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TRINITRON® COLOR TELEVISION
SERVICE MANUAL
BA-4DCHASSIS
MODEL NAME
REMOTE COMMANDER
DESTINATION
CHASSIS NO.
9-965-858-02
KV-27V42
RM-Y165
US
SCC-S27M-A
KV-27V66
RM-Y167
US
SCC-S27J-A
KV-27V66
RM-Y167
CND
SCC-S28H-A
KV-29SL42K
RM-Y149A
KOREA
SCC-S29A-A
KV-29SL42T
RM-Y165
TAIWAN
SCC-S30A-A
KV-29VL42T
RM-Y165
TAIWAN
SCC-S30B-A
KV-29XL42T
RM-Y165
TAIWAN
SCC-S30C-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 4/1999
REVISION DATE
REVISION TYPE
SUBJECT
4/1999
No revisions or updates are applicable at this time.
9/2003
Added Connection Point to A Board Schematic (Replaced Pg. 31, 32, 33, & 34)
Added History Information page (Added Pg. 1)
Updated last page to reflect new service manual part number (Replaced last page)


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SERVICE MANUAL
BA-4D CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-27V42
RM-Y165
US
SCC-S27M-A
KV-27V66
RM-Y167
US
SCC-S27J-A
KV-27V66
RM-Y167
CND
SCC-S28H-A
KV-29SL42K
RM-Y149A
KOREA
SCC-S29A-A
KV-29SL42T
RM-Y165
TAIWAN
SCC-S30A-A
KV-29VL42T
RM-Y165
TAIWAN
SCC-S30B-A
KV-29XL42T
RM-Y165
TAIWAN
SCC-S30C-A
MICROFILM
TRINITRON® COLOR TV
RM-Y149A
KV-29SL42K


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KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
KV-27V42,
KV-29SL42T
KV-27V66
KV-29SL42K
KV-29VL42T,
KV-29XL42T
Power Requirements
120V, 60Hz
120V, 60Hz
AUTO VOLT
120-220V,
50-60Hz
120V, 60Hz
Number of inputs/outputs
Video 1)
3322
S-Video Input 2)
1111
Audio Input 3)
3322
Audio Out 4)
1111
Speaker Output (W)
5WX2
10WX2
5WX2
5WX2
Power Consumption (W)
In Use (Max)
140W
180W
140W
140W
In Standby
2W
2W
2W
2W
Dimensions (W/H/D)
(mm)
690 x 575.4 x 503.4 mm
690 x 575.4 x 503.4 mm
690 x 575.4 x 503.4 mm
690 x 575.4 x 503.4 mm
(in)
271/4 x22
3/
4 x19
7/
8 in.
271/4 x22
3/
4 x19
7/
8 in.
271/4 x22
3/
4 x19
7/
8 in.
271/4 x22
3/
4 x19
7/
8 in.
Mass
(kg)
42.4kg
42.4kg
42.4kg
42.4kg
(lbs)
93 lbs. 8oz
93 lbs. 8oz
93 lbs. 8oz
93 lbs. 8oz
1) 1 Vp-p 75 ohms unbalanced, sync negative
2) Y: 1Vp-p 75 ohms unbalanced, sync negative.
C: 0.286 Vp-p (Burst signal), 75 ohms
3) 500mVrms (100% modulation), impedance:47 kilohms
4) More than 408 mVrms at the maximum volume setting
(variable) More than 408 mVrms (fix), Impedance: 5 kilohms
SPECIFICATIONS
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.
Television system
American TV standard/NTSC
Picture Tube
Trinitron® tube
Channel coverage
VHF:2-13/UHF:14-69/CATV:1-125
Visible screen size
27" picture measured diagonally
Actual screen size
29" picture measured diagonally
Antenna
75 ohm external terminal for VHF/UHF
Supplied Accessories
Remote Commander (RM-Y165) (KV-27V42/29SL42T/29VL42T/29XL42T)
Remote Commander (RM-Y167) (KV-27V66)
Remote Commander (RM-Y149A) (KV-29SL42K)
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


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KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
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 (KV-27V42/66/29VL42T) .............................................................................................................. 11
2-2.
Rear Cover Removal (KV-29SL42K/42T/29XL42T) ........................................................................................................ 11
2-3.
Board Removal ............................................................................................................................................................... 12
2-4.
Control Switch Removal ................................................................................................................................................. 12
2-5.
Service Position ............................................................................................................................................................. 12
2-6.
Picture Tube Removal .................................................................................................................................................... 13
3.
SET-UP ADJUSTMENTS
3-1.
Beam Landing ................................................................................................................................................................ 14
3-2.
Convergence .................................................................................................................................................................. 15
3-3.
Focus ............................................................................................................................................................................. 16
3-4.
Screen (G2) ................................................................................................................................................................... 16
3-5.
Method of Setting the Service Adjustment Mode ............................................................................................................. 16
3-6.
White Balance Adjustments ........................................................................................................................................... 16
4.
SAFETY RELATED ADJUSTMENTS
4-1.
R584 Confirmation Method (HV Hold-Down Confirmation and Readjustments) .........................................................17
4-2.
B+ Voltage Confirmation and Adjustment ........................................................................................................................ 17
5.
CIRCUIT ADJUSTMENTS
5-1.
Setting the Service Adjustment Mode ............................................................................................................................. 19
5-2.
Memory Write Confirmation Method ............................................................................................................................... 19
5-3.
Adjust Buttons and Indicators ......................................................................................................................................... 19
5-4.
A Board Adjustments ..................................................................................................................................................... 22
6.
DIAGRAMS
6-1.
Block Diagram ............................................................................................................................................................... 23
6-2.
Circuit Board Location .................................................................................................................................................... 26
6-3.
Printed Wiring Boards and Schematic Diagrams ............................................................................................................ 26
·
A Board ..................................................................................................................................................................... 27
·
P Board ..................................................................................................................................................................... 35
·
K Board ..................................................................................................................................................................... 36
·
HV Board .................................................................................................................................................................. 37
·
E Board ..................................................................................................................................................................... 39
·
C Board ..................................................................................................................................................................... 40
·
CV Board .................................................................................................................................................................. 41
6-4.
Semiconductors ............................................................................................................................................................. 43
7.
EXPLODED VIEW
7-1.
Chassis (KV-29SL42K/42T/XL42T) ............................................................................................................................... 44
7-2.
Chassis (KV-27V42/V66/29VL42T) ................................................................................................................................45
8.
ELECTRICAL PARTS LIST ................................................................................................................................................. 46
TABLE OF CONTENTS


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KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
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 F5050 is burned out (E 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 (C board) or IC 1701(CV Board)
are shorted.
· 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 (Q306 to 308) 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.