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1
SERVICE MANUAL
GE-1A CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-28DS65U RM-892 UK
SCC-Q71D-A
KV-32DS65U RM-892 UK SCC-Q71C-A
®
TRINITRON ® COLOR TV


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2
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 IMPOR
TANCE 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
Specifications
.....................3
Warning and Caution
.....................4
Connectors
.....................5
Self-Diagnostic Function
.....................6
1. GENERAL
Quick Start Guide
.....................9
Overview
.....................10
Additional TV Features
.....................11
Teletext
.....................17
Event Schedule Guide
.....................19
Specifications
.....................20
Troubleshooting
.....................20
2. DISASSEMBLY
2-1.
Rear Cover Removal
.....................21
2-2.
Chassis Assy Removal
.....................21
2-3.
Service Position
.....................21
2-4.
A1 Board Removal
.....................21
2-5.
J Board Removal
.....................22
2-6.
B Board Removal
.....................22
2-7.
D1 Board Removal
.....................22
2-8.
H Bracket Removal
.....................22
2-9.
Picture Tube Removal
.....................23
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing
.....................24
3-2.
Convergence
.....................25
3-3.
Focus
.....................27
3-4.
Screen [G2] White Balance
.....................27
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
.....................29
4-3.
Test Mode 2
.....................31
5. DIAGRAMS
5-1.
Block Diagram (1)
.....................33
Block Diagram (2)
.....................35
Block Diagram (3)
.....................37
Block Diagram (4)
.....................39
Block Diagram (5)
.....................41
Block Diagram (6)
.....................43
Block Diagram (7)
.....................45
Block Diagram (8)
.....................47
5-2.
Circuit Board Location
.....................49
5-3.
Schematic Diagrams and
Printed Wiring Boards
.....................49
*
C Board
.....................51
*
H Board
.....................53
*
D2 Board
.....................53
*
A Board
.....................59
*
B Board
.....................68
*
A1 Board
.....................77
*
D Board
.....................83
*
D1 Board
.....................86
*
N Board
.....................93
*
F1 Board
.....................105
*
VM Board
.....................105
*
J Board
.....................108
5-4.
Semiconductors
.....................111
5-5.
IC Blocks
.....................114
6. EXPLODED VIEWS
6-1.
Chassis
.....................116
6-2.
Picture Tube
.....................117
7. ELECTRICAL PARTS LIST
.....................118


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3
ITEM MODEL
Television System
Stereo System
Channel Coverage
Color System
UK
I
NICAM Stereo
UHF : B21-B69
PAL
NTSC4.43, NTSC3.58
(VIDEO IN)
MODEL
28DS65U
32DS65U
Power Consumption
200W
200W
[PICTURE TUBE]
KV-28DS65
FD Trinitron WIDE
Approx. 71 cm (28 inches)
(Approx. 66cm picture measured
diagonally)
102 degree deflection
KV-32DS65
FD Trinitron WIDE
Approx. 82 cm (32 inches)
(Approx. 76 cm picture measured
diagonally)
102 degree deflection
Input/Output Terminals
[REAR]
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 forVideo and Audio signals (selectable).
21-pin Euro connector
-
Inputs for Audio and Video signals.
-
Inputs for S video.
[FRONT]
3 Video output - phono jack
3 Audio inputs - phono jacks
3 S Video input - 4 pin DIN
Headphone jack : stereo minijack
Sound output
2x30W (Music Power)
Power requirements
220 - 240V
Dimensions
KV-28DS65
Approx 773 x 501 x 526 mm (w/h/d)
KV-32DS65
Approx 867 x 564 x 558 mm (w/h/d)
Weight
KV-28DS65
Approx 56.5kg
KV-32DS65
Approx 68.5kg
Supplied accessories
RM-892 Remote Commander (1)
IEC designated R6 batteries (2)
Other features
NICAM, DNR, Dolby Digital
Surround System, Graphic Equalizer,
TELETEXT, Smartlink
[RM-892]
Remote control system
Infrared control
Power requirements
3V dc
2 batteries IEC designation
R6 (size AA)
Dimensions
Approx 210x56x24mm (w/h/d)
Weight
Approx 110g (Not including battery)
Design and specifications are subject to change without notice.
1
2
S
3
S


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4
WARNING
The flexible mains lead is supplied connected to a B.S. 1363 fused plug
having a fuse of 5 AMP capacity. Should the fuse need to be replaced,
use a 5 AMP FUSE approved by ASTA to BS 1362, ie one that carries the
mark.
IF THE PLUG SUPPLIED WITH THIS APPLIANCE IS NOT SUITABLE
FOR THE OUTLET SOCKETS IN YOUR HOME, IT SHOULD BE CUT
OFF AND AN APPROPRIATE PLUG FITTED. THE PLUG SEVERED
FROM THE MAINS LEAD MUST BE DESTROYED AS A PLUG WITH
BARED WIRES IS DANGEROUS IF ENGAGED IN A LIVE OUTLET
SOCKET.
When an alternative type of plug is used it should be fitted with a 5 AMP
FUSE, otherwise the circuit should be protected by a 5 AMP FUSE at the
distribution board.
ASA
T
How to replace the fuse.
Open the fuse compartment with
a screwdriver blade and replace
the fuse.
FUSE
Model Name
Item
KV-28DS65U
KV-32DS65U
Pal Comb
ON
ON
PIP
OFF
OFF
RGB Priority
ON
ON
Woofer Box
ON
ON
Scart 1
ON
ON
Scart 2
ON
ON
Front in (3)
ON
ON
Scart 4
ON
ON
Projector
OFF
OFF
AKB in 16:9 mode
ON
ON
Norm B/G
OFF
OFF
Norm I
ON
ON
Norm D/K
OFF
OFF
Norm AUS
OFF
OFF
Norm L
OFF
OFF
Norm SAT
OFF
OFF
Norm M
OFF
OFF
Teletext
ON
ON
Nicam Stereo
ON
ON
Language Preset
English
English


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5
21 pin connector
Connected
Not Connected (open) * at 20Hz - 20kHz
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)
R/D/D/D
L/G/S/I
2
S
2
1
4
S
4
1/
R/D/
D/D
L/G/
S/I
C
S
S
MODEM
....
L/G/S/I
R/D/D/D
S
3
3
3
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
Signal
Ground
Ground
Y (S signal) input
C (S signal) input
Pin No.
1
2
3
4
Signal Level
1V
3dB 75 ohm, positive Sync. 0.3V -3 + 10dB
0.3V
3dB 75 ohm, positive Sync.