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SERVICE MANUAL
AE- 4 CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-28WF3A RM-862 Italian SCC-K43L-A
KV-28WF3B RM-862 French SCC-K45N-A
KV-28WF3D RM-862 AEP
SCC-K41N-A
KV-28WF3E RM-862 Spanish SCC-K42L-A
KV-28WF3K RM-862 OIRT SCC-K44M-A
KV-32WF3A RM-862 Italian SCC-K43K-A
KV-32WF3B RM-862 French SCC-K45M-A
KV-32WF3D RM-862 AEP
SCC-K41M-A
KV-32WF3E RM-862 Spanish SCC-K42K-A
KV-32WF3K RM-862 OIRT SCC-K44L-A
®
MICR OFILM
TRINITRON® COLOR TV


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KV-28WF3/32WF3
ITEM MODEL
Television System
Stereo System
Channel Coverage
Color System
Italian
B/G/H, D/K
GERMAN Stereo
ITALIA VHF : A-H2 (C) UHF : 21-69 PAL
B/G/H VHF : E2-E12 UHF : E21-E69
CABLE TV (1) : S1-S41
CABLE TV (2) : S01-S05, M1-M10, U1-U10
PAL
NTSC4.43, NTSC3.58
(VIDEO IN)
French
B/G/H, D/K, L, I
GERMAN/NICAM
Stereo
L VHF : F02-F10 UHF : F21-F60
CABLE : B-Q B/G/H VHF : E2-E12
UHF : E21-E69
CABLE TV (1) : S1-S41
CABLE TV (2) : S01-S05, M1-M10, U1-U10
ITALIA VHF : A-H2 (C) UHF : 21-69
I UHF : B21-B69
PAL, SECAM
NTSC4.43, NTSC3.58
(VIDEO IN)
AEP
B/G/H, D/K
GERMAN Stereo
PAL B/G/H VHF : E2-E12 UHF : E21-E69
CABLE TV (1) : S1-S41
CABLE TV (2) : S01-S05, M1-M10, U1-U10
ITALIA VHF : A-H2 (C) UHF : 21-69
D/K VHF : R01-R12 UHF : R21-R69
PAL, SECAM
NTSC4.43, NTSC3.58
(VIDEO IN)
Spanish
B/G/H, D/K
GERMAN/NICAM
Stereo
PAL B/G VHF : E2-E12 UHF : E21-E69
CABLE TV (1) : S1-S41
CABLE TV (2) : S01-S05, M1-M10, U1-U10
ITALIA VHF : A-H2 (C) UHF : 21-69
D/K VHF : RO1-R20 UHF : B21-B69
PAL, SECAM
NTSC4.43, NTSC3.58
(VIDEO IN)
OIRT
B/G/H, D/K
GERMAN/NICAM
STEREO
PAL B/G/H VHF : E2-E12 UHF : E21-E69
CABLE TV (1) : S1-S41
CABLE TV (2) : S01-S05, M1-M10, U1-U10
ITALIA VHF : A-H2 (C) UHF : 21-69
D/K VHF : R01-R12 UHF : R21-R69
MODEL
28WF3A
28WF3B
28WF3D
28WF3E
28WF3K
32WF3A
32WF3B
32WF3D
32WF3E
32WF3K
Power Consumption
108 W
119 W
119 W
119 W
119 W
118 W
132 W
132 W
132 W
132 W
[PICTURE TUBE]
KV-28WF3
Super Trinitron
Approx. 71cm (28 inches)
(Approx. 66cm picture measured
diagonally)
110 degree deflection
KV-32WF3
Super Trinitron
Approx. 82cm (32 inches)
(Approx. 76cm picture measured
diagonally)
110 degree deflection
Input/Output Terminals
[REAR]
1
21-pin Euro connector (CENELEC standard).
-
Inputs for Audio and Video signals.
-
Inputs for RGB.
-
Outputs of TV Video and Audio signals.
21-pin Euro connector.
-
inputs for Audio and Video signals.
-
inputs for S Video.
-
outputs for Audio and Video signals (selectable).
Phono Jack
-
Outputs for Audio Signals
[FRONT]
Video input - phono jack
Audio inputs - phono jacks
S Video input 4 pin DIN
Headphone jacks : stereo minijack
Sound output
2 x 20W (Music Power)
Power requirements
220 - 240V
Dimensions
KV-28WF3
Approx 690x535x534mm
KV-32WF3
Approx 789x602x576mm
Weight
KV-28WF3
Approx 38kg
KV-32WF3
Approx 55.5kg
Supplied accessories
RM-862 Remote Commander (1)
IEC designated R6 battery (2)
Other features
DNR (Digital Noise Reduction),
Digital Plus.
NICAM*, FASTEXT, TOPTEXT
*(KV-28WF3B/28WF3E/28WF3K/
32WF3B/32WF3E/32WF3K only)
[RM-862]
Remote control system
infrared control
Power requirements
3V dc (2 Batteries) R6 (Size AA)
Dimensions
Approx 210x56x24mm (w/h/d)
Weight
Approx 110g (Not including battery)


