Sony CSDXD-51 Service manual

CSD-XD51

SERVICE MANUAL

Ver 1.0 2004. 06

CD

Section

TC Model Name Using Similar Mechanism CSD-XD55

Section Tape Transport Mechanism Type MF-XD55

Model Name Using Similar Mechanism CSD-XD55

CD Mechanism Type KSM-213RDP

Optical Pick-up Name KSS-213R

US Model

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION
With 3.2-ohm loads, both channels driven from 150 - 6,300 Hz;
rated 3.0 W per channel-minimum 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

2

Frequency response

20 - 20 000 Hz +1/–2 dB

Wow and flutter

Below measurable limit

Radio section
Frequency range

FM 87.5 - 108 MHz
AM 530 - 1 710 kHz

Antennas

FM: Telescopic antenna
AM: Built-in ferrite bar antenna

Cassette recorder section

Recording system

4-track 2 channel stereo

Fast winding time

Approx. 120 s (sec.) with Sony cassette C-60

Frequency response

TYPE I (normal): 80 - 10 000 Hz
General
Speaker

Full range: 10 cm dia., 3.2 ohms, cone type (4)

Tweeter: 2.0 cm (2)
Outputs

Headphones jack (stereo minijack)

For 16 - 68 ohms impedance headphones

– Continued on next page –

9-877-952-01

2004F0279-1

© 2004.06

CD STEREO RADIO CASSETTE RECORDER

Sony Corporation

Personal Audio Company
Published by Sony Engineering Corporation

CSD-XD51

Power output

4.5 W + 4.5 W (at 3.2 ohms, 10% harmonic distortion
(DC))

Power requirements

For CD stereo radio cassette recorder:
120V AC, 60 Hz
9 V DC, 6 size D (R20) batteries

Power consumption

AC 17 W

Battery life

For CD stereo radio cassette recorder:

FM recording

Sony R20P: approx. 12 h
Sony alkaline LR20: approx. 34 h

Tape playback

Sony R20P: approx. 5.5 Ah
Sony alkaline LR20: approx. 15.5 h

CD playback

Sony R20P: approx. 2.5 h
Sony alkaline LR20: approx. 12 h

Dimensions

Approx. 552 x 271 x 318 mm (w/h/d)

3

⁄4 x 10 5⁄8 x12 1⁄2 inches) (incl. projecting parts)

(21
Mass Approx. 5.4 kg (11 lb. 14 oz) (incl. batteries)
Supplied accessory

AC power cord (1)

Design and specifications are subject to changewithout notice.

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

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down 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 CHECK-OUT

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 AC 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.

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 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
damaged by heat.

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
VOM or battery-operated AC voltmeter. 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

Par ts on Set

AC

0.15 µF

1.5 kΩ

Voltmeter
(0.75 V)

Earth Ground

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

2

CSD-XD51

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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.

Unleaded solder

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

•Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!

• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

Note on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be
damaged by heat.

TABLE OF CONTENTS

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

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 6

3-2. Cabinet (Top) Assy ..........................................................6

3-3. Cabinet (Front Assy), Cabinet (Bottom) Assy .................7

3-4. Wires................................................................................ 8

3-5. MD Block ........................................................................ 9

3-6. Cassette Holder................................................................ 9

3-7. Main Board ...................................................................... 10

3-8. Tuner Board ..................................................................... 10

3-9. Power Board .................................................................... 11

3-10. CD Lid ............................................................................. 11

3-11. CD Block Assy ................................................................ 12

3-12. Optical Pick-up ................................................................ 12

3-13. R/P Head (HRP301), TC Board ...................................... 13

3-14. Main Belt, RF Belt, Motor Assy (M301) ........................ 13

4. MECHANICAL ADJUSTMENTS......................... 14

5. ELECTRICAL ADJUSTMENTS .......................... 14

6. DIAGRAMS

6-1. IC Pin Description ........................................................... 17

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

6-3. Block Diagram – CD Section – ....................................... 18

6-4. Block Diagram – Main Section – .................................... 19

6-5. Printed Wiring Board – CD Section – ............................. 20

6-6. Schematic Diagram – CD Section – ................................21

6-7. Printed Wiring Board – Tuner Section – ......................... 22

6-8. Schematic Diagram – Tuner Section – ............................ 23

6-9. Printed Wiring Board – Main Section – .......................... 24

6-10. Schematic Diagram – Main Section (1/2) – .................... 25

6-11. Schematic Diagram – Main Section (2/2) – .................... 26

6-12. Printed Wiring Board – TC Section –.............................. 27

6-13. Schematic Diagram – TC Section – ................................ 28

6-14. Printed Wiring Board – Control Section – ...................... 29

6-15. Schematic Diagram – Control Section – ......................... 30

6-16. Printed Wiring Board – Power Supply Section – ............ 31

6-17. Schematic Diagram – Power Supply Section – ............... 32

6-18. IC Block Diagrams .......................................................... 33

