SERVICE MANUAL
BA-4C CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-24FV10
RM-Y168
US
SCC-S22A-A
KV-24FV10
RM-Y168
CND
SCC-S24A-A
KV-25FV10
RM-Y168
E
SCC-S23A-A
KV-25FV10C RM-Y168
E
SCC-S23C-A
TRINITRON® COLOR TV
9-965-853-02
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 3/1999
REVISION DATE
REVISION TYPE
SUBJECT
3/1999
No revisions or updates are applicable at this time.
7/2005
Updated schematics to improve critical shading
SERVICE MANUAL
BA-4C CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-24FV10
RM-Y168
US
SCC-S22A-A
KV-24FV10
RM-Y168
CND
SCC-S24A-A
KV-25FV10
RM-Y168
E
SCC-S23A-A
KV-25FV10C
RM-Y168
E
SCC-S23C-A
MICROFILM
TRINITRON® COLOR TV
RM-Y168
KV-24FV10
-- 2 --
KV-24FV10/25FV10/25FV10C
SPECIFICATIONS
Television system
American TV standard/NTSC
Channel coverage
VHF:2-13/UHF:14-69/CATV:1-125
Visible screen size
24" picture measured diagonally
Actual screen size
25" picture measured diagonally
Antenna
75 ohm external terminal for VHF/UHF
Supplied Accessories
Remote Commander RM-Y168 (all models)
Size AA (R6) batteries (2)
Optional Accessories
Dipole antenna
Connecting cables VMC-810S/820S, VMC-720M,
YC-15V/30V, RK74A
U/V mixer EAC-66
Design and specifications are subject to change without notice.
(
· ) SRS (SOUND RETRIEVAL SYSTEM)
The (
· ) SRS (SOUND RETRIEVAL SYSTEM) is
manufactured by Sony Corporation under license
from SRS Labs, Inc. It is covered by U.S. Patent No.
4,748,669. Other U.S. and foreign patents pending.
The word `SRS' and the SRS symbol (
· ) are
registered trademarks of SRS Labs, Inc.
BBE and BBE symbol are trademarks of BBE Sound,
Inc. and are licensed by BBE Sound, Inc. under U.S.
Patent No. 4,638,258 and 4,482,866.
KV-24FV10
KV-25FV10/10C
Power Requirements
120V, 60 Hz
Auto Volt (120220 VAC)
Number of inputs/outputs
Video Input (1)
22
S Video Input (2)
11
Audio Input (3)
22
Audio Output (4)
11
Speaker Output (W)
10W x 2
10W x 2
Power Consumption (W)
In Use (Max)
150W
150W
In Standby
1W
1W
Dimensions (W/H/D)
(mm)
652 x 524.3 x 467.3 mm
652 x 524.3 x 467.3 mm
(in)
25 3/4 x 2011/16 x 187/16 in
25 3/4 x 2011/16 x 18 7/16 in
Mass
(kg)
40 kg
40 kg
(lbs)
88 lbs. 3 oz.
88 lbs. 3 oz.
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)
500 mVrms (100% modulation), impedance: 47 kilohms
4)
More than 408 mVrms at the maximum volume setting (variable)
More than 408 mVrms (fix)
-- 3 --
KV-24FV10/25FV10/25FV10C
Section
Title
Page
Warnings and Cautions ............................................................................................................................................................... 4
Self-Diagnostic Function ............................................................................................................................................................. 4
Safety Check Out Instructions ..................................................................................................................................................... 7
1.
GENERAL ........................................................................................................................................................... 8
2.
DISASSEMBLY
2-1.
Rear Cover Removal ..................................................................................................................................................... 14
2-2.
A Board Removal .......................................................................................................................................................... 14
2-3.
Service Position ............................................................................................................................................................ 14
2-4.
Picture Tube Removal ................................................................................................................................................... 15
3.
SET-UP ADJUSTMENTS
3-1.
Beam Landing ............................................................................................................................................................... 16
3-2.
Convergence ................................................................................................................................................................. 17
3-3.
Focus ............................................................................................................................................................................. 18
3-4.
Screen (G2) ................................................................................................................................................................... 18
3-5.
Method of Setting the Service Adjustment Mode ......................................................................................................... 19
3-6.
White Balance Adjustments .................................................................................................. ........................................ 19
4.
SAFETY RELATED ADJUSTMENTS
4-1.
R582 and R584 Confirmation Method (HV Hold-Down Confirmation and Readjustments) ................................... 20
4-2.
B+ Voltage Confirmation and Adjustment ..................................................................................................................... 20
5.
CIRCUIT ADJUSTMENTS
5-1.
Setting the Service Adjustment Mode .......................................................................................................................... 22
5-2.
Memory Write Confirmation Method ............................................................................................................................. 22
5-3.
Adjustment Buttons and Indicators ............................................................................................................................... 22
5-4.
A Board Adjustments .................................................................................................................................................... 25
6.
DIAGRAMS
6-1.
Block Diagram ............................................................................................................................................................... 29
6-2.
Circuit Board Location ................................................................................................................................................... 32
6-3.
Printed Wiring Boards and Schematic Diagrams ......................................................................................................... 32
·
A Board .................................................................................................................................................................... 33
·
G Board .................................................................................................................................................................... 41
·
V Board .................................................................................................................................................................... 45
·
C Board .................................................................................................................................................................... 46
6-4.
Semiconductors ............................................................................................................................................................ 51
7.
EXPLODED VIEW
7-1.
Chassis .......................................................................................................................................................................... 52
8.
ELECTRICAL PARTS LIST ................................................................................................................................................ 53
TABLE OF CONTENTS
-- 4 --
KV-24FV10/25FV10/25FV10C
WARNINGS AND CAUTIONS
CAUTION
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.
WARNING!!
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.
SAFETY-RELATED COMPONENT WARNING!!
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.
ATTENTION
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.
ATTENTION!!
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.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
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.
SELF-DIAGNOSTIC FUNCTION
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.
Diagnostic Test Indicators
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".
Diagnostic Item
Description
No. of Times
STANDBY/TIMER
LED Flashes
Self-diagnostic Display/
Diagnostic Result
Probable Cause
Location
Detected Symptoms
Power does not turn on
Does not light
· Power cord is not plugged in.
· Fuse is burned out. (F600) (G 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)
· IC1751 is shorted. (C Board)
· Power does not come on.
· Load on power line is shorted.
Vertical deflection stopped*
4 times
4:0 or 4:1
· +13V is not supplied. (A Board)
· IC541 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 (IC541) is faulty. (A Board)
· IC301 is faulty. (A 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.