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KV-28WF3/32WF3
Model Name
Item
KV-28WF3A
KV-32WF3A
KV-28WF3B
KV-32WF3B
KV-28WF3D
KV-32WF3D
KV-28WF3E
KV-32WF3E
KV-28WF3K
KV-32WF3K
Pal Comb
OFF
OFF
OFF
OFF
OFF
PIP
OFF
OFF
OFF
OFF
OFF
RGB Priority
OFF
OFF
OFF
ON
OFF
Woofer Box
OFF
OFF
OFF
OFF
OFF
Scart 1
ON
ON
ON
ON
ON
Scart 2
ON
ON
ON
ON
ON
Front in (3)
ON
ON
ON
ON
ON
Scart 4
OFF
OFF
OFF
OFF
OFF
Projector
OFF
OFF
OFF
OFF
OFF
AKB in 16:9 mode
ON
ON
ON
ON
ON
Norm B/G/H
ON
ON
ON
ON
ON
Norm I
OFF
ON
OFF
OFF
OFF
Norm D/K
ON
ON
ON
ON
ON
Norm AUS
OFF
OFF
OFF
OFF
OFF
Norm L
OFF
ON
OFF
OFF
OFF
Norm SAT
OFF
OFF
OFF
OFF
OFF
Norm M
OFF
OFF
OFF
OFF
OFF
Teletext
ON
ON
ON
ON
ON
Nicam Stereo
OFF
ON
OFF
ON
ON
Language Preset
Italian
French
German
Spanish
OIRT


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KV-28WF3/32WF3
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
Pin No
Signal
Signal level
1
Ground
2
Ground
3
Y (S signal) input
1V+/- 3dB 75 ohm, positive Sync 0.3V -3/+10dB
4
C (S signal) input
0.3V+/- 3dB 75 ohm, positive Sync
Pin No
1
2
4
Signal
Signal level
1
Audio output B
(right)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
2
Audio output B
(right)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
3
Audio output A
(left)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
4
Ground (audio)
5
Ground (blue)
6
Audio input A
(left)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
7
Blue input
0.7 +/- 3dB, 75 ohms positive
8
Function select
(AV control)
High state (9.5-12V) : Part mode
Low state (0-2V) : TV mode
Input impedence : More than 10K ohms
Input capacitance : Less than 2nF
9
Ground (green)
10
Open
11
Green
Green signal : 0.7 +/- 3dB, 75 ohms,
positive
12
Open
13
Ground (red)
14
Ground (blanking)
15
_
_
Red input
0.7 +/- 3dB, 75 ohms, positive
_
(S signal Chroma
input)
0.3 +/- 3dB, 75 ohms, positive
16
Blanking input
(Ys signal)
High state (1-3V) Low state (0-0.4V)
Input impedence : 75 ohms
17
Ground (video
output)
18
Ground (video
input)
19
Video output
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
20
_
_
Video input
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
_
Video input
Y (S signal)
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
21
Common ground
(plug, shield)
21 pin connector (1
,
2 /
2 )
Connected
Not Connected (open)
* at 20Hz - 20kHz


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KV-28WF3/32WF3
TABLE OF CONTENTS
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE
CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE
ANODE CAP
WARNING !!
AN ISOLATING TRANSFORMER SHOULD BE USED DURING ANY
SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD DUE TO
LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY
CONNECTED TO THE POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARKED
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.
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE'LANODE,
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 RISQUE D'ELECTROCUTION PROVENANT
D'UN CHÁSSIS SOUS TENTION, UN TRANSFORMATEUR
D'ISOLEMENT DOIT ETRE UTILISÈ LORS DE TOUT DÈPANNAGE.
LE CHÁSSIS DE CE RÈCEPTEUR EST DIRECTMENT RACCORDÈ
Á L'ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS Á LA
SÈCURITÈ !!
LES COMPOSANTS IDENTIFIÈS PAR UNE TRAME ET PAR UNE
MARQUE
SUR LES SCHÈMAS DE PRINCIPE, LES VUES
EXPLOSÈES ET LES LISTES DE PIECES SONT D'UNE IMPORTANCE
CRITIQUE POUR LA SÈCURITÈ DU FONCTIONNEMENT, NE LES
REMPLACER QUE PAR DES COMPSANTS SONY DONT LE NUMÈRO
DE PIÈCE EST INDIQUÈ DANS LE PRÈSENT MANUEL OU DANS
DES SUPPLÈMENTS PUBLIÈS PAR SONY.
Section
Title
Page
Section
Title
Page
1. GENERAL
Overview
.....................7
Basic Operation
.....................8
Advanced Operation
.....................9
Teletext Operation
.....................13
Optional Equipment
.....................15
Additional Information
.....................16
2. DISASSEMBLY
2-1.
Rear Cover Removal
.....................17
2-2.
Chassis Assy Removal
.....................17
2-3.
Service Position
.....................17
2-4.
G Board Removal
.....................17
2-5.
A Board Removal
.....................18
2-6.
Picture Tube Removal
.....................18
2-7.
Removal and Replacement of the
Main Bracket Bottom Plates
.....................19
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing
.....................20
3-2.
Convergence
.....................21
3-3.
Focus
.....................23
3-4.
Screen [G2] White Balance
.....................23
(Adjustment in the service mode
with remote commander)
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
.....................24
4-2.
Volume Electrical Adjustments
.....................28
4-3.
Test mode 2:
.....................29
5. DIAGRAMS
5-1.
Block Diagram (1)
.....................31
Block Diagram (2)
.....................34
Block Diagram (3)
.....................35
Block Diagram (4)
.....................37
Block Diagram (5)
.....................39
Block Diagram (6)
.....................42
5-2.
Circuit Board Location
.....................43
5-3.
Schematic Diagrams and
Printed Wiring Boards
.....................43
*
A Board
.....................47
*
C Board
.....................57
*
D Board
.....................63
*
G Board
.....................67
*
VM Board
.....................71
*
B Board
.....................79
5-4.
Semiconductors
.....................87
5-5.
IC Blocks
.....................90
6. EXPLODED VIEWS
6-1.
Chassis
.....................91
6-2.
Picture Tube
.....................92
7. ELECTRICAL PARTS LIST
.....................94