SERVICE MANUAL
FE-1A CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
MODEL
COMMANDER
DEST
CHASSIS NO.
1
®
TRINITRON® COLOR TV
KV-25FX20A RM-887 Italian SCC-Q32B-A
KV-25FX20B RM-887 French SCC-Q33B-A
KV-25FX20D RM-887 AEP SCC-Q31B-A
KV-25FX20E RM-887 Spanish SCC-Q34B-A
KV-25FX20K RM-887 OIRT SCC-Q36C-A
KV-25FX20R RM-887 OIRT SCC-Q36D-A
KV-29FX20A RM-887 Italian SCC-Q32A-A
KV-29FX20B RM-887 French SCC-Q33A-A
KV-29FX20D RM-887 AEP SCC-Q31A-A
KV-29FX201DRM-887 AEP SCC-Q31E-A
KV-29FX20E RM-887 Spanish SCC-Q34A-A
KV-29FX201E RM-887 ESP SCC-Q34E-A
KV-29FX20K RM-887 OIRT SCC-Q36B-A
KV-29FX20R RM-887 OIRT SCC-Q36A-A
KV-29FX20U RM-887 UK
SCC-Q35A-A
MICR OFILM
2
ITEM MODEL
Television System
Stereo System
Channel Coverage
Color System
Italian
B/G/H
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, SECAM
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
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
PAL, SECAM
NTSC4.43, NTSC3.58
(VIDEO IN)
OIRT
B/G/H, D/K
KV-25FX20K/29FX20K
GERMAN/NICAM
Stereo
KV-25FX20R/29FX20R
GERMAN Stereo
B/G/H VHF : E2-E12 UHF : E21-E69
CABLE TV (1) : S1-S41
D/K VHF : R01-R12 UHF : R21-R69
PAL, SECAM
NTSC4.43, NTSC3.58
(VIDEO IN)
UK
I
NICAM Stereo
UHF : B21-B69
PAL
NTSC4.43, NTSC3.58
(VIDEO IN)
MODEL
25FX20A
25FX20B
25FX20D
25FX20E
25FX20K
25FX20R
Power Consumption
100W
100W
100W
100W
100W
100W
MODEL
29FX20A
29FX20B
29FX20D
29FX20E
29FX20K
29FX20R
29FX20U
Power Consumption
120W
120W
120W
120W
120W
120W
150W
[PICTURE TUBE]
KV-25FX20
FD Trinitron
Approx. 63cm (25 inches)
(Approx. 59cm picture measured
diagonally)
110 degree deflection
KV-29FX20
FD Trinitron
Approx. 72cm (29 inches)
(Approx. 68cm picture measured
diagonally)
110 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 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 14W (Music Power)
Subwoofer
30W (Music Power)
Power requirements
220 - 240V
Dimensions
KV-25FX20
Approx 655x509x476mm (w/h/d)
KV-29FX20
Approx 746x569x516mm (w/h/d)
Weight
KV-25FX20
Approx 37kg
KV-29FX20
Approx 47.5kg
Supplied accessories
RM-887 Remote Commander (1)
IEC designated R6 battery (2)
Other features
NICAM*, FASTEXT, TOPTEXT
*(KV-25FX20B/25FX20E/25FX20K/
KV-29FX20B/29FX20E/29FX20K/
KV-29FX20U only)
2
3
Model Name
Item
KV-25FX20A
KV-29FX20A
KV-25FX20B
KV-29FX20B
KV-25FX20D
KV-29FX20D
KV-25FX20E
KV-29FX20E
KV-25FX20K
KV-29FX20K
KV-25FX20R
KV-29FX20R
KV-29FX20U
Pal Comb
OFF
OFF
OFF
OFF
OFF
OFF
OFF
PIP
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RGB Priority
OFF
ON
ON
ON
OFF
OFF
OFF
Woofer Box
ON
ON
ON
ON
ON
ON
ON
Scart 1
ON
ON
ON
ON
ON
ON
ON
Scart 2
ON
ON
ON
ON
ON
ON
ON
Front in (3)
ON
ON
ON
ON
ON
ON
ON
Scart 4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Projector
OFF
OFF
OFF
OFF
OFF
OFF
OFF
AKB in 16:9 mode
ON
ON
ON
ON
ON
ON
ON
Norm B/G
ON
ON
ON
ON
ON
ON
OFF
Norm I
OFF
ON
OFF
OFF
OFF
OFF
ON
Norm D/K
OFF
ON
OFF
ON
ON
ON
OFF
Norm AUS
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Norm L
OFF
ON
OFF
OFF
OFF
OFF
OFF
Norm SAT
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Norm M
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Teletext
ON
ON
ON
ON
ON
ON
ON
Nicam Stereo
OFF
ON
OFF
ON
ON
OFF
ON
Language Preset
Italian
French
German
Spanish
OIRT
OIRT
English
[RM-887]
Remote control system
Infrared control
Power requirements
3V dc
2 batteries IEC designation
R6 (size AA)
Dimensions
Approx 44x209x23mm (w/h/d)
Weight
Approx 89g (Not including battery)
Design and specifications are subject to change without notice.
WARNING (KV-29FX20U only)
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
4
21 pin connector (
1/
,
2 /
)
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)
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.
5
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
Warning and Caution
.....................3
FE-1A Self Diagnostic Software
.....................6
1. GENERAL
Overview of Remote
.....................7
Control Buttons
Manually Tuning the TV
.....................7
Fine Tuning Channels
.....................8
Adjusting the Picture
.....................8
Adjusting the Sound
.....................9
Using the Sleep Timer
.....................9
Viewing Teletext
.....................10
Using Optional Equipment
.....................10
Troubleshooting
.....................11
Specifications
.....................11
2. DISASSEMBLY
2-1.
Rear Cover Removal
.....................12
2-2.
Chassis Assy Removal
.....................12
2-3.
Service Position
.....................13
2-4.
H Board Removal
.....................13
2-5.
S1 Board Removal
.....................13
2-6.
Picture Tube Removal
.....................14
2-7.
Removal and Replacement of
.....................15
the Main - Bracket bottom plates
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing
.....................16
3-2.
Convergence
.....................17
3-3.
Focus
.....................19
3-4.
White Balance
.....................19
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
.....................20
4-2.
Test Mode 2
.....................23
5. DIAGRAMS
5-1.
Block Diagram (1)
.....................25
Block Diagram (2)
.....................29
5-2.
Circuit Board Location
.....................32
5-3.
Schematic Diagrams and
Printed Wiring Boards
.....................32
*
S1 Board
.....................33
*
F Board
.....................34
*
K Board
.....................36
*
H Board
.....................37
*
A Board
.....................41
*
VM Board
.....................46
*
C Board
.....................50
5-4.
Semiconductors
.....................51
5-5.
IC Blocks
.....................53
6. EXPLODED VIEWS
6-1.
Chassis
.....................54
6-2.
Picture Tube
.....................56
7. ELECTRICAL PARTS LIST
.....................57