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MODEL

COMMANDER

DEST

CHASSIS NO.

RM-Y173

US

SCC-S40A-A

RM-Y173

CND

SCC-S41A-A

RM-Y168

US

SCC-S40B-A

RM-Y168

CND

SCC-S41B-A

RM-Y173

E

SCC-S38A-A

RM-Y173

E

SCC-S38F-A

RM-Y173

E

SCC-S38B-A

RM-Y172

MX

SCC-S39A-A

RM-Y168

E

SCC-S38C-A

RM-Y168

E

SCC-S38D-A

879 Front.p65

01/31/00, 3:10 PM

1

American TV standard/NTSC
PAL M, N (KV-21FE12A ONLY)

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

20” picture measured diagonally

21” picture measured diagonally

75 ohm external antenna terminal for VHF/UHF

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).

Remote Commander RM-Y168

 (KV-20FV12/21FV12/21FV12C  ONLY)

Remote Commander RM-Y172 

(KV-21FM12 ONLY)

Remote Commander RM-Y173 

(KV-20FS12/21FE12/21FE12A/21FE12C

 

ONLY)

Size AA (R6) batteries (2)

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

Power requirements 120-220V, 50/60 Hz 120-220V, 50/60 Hz 120V,60Hz 120V,60Hz 120-220V, 50/60 Hz 120-220V, 50/60 Hz
Number of inputs/outputs

Video 1) 2 2 2 2 2 2

S Video 2) 1 1 1 1 1 1

Audio 3) 2 2 2 2 2 2

Audio Out 4) -- -- -- 1 1 1

Speaker output(W) 5W x 2 3W x 2 3W x 2 5W x 2 10W x 2 10W x 2
Power Consumption(W)

In use(Max) 115W 115W 115W 150W 155W 150W

In standby 1W 1W 1W 1W 1W 1W

Dimensions(W/H/D)

(mm) 

512 x 475 x 493mm 512 x 475 x 493mm 512 x 475 x 493mm 562 x 466 x 503mm 562 x 466 x 503mm 562 x 466 x 503mm

(in) 

20 

1/8

 x 18 

11/16

 x 19 

7/16

20 

1/8

 x 18 

11/16

 x 19 

7/16

20 

1/8

 x 18 

11/16

 x 19 

7/16

22

 1/4

 x 18 

3/8

 x 19

 7/8

22 

1/4

 x 18 

3/8

 x 19 

7/8

22 

1/4

 x 18 

3/8

 x 19 

7/8

Mass

(kg) 24.5kg 

24.5kg 

24.5kg 

27 kg 27 kg 27 kg 

(lbs) 54 lbs 54 lbs  54 lbs 59 lbs. 8 oz. 59 lbs. 8 oz. 59 lbs. 8 oz.

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

1. GENERAL ........................................................................................................................................................... 8

2-1. Rear Cover Removal ..................................................................................................................................................... 13
2-2. Chassis Assembly Removal ......................................................................................................................................... 13
2-3. Service Position ............................................................................................................................................................ 13
2-4. Picture Tube Removal ................................................................................................................................................... 14

3-1. Beam Landing ............................................................................................................................................................... 15
3-2. Convergence ................................................................................................................................................................. 16
3-3. Focus ............................................................................................................................................................................. 17
3-4. Screen (G2) ................................................................................................................................................................... 17
3-5. Method of Setting the Service Adjustment Mode .............................................................................. ........................... 18
3-6. White Balance Adjustments .......................................................................................................................................... 18

4-1.

 R562 Confirmation Method (HV Hold-Down Confirmation and Readjustments) .................................................... 19

4-2. B+ Voltage Confirmation and Adjustment ..................................................................................................................... 19

5-1. Setting the Service Adjustment Mode .......................................................................................................................... 21
5-2. Memory Write Confirmation Method ............................................................................................................................. 21
5-3. Adjustment Buttons and Indicators ............................................................................................................................... 21
5-4. MB Board Adjustments ................................................................................................................................................. 23

6-1. Block Diagram ............................................................................................................................................................... 27
6-2. Circuit Board Location .................................................................................................................................................. 30
6-3. Printed Wiring Boards and Schematic Diagrams ......................................................................................................... 30

• A Board .................................................................................................................................................................... 31
• K Board .................................................................................................................................................................... 38
• MB Board ................................................................................................................................................................. 39
• CB Board .................................................................................................................................................................. 47
• VB Board .................................................................................................................................................................. 49
• HZ Board .................................................................................................................................................................. 50

6-4. Semiconductors ............................................................................................................................................................ 51

7-1. Chassis (KV-21FE12/C  ONLY) .................................................................................................................................... 52
7-2. Chassis (KV-21FE12A MODEL ONLY) ......................................................................................................................... 53
7-3. Chassis (KV-20FV12/21FV12/C  ONLY) ....................................................................................................................... 54
7-4. Chassis (KV-20FS12/21FM12  ONLY) .......................................................................................................................... 55

................................................................................................................................................. 56

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”.

Power does not turn on Does not light

• Power cord is not plugged in.

• Fuse is burned out. (F601) (A Board)

• Power does not come on.

• No power is supplied to the TV.

• AC power supply is faulty.

+B overcurrent (OCP)* 2 times 

2:0 or 2:1 

• H.OUT (Q502) is shorted. (A Board)

• IC702 is shorted. (CB Board)

• Power does not come on.

• Load on power line is shorted.

Vertical deflection stopped* 4 times 

4:0 or 4:1  • +12V is not supplied. (A Board)

• IC502 is faulty. (A Board)

• Has entered standby state after horizontal raster.

• Vertical deflection pulse is stopped.

• Power line is shorted or power supply is stopped.

White balance failure
(not balanced)

5 times 5:0 or 5:1 

• Video OUT (IC502) is faulty. (A Board)

• IC1301 is faulty. (MB Board)

• Screen (G2) is improperly adjusted.**

• No raster is generated.

• CRT cathode current detection reference

pulse output is small.

* If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.

The symptom that is diagnosed first by the microcontroller is displayed on the screen.

** Refer to Screen (G2) Adjustments in Section 3-4 of this manual.