7. EXPLODED VIEWS

7-1. Cabinet Section................................................................ 36

7-2. Cabinet (Front) Section-1 ................................................ 37

7-3. Cabinet (Front) Section-2 ................................................ 38

7-4. Cabinet (Top) Section ......................................................39

7-5. Cabinet (Bottom) Section ................................................ 40

7-6. Tape Mechanism Section (MF-XD55) ............................ 41

7-7. CD Mechanism Section (KSM-213RDP) ....................... 42

8. ELECTRICAL PARTS LIST .................................. 43

3

CSD-XD51

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[OPERATE]button and press[CD] button to CD
position.

2. Open the CD lid.

3. Turn on S801 with screwdriver, etc. as following figure.

4. Press the N X (CD) button.

5. 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 three times for focus search.

S801

4

LOCATING THE CONTROLS

Location of controls

ZPUSH

OPEN/CLOSE

PAUSE

STOP/EJECT

FF REW

PLAY

REC

TUNE –,+

VOLUME –,+*

ZPUSH OPEN/CLOSE

SURROUND

S-BASS

SLEEP

u

POWER HEADPHONES

OPR/BATT

MODE

DISPLAY/ENTER/MEMORY

.,>
PRESET –,+

CD, RADIO BAND/
AUTO PRESET, TAPE

x

Loading a CD

With the labeled side up

Inserting a cassette

With the side you want
to play facing you

Total track number

Programmed track Playing order

EF

Total playing time

Display

*

The button has a tactile dot.

Display

SECTION 2

GENERAL

CSD-XD51

This section is extracted
from instruction manual.

5

CSD-XD51

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

3-1. DISASSEMBLY FLOW

SET

3-2 CABINET (TOP) ASSY

(Page 6)

3-3. CABINET (FRONT) ASSY,

3-10. CD LID
CABINET (BOTTOM) ASSY
(Page 7)

3-4. WIRES

(Page 8)

3-5. MD BLOCK

(Page 9)

3-6. CASSETTE HOLDER

3-7. MAIN BOARD

(Page 10)

3-13. R/P HEAD (HRP301),

(Page 9)

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

3-2. CABINET (TOP) ASSY

3

two

screws

(+BV (B3

1

two

screws

)

(+BV (B3

)

3-11. CD BLOCK ASSY

(Page 11)

3-12. OPTICAL PICK-UP

3-8. TUNER BOARD

(Page 10)

TC BOARD
(Page 13)

)

)

(Page 12)

(Page 12)

3-9. POWER BOARD

(Page 11)

3-14. MAIN BELT (B),

SUB BELT (B)
MOTOR ASSY (M301),
(Page 13)

7

connector

(CNP302)

6

CNP702

4

5

connector

(CNJ807)

2

screw

(+BV (B3

1

two

screws

(+BV (B3

8

cabinet (top) assy

)

)

)

)

6

3-3. CABINET(FRONT)ASSY, CABINET(BOTTOM)ASSY

y

6

two

screws

screws

(+BV (B3))

qa

connector

(CNP806)

7

three

(+BV (B3))

0

connector

(CNP305)

9

CNP805

5

(+BV (B3))

screw

CSD-XD51

4

screw

(+BV (B3))

3

two

screws

(+BV (B3))

cabinet (bottom) ass

qs

CNP808

qf

cabinet (front) assy

qd

CNP801

8

three

(+BV (B3))

screws

1

battery lid

2

three

(+BV (B3))

screws

7

CSD-XD51

3-4. WIRES

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

from MAIN board

cabinet front

A

B

CD

E

F

G

cabinet bottom

H

I

8

3-5. MD BLOCK

)

2

two

(+BV (B3

4

MD block

3

two

(+BV (B3

screws

)

screws

CSD-XD51

)

)

)

cassette holder

3-6. CASSETTE HOLDER

1

2

damper

1

screw

(+BV (B3

)

4

cassette spring

3

cassette holder

9

CSD-XD51

)

3-7. MAIN BOARD

2

connector

(CNP810)

3

connector

(CNP304)

5

screw

(+BV (B3

1

(CNP811)

)

)

connector

4

two

screws

(+BV (B3

6

MAIN board

)

)

3-8. TUNER BOARD

3

(+BV (B3))

screws

2

telescopic antenna

1

screws

(+P (M3

)

10

4

two claws

5

6

TUNER board

3-9. POWER BOARD

n

2

two

screws

(+BV (B3))

3

two

screws

(+BV (B3))

4

screw

(+BV (B3))

1

connector

(CNP906)

5

POWER board

CSD-XD51

3-10. CD LID

2

projection

3

CD lid

1

projectio

CD spring

11

CSD-XD51

)

3-11. CD BLOCK ASSY

3

CD cover

3-12. OPTICAL PICK-UP

5

sled shaft

two claws

2

two

screws

(+PWH 2.6

x

10)

6

optical pick-up

two claws

4

CD block assy

1

two

(+PWH 2.6

claw

screws

x

10)

12

3

screw

PWB tapping (M2)

(

1

gear (A)

4

)

2

screw

PWB tapping (M2)

(

3-13. R/P HEAD(HRP301),TC BOARD

)

)

1

two claws

6

Remove the four solderings.

