SCD-1, SCD-777ES (serv.man3) - Sony Audio Service Manual (repair manual)

For Technical service

US Model

Canadian Model

AEP Model

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3

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5

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7-1. Notes for Printed Wiring Board and

Schematic Diagram ......................................................... 17

7-2. Printed Wiring Boards  – RF/SLD-FG/SLD-MOT

Boards – ........................................................................... 18

7-3. Schematic Diagram  – RF/SLD-FG/SLD-MOT

Boards – ........................................................................... 19

7-4. Printed Wiring Boards  – LOAD-CN/LOAD-MOT/

LOAD-SW/STB Boards – .............................................. 20

7-5. Schematic Diagram  – LOAD-CN/LOAD-MOT/

LOAD-SW/STB Boards – .............................................. 21

7-6. Printed Wiring Board  – MAIN Board

(component side) – .......................................................... 22

7-7. Printed Wiring Board  – MAIN Board

(conductor side) – ........................................................... 23

7-8. Schematic Diagram  – MAIN Board (1/7) – .................. 24

7-9. Schematic Diagram  – MAIN Board (2/7) – .................. 25
7-10. Schematic Diagram  – MAIN Board (3/7) – .................. 26
7-11. Schematic Diagram  – MAIN Board (4/7) – .................. 27
7-12. Schematic Diagram  – MAIN Board (5/7) – .................. 28
7-13. Schematic Diagram  – MAIN Board (6/7) – .................. 29
7-14. Schematic Diagram  – MAIN Board (7/7) – .................. 30
7-15. Printed Wiring Board  – AUDIO Board – ...................... 31
7-16. Schematic Diagram  – AUDIO Board (1/2) – ................ 32
7-17. Schematic Diagram  – AUDIO Board (2/2) – ................ 33
7-18. Printed Wiring Boards  – BAL(SCD-1)/COAX/

OPT/PIN/SW Boards – ................................................... 34

7-19. Schematic Diagram  – BAL(SCD-1)/COAX/

OPT/PIN/SW Boards – ................................................... 35

7-20. Printed Wiring Boards  – DISPLAY/SW-L/

SW-R Boards – ................................................................ 36

7-21. Schematic Diagram  – DISPLAY/SW-L/

SW-R Boards – ................................................................ 37

7-22. Printed Wiring Boards  – AC/POWER Boards – ........... 38
7-23. Schematic Diagram  – AC/POWER Boards – ................ 39
7-24. IC Pin Function Description ........................................... 43

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2

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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.

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CAUTION

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

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

The following caution label is located inside the unit.

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 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

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 following caution label is located
inside of the unit.

TO PREVENT ELECTRIC SHOCK, DO
NOT USE THIS POLARIZED AC PLUG
WITH AN EXTENSION CORD,
RECEPTACLE OR OTHER OUTLET
UNLESS THE BLADES CAN BE FULLY
INSERTED TO PREVENT BLADE
EXPOSURE.

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

3

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.

Part No.

Model

Part No.

SCD-1: US, Canadian

4-215-784-1s

SCD-1: AEP

4-215-784-2s

SCD-777ES: AEP

4-221-854-0s

SCD-777ES: US, Canadian

4-221-854-1s

1. Set the CD1/CD2 switch on the remote commander to CD1.
2. With the power turned on, press the [CHECK] button on the

remote commander while pressing the [TEXT] button on the
set.

3. 15-digit numeric value will be displayed, and the top 4 digits

(left side) of the numeric value imply the microcomputer ROM
version.
Example: If “200006100FFFF3C” is displayed, the ROM ver-
sion is 2.000.

4. To cancel the ROM version check mode, press the [CHECK]

button on the remote commander while pressing the [TEXT]
button on the set.

insulator

OP mechanism section (BU-23)

Any board to put

connect two jigs (extension cable J-2501-164-A) to the RF board 
(CN001, 002) and Main board (CN501, 502).

In checking the BU section, prepare two new jigs (extension cable J-2501-164-A: 1.00 mm 26 cores).

Display

Contents

TOC ERROR  

****

Illegal SACD disc (pirate edition)

TOC ERROR  

*

Not SACD (DVD disc etc.)

4

1) A red laser diode for Super Audio CD Player requires more

attention to static electricity than general infrared laser diodes
for CD.
Because its durability to static electricity is far weaker than
that of infrared laser diodes, always use an earth band when
handling the optical pick-up block as service parts.

2) As for the flexible board KHS-180A (RP) packed as service

parts, the short lands have been soldered to protect from static
electricity. Accordingly, remove solders when replacing opti-
cal pick-up. (See Fig. 1)

3) In handling the KHS-180A (RP), do not touch inhibited parts

shown in Fig. 2, but grip the slide base bearing and U-shaped
guide.

DVD short land

CD short land

Slide base bearing

Skew sensor

Lens actuator
covers

Objective lenses

U-shaped guide

OEIC

Laser holder

Flexible board

Connector

Laser coupler

Touch inhibited parts
• Objective lens
• Skew sensor
• Laser holder
• Laser coupler
• Flexible board
• OEIC
• Lens actuator covers