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MODEL

COMMANDER

DEST

CHASSIS NO.

RM-Y168

E

SCC-S38T-A

892 Front.p65

6/7/00, 11:23 AM

1

PAL-M,PAL-N,NTSC

VHF:2-13/UHF:14-69/CATV:1-125

27” picture measured diagonally

29” picture measured diagonally

75 ohm external antenna terminal for VHF/UHF

Remote Commander RM-Y168
Size AA (R6) batteries (2)

Connecting cables: VMC-810S/820S, VMC-720M,
YC-15V/30V, RK74A
U/V mixer EAC-66

1)

1 Vp-p 75 ohms unbalanced, sync negative

2)

Y: 1 Vp-p 75 ohms unbalanced, sync negative

C: 0.286  Vp-p (Burst signal), 75 ohms

3)

500mVrms (100% modulation), impedance: 47kilohms

4)

More than 408 mVrms at the maximum volume setting (variable)

More than 408 mVrms (fix)

5)

Y: 1.0 Vp-p, 75 ohms, sync negative; P

B

: 0.7 Vp-p, 75 ohms;

P

R

: Vp-p, 75 ohms

120V/220V, 60Hz/50Hz

Video 

1)

3

S Video 

2)

1

Audio 

3)

3

Audio Out 

4)

1

Y, P

B

, P

R  

5)

1

10Wx2

In use(Max)

185W

In standby

1W

(mm)

700  x 632 x 512 mm.

(in)

27 

1/2

 x 24 

7/8

 x 20 

1/6

 in.

(kg)

47kg

(lbs)

103 lbs. 10 oz.

Warnings and Cautions ....................................................................................................................................... 4
Self-Diagnostic Function ...................................................................................................................................... 4
Safety Check-Out Instructions .............................................................................................................................. 7

GENERAL ........................................................................................................................................................... 8

2-1.

Rear Cover Removal ............................................................................................................................... 14

2-2.

Chassis Assembly Removal ..................................................................................................................... 14

2-3.

Service Position ...................................................................................................................................... 14

2-4.

Picture Tube Removal ............................................................................................................................. 15

3-1.

Beam Landing ......................................................................................................................................... 16

3-2.

Convergence .......................................................................................................................................... 17

3-3.

Focus ...................................................................................................................................................... 18

3-4.

Screen (G2) ............................................................................................................................................ 19

3-5.

Method of Setting the Service Adjustment Mode ..................................................................................... 19

3-6.

White Balance Adjustments .................................................................................................................... 19

4-1.

 R564 Confirmation Method (HV Hold-Down Confirmation and Readjustments) ................................. 20

4-2.

B+ Voltage Confirmation and Adjustment ................................................................................................ 20

5-1.

Setting the Service Adjustment Mode ...................................................................................................... 22

5-2.

Memory Write Confirmation Method ........................................................................................................ 22

5-3.

Adjustment Buttons and Indicators .......................................................................................................... 22

5-4.

MA Board Adjustments ............................................................................................................................ 26

6-1.

Block Diagram ......................................................................................................................................... 31

6-2.

Circuit Board Location ............................................................................................................................. 37

6-3.

Printed Wiring Boards and Schematic Diagrams ..................................................................................... 37
• A Board .............................................................................................................................................. 38
• MA Board ............................................................................................................................................ 45
• HX Board ............................................................................................................................................ 49
• CA Board ............................................................................................................................................ 51
• HZ Board ............................................................................................................................................ 52
• K Board .............................................................................................................................................. 53
• VA Board ............................................................................................................................................ 54
• D Board .............................................................................................................................................. 55

6-4.

Semiconductors ...................................................................................................................................... 57

7-1.

Chassis ................................................................................................................................................... 58

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

59

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE
AND THE ANODE CAP TO THE METAL CHASSIS, CRT
SHIELD, OR CARBON PAINTED ON THE CRT, AFTER
REMOVING THE ANODE.

AN ISOLATION TRANSFORMER SHOULD BE USED
DURING ANY SERVICE TO AVOID POSSIBLE SHOCK
HAZARD, BECAUSE OF LIVE CHASSIS. THE CHASSIS
OF THIS RECEIVER IS DIRECTLY CONNECTED TO THE
AC POWER LINE.

COMPONENTS IDENTIFIED BY SHADING AND MARK

 ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS,

AND IN THE PARTS LIST ARE CRITICAL FOR SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED
OR IMPROPER OPERATION IS SUSPECTED.

APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-CIRCUITER
L'ANODE DU TUBE CATHODIQUE ET CELUI DE L'ANODE DU CAP AU
CHASSIS METALLIQUE DE L'APPAREIL, OU AU COUCHE DE CARBONE
PEINTE SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE
CATHODIQUE.

AFIN D'EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT D'UN
CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR D'ISOLEMENT DOIT ETRE
UTILISÉ LORS DE TOUT DÉPANNAGE. LE CHÁSSIS DE CE RÉCEPTEUR EST
DIRECTEMENT RACCORDÉ À L'ALIMENTATION SECTEUR.

LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE MARQUE

 SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES

LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS
LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES PAR SONY.
LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR
LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE
REMPLACEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN
MAUVAIS FONTIONNEMENT SUSPECTE.

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash
indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote
Commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.

When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is
more than one error, the LED will identify the first of the problem areas.

Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.