 16 - 68 ohms impedance headphones

– Continued on next page –

MICROFILM

CD RADIO CASSETTE-CORDER

– 1 –

Power requirements

For CD radio cassette-corder: 120 V AC, 60 Hz 9 V DC, 6 size D (R20) batteries For memory back-up: 6 V DC, 4 size AA (R6) batteries For remote control: 3 V DC, 2 size AA (R6) batteries

Power consumption

AC 18 W

Battery life

For CD radio cassette-corder:

FM recording

Sony R20P: approx. 3.5 h Sony alkaline LR20: approx. 10 h

Tape playback

Sony R20P: approx. 1.5 h Sony alkaline LR20: approx. 5 h

CD playback

Sony R20P: approx. 1 h Sony alkaline LR20: approx. 4 h

Dimensions

Approx. 420 × 156 × 262 mm (w/h/d)

5/8 × 6 1/4 × 10 3/8 inches) (incl. projecting parts)

(16

Mass

Approx. 4.7 kg (10 lb. 6 oz.) (incl. batteries)

Supplied accessories

AC power cord (1) Remote control RMT-CS38A (1)

Design and specifications are subject to change without notice.

CAUTION

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

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270˚C during

repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

Notes on Chip Component Replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

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.

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 P ARTS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

SAFETY CHECK-OUT

TABLE OF CONTENTS

After correcting the original service problem, perform the following safety check 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 TEST

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. Follow the manufacturers’ 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 V OM or battery-operated A C v oltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd 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)

To Exposed Metal Parts on Set

0.15µF

1.5k

Ω

Earth Ground

AC voltmeter (0.75V)

Fig. A. Using an AC voltmeter to check AC leakage.

1. SERVICING NOTES......................................................... 4

2. GENERAL

Playing a CD ........................................................................... 5

Listening to the radio............................................................... 5

Playing a tape .......................................................................... 6

Recording on a tape ................................................................. 6

3. DISASSEMBLY

3-1. Lid, Battery Case................................................................. 7

3-2. Cabinet Assy, Front .............................................................7

3-3. Wires ...................................................................................8

3-4. Power Assy ..........................................................................8

3-5. Antenna, Telescopic ............................................................ 9

3-6. Tuner Board......................................................................... 9

3-7. Cabinet (Upper) Assy........................................................ 10

3-8. Main Board ....................................................................... 10

3-9. CD Mechanism Block ....................................................... 11

3-10. Tape Mechanism Block ..................................................... 11

3-11. Head, Magnetic (HRP301)................................................ 12

3-12. Belt .................................................................................... 12

4. MECHANICAL ADJUSTMENTS............................... 13

5. ELECTRICAL ADJUSTMENTS

Tape Section .......................................................................... 13

Tuner Section......................................................................... 14

CD Section ............................................................................ 15

6. DIAGRAMS

6-1. IC Pin Description............................................................. 16

6-2. Circuit Boards Location .................................................... 17

6-3. Block Diagram – CD Section –......................................... 19

6-4. Block Diagram – Main Section –...................................... 21

6-5. Schematic Diagram – Tuner Section –.............................. 23

6-6. Printed Wiring Board – Tuner Section – ........................... 25

6-7. Printed Wiring Board – Control Section – ........................ 26

6-8. Printed Wiring Boards – Main Section – .......................... 27

6-9. Schematic Diagram – Main Section (1/3) – ...................... 29

6-10. Schematic Diagram – Main Section (2/3) – ...................... 31

6-11. Schematic Diagram – Main Section (3/3) – ...................... 33

6-12. Printed Wiring Boards – Power Supply Section – ............ 35

6-13. Schematic Diagram – Power Supply Section –................. 37

6-14. Printed Wiring Board – Sound Section – .......................... 39

6-15. Schematic Diagram – Sound Section – ............................. 39

7. EXPLODED VIEWS

7-1. Cabinet (Front) Section ..................................................... 44

7-2. Cabinet (Rear) Section ...................................................... 45

7-3. Cabinet (Upper) Section.................................................... 46

7-4. Tape Mechanism Deck Section-1 ...................................... 47

7-5. Tape Mechanism Deck Section-2 ...................................... 48

7-6. Tape Mechanism Deck Section-3 ...................................... 49

7-7. Tape Mechanism Deck Section-4 ...................................... 50

7-8. Optical Pick-up Section..................................................... 51

8. ELECTRICAL PARTS LIST ........................................ 52

– 3 –

SECTION 1

SERVICING NOTES

CHUCK PLATE JIG ON REPAIRING

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

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

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

1. Turn ON the POWER button and press FUNCTION button to CD position.

2. Open the lid (CD).

3. Turn on S501 with screwdriver, etc. as following figure.

4. Press the CD ﬂ button.

5. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto P o wer Control circuit or Optical Pick-up is broken. Objective lens moves up and down three times for focus search.

S501

– 4 –

SECTION 2

GENERAL

This section is extracted from instruction manual.

– 5 –

– 6 –

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

Lid, battery case

Cabinet assy, front

Wires Power assy

Antenna, telescopic

Tuner board

Cabinet (upper) assy

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

3-1. LID, BATTERY CASE

screws +BVTP 3x10

Main board

lid, battery case

screws +BVTP 3x10

Tape mechanism block

CD mechanism block

screws +BVTP 3x12

Head, magnetic (HRP301)

Belt

3-2. CABINET ASSY, FRONT

cabinet assy, front

CNP307

– 7 –

CNP502

3-3. WIRES

)

Put flat cable and wires between the cabinets and push them in the grooves located at A to F in the figure to prevent disconnection before assembling the set.

