Sony scd 1777 es service manual

Page 1

CD-1/ 777ES

SONYG,

SERVICE MANUAL

For Technical service

>1

772.

773.

774.

775.

776.

777.

778.

US Model
Canadian Model
AEP Model

TABLE OF CONTENTS

SERVICING NOTES ............................................... 3
DISASSEMBLY-2 ..................................................... 5
TEST MODE .............................................................. 10
ELECTRICAL ADJUSTMENTS ......................... 12
DIAGRAMS

Notes for Printed Wiring Board and

Schematic Diagram ......................................................... 17
Printed Wiring Boards 7 RF/SLD7FG/SLD7MOT

Boards 7 ........................................................................... 18

Schematic Diagram 7 RF/SLD7FG/SLD7MOT

Boards 7 ........................................................................ 19
Printed Wiring Boar 7 LOAD-CN/LOAD7MOT/
LOAD7SW/STB Boards 7 .............................................. 20
Schematic Diagram 7 LOAD7CN/LOAD7MOT/
LOAD7SW/STB Boards 7 .............................................. 21
Printed Wiring Board 7 MAIN Board

(component side) 7 .......................................................... 22
Printed Wiring Board 7 MAIN Board

(conductor side) 7 ...................................... 23
Schematic Diagram 7 MAIN Board (l/7) 24

779.

7710.
7-11.
7712.
7713.
7714.
7-15.
7716.
7717.
7718.

7719.

7720.

7721.

7722.

7-23.
7724.

Schematic Diagram 7 MAIN Board (2/7) 7 . 25
Schematic Diagram 7 MAIN Board (3/7) 7. 26
Schematic Diagram 7 MAIN Board (4/7) 7 . 27
Schematic Diagram 7 MAIN Board (5/7) 28
Schematic Diagram 7 MAIN Board (6/7) 29
Schematic Diagram 7 MAIN Board (7/7) 30
Printed Wiring Board 7 AUDIO Board 7 .. 3]

Schematic Diagram 7 AUDIO Board (1/2) 7 32

Schematic Diagram 7 AUDIO Board (2/2) 7 33
Printed Wiring Boards 7 BAL(SCD7I)/COAX/
OPT/PIN/SW Boards 7 ................................................... 34
Schematic Diagram 7 BAL(SCD-l)/COAX/
OPT/PIN/SW Boards 7 ................................................... 35
Printed Wiring Boards 7 DISPLAY/SW7L/

SW7R Boards 7 ................................................................ 36
Schematic Diagram 7 DISPLAY/SW-L/

SW-R Boards 7 ............................................... 37
Printed Wiring Board 7 AC/POWER Board .. 3%
Schematic Diagram 7 AC/POWER Boards 7 39
IC Pin Function Description .......................... 43
EXPLODED VIEWS ................................................ 50
ELECTRICAL PARTS LIST ............................... 59

Page 2

CAUTION

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

The following caution label is located
inside of the unit.

CAUTION-

Laser radiation when open.
DO NOT STARE INTO BEAM.

For the customers in Canada

CAUTION

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.

For the customers in Europe

This appliance is classified as a CLASS 1
LASER product.

The CLASS 1 LASER PRODUCT
MARKING is located on the rear exterior.

CLASS1 LASER PRODUCT
LUOKAN I LASERLAITE

KLASS 1 LASERAPPARAT

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.

CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEAYED AVOID Exposunz To BEAM
ADVARSEL : USYNLIG LASERSTRALING VED AENINS NAR
SIKKERHEDSAFBRVDERE ER uDE AF FUNKlloN uNDaA UDSAETTELSE
FOR SYRALING

VORSICHT I uNsIcHTBARE LASERSTRAHLUNG.WENN
museums GEDFFNET um: SICHEREIYSVERRIEGELUNG
HEERefiucKT NIGHT DEM srRARL AUSSETZEN

: AvaEssA JA swan/mus OHIVEI'TAESSA otEr Atr

VAROl
TIINA NAKmm-roMALLE LASERSATEILYLLE ALA xnso SATEESEEN

VA R N I N G : ostLING LASERSYRALING NAR DENNA DEL AR OVPNAD
OCH SPARREN AR URKOPPLAD BETRAKrA Ed STRALEN

A DV E R S E L : USVNLIS LASERSTRALING NAR DEKSEL APNES oo
SIKKERHEDSIJS anwss umNeA EKSPONERINB FOR STRALEN

VI GVAZATJ : A EURKOLAT NVITASAKOR LATHATATLAN LEZERSUV
GARVESZELY KERULJE A BESUGARZAST

SAFETY-RELATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

SAFETY CHECK-OUT

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.

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 cha.. , must not exceed 0.5 mA (500 microamperes.).

Leakage current can be measured by any one of three methods.

I. A commercial leakage tester, such as the Simpson 229 or RCA

WT»540A. Follow the manufacturers instructions to use these

instruments.

A batteryeoperated 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 indicae
tion is 0.75 V, so analog meters must have an accurate low,
voltage scale. The Simpson 250 and Sanwa 8H763Trd are ex,
amples of a p ive VOM that ' suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit
able. (See Fig. A)

s

to

To Exposed Metal

Farts on Set
AC
0.15pF :: g 1.5 kg / yglgrgrefr

_T_ Eaflh Ground
Fig. A. Using an AC voltmeter to check AC leakage.

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 heatt

Flexible Circuit Board Repairing

' 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.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
SUR LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES SONT CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONv DONT LES
NUMERos SONT DONNES DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR SONY.