5

3

(+BVTT 2

4

lug

7

TC board

screw

CSD-XD51

x

4

2

R/P head (HRP301)

3-14. MAIN BELT, RF BELT, MOTER ASSY(M301)

main belt

4

7

8

motor bracket

3

2

screw

(

bind DT M2 x 6

1

(

motor assy (M301

screw

bind DT M2 x 6

)

)

5

RF belt

6

two

screws

(

pan M2.6 x 4.5

)

13

CSD-XD51

y

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. The adjustments should be performed with the rated power

supply voltage (9V) unless otherwise noted.

Torque Measurement

Mode Torque meter Meter reading

2.95 – 6.86 mN • m

FWD CQ-102C (30 – 70 g • cm)

(0.42 – 0.97 oz • inch)

FWD

Back Tension

FF CQ-201B (more than 60 g • cm)

REW CQ-201B (more than 60 g • cm)

CQ-102C (1.5 – 5.5 g • cm)

0.15 – 0.53 mN • m

(0.021 – 0.076 oz • inch)

more than 5.88 mN • m

(more than 0.83 oz • inch)

more than 5.88 mN • m

(more than 0.83 oz • inch)

Tape Tension Measurement

Mode Tension meter Meter Reading

FWD CQ-403A

more than 100 g

(more than 3.53 oz)

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

Tape Speed Adjustment

Procedure:

Mode: playback
Adjust so that the value on the digital frequency counter is
3,000 Hz.

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

set

i

jack (J321)

Specification Value:

Digital frequency counter

2,940 to 3,060 Hz

Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,970 to 3,030 Hz.

digital frequenc
counter

Ω

32

Adjustment Location:

Tape speed adjustment
control inside motor

14

CSD-XD51

)

TUNER SECTION 0 dB = 1 µV

• AM Section

Setting:

RADIO BAND•AUTO PRESET button: AM

AM RF signal
generator

30% amplitude
modulation by
400 Hz signal

• FM Section

Setting:

RADIO BAND•AUTO PRESET button: FM

FM RF signal
generator

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

• Connecting Level Meter (FM, AM)

Put the lead-wire
antenna close to
the set.

TP (FM IN)

0.01

µ

F

set

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

450 kHz

AM FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.0 ± 0.05 V 5.3 ± 0.7 V
Adjustment Part L4 <confirmation>

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 CT3

620 kHz 1,400 kHz

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T2

10.7 MHz

FM FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.3 ± 0.3 V 3.0 ± 0.2 V
Adjustment Part <confirmation> L2

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 CT1

87.5 MHz 108 MHz

level meter
(range: 0.5–5 V ac

32 Ω

set

i jack (J321)

• Connecting Digital Voltmeter (FM, AM)

digital
voltmeter

100 kΩ

TP (VT)

• 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 16.

15

CSD-XD51

Adjustment Location:

– MAIN board (component side) –

CT3,L3

AM

TRACKING

ADJUSTMENT

L3

CT1, L1

FM

TRACKING

ADJUSTMENT

L2

L2

FM

FREQUENCY

COVERAGE

ADJUSTMENT

TP (FM IN)

(CONDUCTOR SIDE)

T1

AM IF

ADJUSTMENT

T2

FM IF

ADJUSTMENT

T1

T2

L1

CT1

IC1

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 TP (RF) and TP (VREF).

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

3. Press the N X (CD) 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 : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS

RF level :

0.85 ± 0.2 Vp-p

CT3

L4

L4

AM

FREQUENCY

COVERAGE

ADJUSTMENT

Test Point:

oscilloscope

– CD board (conductor side) –

R734

R736

R706

TP

R701

(VREF)

C739

C707

TP(VREF)

R710

R733

R735

JW708

IC2

R709

C736

(CONDUCTOR SIDE)

TP(RF)

R711

R713

TP

C705

(RF)

C734

TP (VT)

C704

C731

R708

JW726

C743

JW725

R729

C703

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

16

C732

JW709

JW706

JC703

C708

JW707

C742

R723

C709

IC701

C711