FRONT CABINE

3-4. POWER ASSY

CABINET (REAR

screws +BVTP 3x10

– 8 –

CNP901

power assy

CNP902

3-5. ANTENNA, TELESCOPIC

antenna, telescopic

3-6. TUNER BOARD

screw +B 3x8

tuner retainer board

screw +BVTP 3x10

CNP2

CNP1

– 9 –

TUNER board

3-7. CABINET (UPPER) ASSY

screw +BVTP 3x10

screws +BVTP 3x10

CNP902

holder assy, cassette

!¡

screws +BVTP 3x10

lid (CD)

screw +BVTP 3x10

!™

cabinet (upper) assy

!£

handle

3-8. MAIN BOARD

CNP901

CNP311

CNP1

screws +BVTP 3x10

connector

CNP2

CNP301

screw +BVTP 3x12

!º

CNP305

CNP304

wire (flat type) (16 core)

screws +BVTP 3x1

!¡

MAIN board

connector

– 10 –

3-9. CD MECHANISM BLOCK

screws (2.6x10)

CD mechanism block

3-10. TAPE MECHANISM BLOCK

screws +BVTP 3x10

chassis (leaf)

tape mechanism bloc

– 11 –

3-11. HEAD, MAGNETIC (HRP301)

)

arm, pas

screws (1.4), tapping

head, magnetic (HRP301)

Removal the

five solders.

TRANSLATION (HEAD board

3-12. BELT

motor assy

flywheel (S) assy

belt

flywheel (F) assy

– 12 –

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

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

record/playback head pinch roller erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer 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.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode Torque Meter Meter Reading

Forward CQ-102C

Forward back tension (0.014 – 0.069 oz • inch)

Reverse CQ-102RC

Reverse back tension (0.014 – 0.069 oz • inch)

Fast Forward (0.76 – 1.94 oz • inch)

Rewind CQ-201B

T ape T ension Measurement

Mode Tension Meter Meter Reading

Forward CQ-403A more than 170 g Reverse CQ-403R (more than 6.00 oz)

CQ-102C

CQ-102RC

CQ-201B

25 – 60 g • cm

(0.35 – 0.83 oz • inch)

1 – 5 g • cm

25 – 60 g • cm

(0.35 – 0.83 oz • inch)

1 – 5 g • cm

55 – 140 g • cm

(0.76 – 1.94 oz • inch)

TAPE SECTION 0 dB = 0.775 V

• Standard Output Level Output terminal HP OUT

load impedance 32 Ω

output signal level 0.25 V (–10 dB)

• Test Tape

Type Signal Used for

WS-48A 3 kHz, 0 dB tape speed adjustment

T ape Speed Adjustment

Procedure:

Mode: playback

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

set

jack (J301)

1. Playback the test tape in the FWD playback mode.

2. Confirm that the digital frequency counter reading indicates a

value in the range of 2,940 to 3,060 Hz at tape top.

3. If the specification is not satisfied, adjust variable resistor of

motor until the frequency counter reading is as close to 3,000 Hz as possible at the FWD tape top. Specification : 2,910 to 3,090 Hz

4. Frequency difference between the beginning and the end of the

tape should be within 1.5% (45 Hz).

Adjustment Location:

digital frequency counter

Ω

– 13 –

Tape speed adjustment

)

3.0 ± 1.0 mm

L3 AM FERRITE-ROD ANTENNA

TUNER SECTION 0 dB = 1 µV

• FM Section

Setting:

RADIO (BAND) button: FM

FM RF signal generator

TP (FM ANT)

0.01

75 kHz frequency deviation by 1 kHz signal output level : as low as possible

• AM Section

Setting:

RADIO (BAND) button: AM

AM RF signal generator

30% amplitude modulation by 400 Hz signal

• Connecting Level Meter (FM and AM)

Put the lead-wire antenna close to the set.

set

FM FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 87.5 MHz 108 MHz Reading on Digital voltmeter 1.6 ± 0.4 V 4.3 ± 0.1V Adjustment Part <confirmation> L2

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 CT1

87.5 MHz 108 MHz

AM FREQUENCY COVERAGE

CHECK

Frequency Display 530 kHz 1,710 kHz

Reading on Digital voltmeter 1.0

– 0.5 V – 0.6 V

+ 0.7 V

4.8

+ 1.2V

Adjustment Part <confirmation> <confirmation>

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 CT3

620 kHz 1,400 kHz

• For AM adjustment, fix the ferrite-rod antenna (L3) as shown below and then perform tracking adjustment at L4 and CT3. Lastly check the voltage.

level meter (range: 0.5–5 V ac

Ω

set

jack (J301)

• Connecting Digital Voltmeter (FM and AM)

digital voltmeter

100 k

Ω

TP (VT) (JW17)

• Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

Adjustment Location: See page 15.

– 14 –

Adjustment Location:

TRACKING

ADJUSTMENT

TRACKING

ADJUSTMENT

CT3

CT1

FREQUENCY

COVERAGE

ADJUSTMENT

– tuner board (component side) –

(FM ANT)

TP (VT)

(JW17)

CD SECTION

CD section adjustments are done automatically in this set. In case of operation check, confirm that focus bias.

FOCUS BIAS CHECK

1. Connect the oscilloscope between IC701 pin #£ (TP RFO) and GND on CD board.

2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)

3. Press the CD ﬂ button.

4. Confirm that the oscilloscope waveform is as shown in the figure below. (eye pattern) A good eye pattern means that the diamond shape ( ) in the center of the waveform can be clearly distinguished.

• RF signal reference waveform (eye pattern)

VOLT/DIV : 200 mV (10 : 1 probe in use) TIME/DIV : 500 nS

RF level :

0.1 Vp-p

1.2

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

Test Point:

– main board (conductor side) –

TP (RFO)

– 15 –

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