CDP-CX57 - Sony Audio Service Manual (repair manual)

MICROFILM

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Laser

Semiconductor laser (

λ

 = 780 nm)

Emission duration:  continuous

Laser output

Max 44.6 µW*
* This output is the value measured at

a distance of 200 mm from the
objective lens surface on the
Optical Pick-up block with 7 mm
aperture.

Frequency response

20 Hz to 20 kHz ± 1dB

Signal-to-noise ratio

More than 107 dB

Dynamic range

More than 88 dB

Harmonic distortion

Less than 0.013%

Channel separation

More than 100 dB

Model Name Using Similar Mechanism CDP-CX50/CX571

CD Mechanism Type

CDM-46C1

Base Unit Type

KSM-213BFN/M-NP

Optical Pick-up Type

KSS-213B/S-N

LINE OUT

Phono

2V

Over 10 kilohms

Jacks

(at 50 kilohms)

DIGITAL

Optical

–18 dBm

Wave length: 660 nm

OUT

output

(OPTICAL)

connector

US/Canada

120 V AC, 60 Hz

Australia

240 V AC, 50/60 Hz

UK

220 V – 230 V AC, 50/60 Hz

Other countries

110 V – 120 V or 220 V – 240 V AC,
adjustable, 50/60 Hz

Power requirements

Power consumption

12 W

Dimensions (approx.)

When the front cover is closed

(w/h/d)

430 

×

 182.5 

×

 295 mm (17 

×

 7 1/4 

×

 11 5/8 in.)

incl. projecting parts
When the front cover is open
430 

×

 182.5 

×

 414 mm (17 

×

 7 1/4 

×

 16 3/8 in.)

incl. projecting parts

Mass (approx.)

5.5 kg (12 lbs 3 oz)

Audio cord (2 phono plugs – 2 phono plugs) (1)
CONTROL A1 cord (supplied for Canadian models only) (1)
Remote commander (remote) (1)
Sony SUM-3 (NS) batteries (2)
CD booklet holder (1) and Label (1)

Design and specifications are subject to change without notice.

– 2 –

...............................................

2

...................................................................

6

.........................................................

7

.............................................................. 11

....................... 14

......................... 17

................................................................. 20

7-1. Block Diagrams

• BD Section .................................................................... 23
• Main Section ................................................................. 25

7-2. Printed Wiring Board  – BD Section – ........................... 27
7-3. Schematic Diagram – BD Section – ............................... 29
7-4. Printed Wiring Board  – Audio Section – ....................... 31
7-5. Schematic Diagram  – Audio Section – .......................... 33
7-6. Printed Wiring Board  – Main Section – ........................ 35
7-7. Schematic Diagram  – Main Section – ........................... 37
7-8. Printed Wiring Boards  – Panel Section – ...................... 39
7-9. Schematic Diagram  – Panel Section – .......................... 41
7-10. Printed Wiring Boards  – Sensor/Motor Section – ......... 43
7-11. Schematic Diagram  – Sensor/Motor Section – ............. 45
7-12. IC Pin Function Description ........................................... 49

................................................ 55

............................... 61

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

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.

4-997-568-0

π

4-997-568-1

π

4-997-568-2

π

4-997-568-3

π

4-997-568-4

π

4-997-568-5

π

4-997-568-6

π

US model

Canadian model

AEP, AED model

UK model

Australian model

E model

Singapore model

PART No.

MODEL

• Abbreviation

AED:  North European

PART No.

!   KERÜLJE  A  BESUGÁRZÁST! 

The following caution label is located inside the unit.

– 3 –

!

!

!

After correcting the original service problem, perform the follow-
ing 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 AC leakage.
Check leakage as described below.

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 microampers.).
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

VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)

1.5 k

Ω

0.15 

µ

F

AC
voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

The laser diode in the optical pick-up block may suffer electro-
static 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.

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
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.

Carry out the “S curve check” in ”CD section adjustment” and
check that the S curve waveform is output repeatedly.

– 4 –

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display.
To check, perform the following procedure.

1. Turn ON the power, set the disc on the disc table with the side labeled as “test disc” as the right side, close the front cover, and chuck the

disc.

2. Press the  

·  button and play back the disc.

3. The following will be displayed on the fluorescent indicator tube.

Display : 1kHz/0 dB/ L&R

4. Press the  

≠  and  ±  buttons to switch the track. The text data of each track will be displayed.

For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CD-
TEXT TEST DISC Recorded Contents and Display”.

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For
details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.

1

1kHz/0dB/L&R

22

1kHz/-90dB/L&R

2

20Hz/0dB/L&R

23

Infinity Zero w/o emphasis//L&R

3

40Hz/0dB/L&R

24

Infinity Zero with emphasis//L&R

4

100Hz/0dB/L&R

25

400Hz+7kHz(4:1)/0dB/L&R

5

200Hz/0dB/L&R

26

400Hz+7kHz(4:1)/-10dB/L&R

6

500Hz/0dB/L&R

27

19kHz+20kHz(1:1)/0dB/L&R

7

1kHz/0dB/L&R

28

19kHz+20kHz(1:1)/-10dB/L&R

8

5kHz/0dB/L&R

29

100Hz/0dB/L*

9

7kHz/0dB/L&R

30

1kHz/0dB/L*

10

10kHz/0dB/L&R

31

10kHz/0dB/L*

11

16kHz/0dB/L&R

32

20kHz/0dB/L*

12

18kHz/0dB/L&R

33

100Hz/0dB/R*

13

20kHz/0dB/L&R

34

1kHz/0dB/R*

14

1kHz/0dB/L&R

35

10kHz/0dB/R*

15

1kHz/-1dB/L&R

36

20kHz/0dB/R*

16

1kHz/-3dB/L&R

37

100Hz  Squer Wave//L&R

17

1kHz/-6dB/L&R

38

1kHz  Squer Wave//L&R

18

1kHz/-10dB/L&R

39

1kHz  w/emphasis/-0.37dB/L&R

19

1kHz/-20dB/L&R

40

5kHz  w/emphasis/-4.53dB/L&R

20

1kHz/-60dB/L&R

41

16kHz  w/emphasis/-9.04dB/L&R

21

1kHz/-80dB/L&R

TRACK

No.

Displayed Contents

 The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.

TRACK

No.

Displayed Contents