KV-21V4A - Sony TV Service Manual (repair manual)

kv-21v4a service manual
Model
KV-21V4A
Pages
65
Size
1.46 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-21v4a.pdf
Date

Read Sony KV-21V4A Service Manual online

VHS Mechanical Adjustments IV
Part No.
9-973-623-01
MODEL
COMMANDER DEST. CHASSIS NO.
KV-21V4A
RM-C801
Italian
SCC-J09F-A
TRINITRON
®
 COLOUR VIDEO TV
SERVICE MANUAL
TE-1
   CHASSIS
MODEL
COMMANDER DEST. CHASSIS NO.
M I C R O F I L M
*Please file according to model size. ........
Note :
1. Refer to the Service Manual of VHS MECHANICAL ADJUSTMENTS
IV for MECHANICAL ADJUSTMENTS.
KV-21V4E
RM-C801
Spanish
SCC-J12D-A
KV-21V4U
RM-C802
UK
SCC-J14D-A
21
KV-21V4B
RM-C803
French
SCC-J10D-A
KV-21V4D
RM-C801
AEP
SCC-J11D-A
– 2 –
SPECIFICATIONS
ITEM MODEL
Television System
Channel Coverage
Color System
E2 to E12
E21 to E69
KV-21V4A
B / G
A-H, S1 to S41
PAL
S01 to S05
E2 to E12
E21 to E69
KV-21V4B
B / G / L
A-H, S1 to S41
PAL / SECAM
S01 to S05
E2 to E12
E21 to E69
KV-21V4D
B / G
A-H, S1 to S41
PAL
S01 to S05
E2 to E12
E21 to E69
KV-21V4E
B / G
S01 to S41
PAL
S01 to S05
KV-21V4U
I
UHF: U21-U69
PAL
TV Section
Television system
See “Receivable channels”
Colour system
See “Receivable channels”
Channel coverage
See “Receivable channels”
Picture tube
Trinitron
Approx. 54.5cm
(21 inches)
(Approx. 51cm picture measured
diagonally)
Aerial in
75-ohm aerial socket for VHF/UHF
Video Section
Format
VHS standard
Video recording system
Rotary 2-head helical scanning system
Audio recording system
Monaural
Video signal
PAL / SECAM (B only)
Tape speed
PAL /  : 23.39mm / sec.
NTSC (playback only) :
33.35mm / sec.
Maximum recording time
240minutes with E-240
Inputs and Outputs
Inputs
LINE IN VIDEO : phono jack (1)
1Vp-p, 75 ohms, unbalanced,
sync negative
LINE IN AUDIO : phono jack (1)
Input level : 500 mVrms
(100% modulation)
EURO-AV : 21-pin
Outputs
EURO-AV : 21-pin
Headphones jack
Monaural minijack
General
Clock
Quartz locked
Power back up
Approx. 7 days
Power requirements
230 V AC, 50Hz, 220-240V, (21V4U)
Power consumption
81W, 112W (21V4U)
Operating temperature 5
°
C to 40
°
C (41
°
F to 104
°
F)
Storang temperature
-20
°
C to 60
°
C (-4
°
F to 140
°
F)
Dimensions
Approx. 540 
x
 518 
x
 470 mm (w / H / d)
(21 
3/8
 
x
 20 
1/2
 
x
 18 
5/8
 inches)
Mass
Approx. 25 kg (55 lb 2 oz)
Accessories supplied
Remote Commander (1)
R6 (size AA) batteries (2)
Designed and specifications are subject to change without notice.
Note
This appliance conforms with the EU Directive 89 / 336 / EEC
regarding interference suppression.
RECEIVABLE CHANNELS
– 3 –
3-4.
Focus ..................................................... 29
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments ................................. 30
5. DIAGRAMS
5-1.
Block Diagram .......................................... 33
5-2.
Circuit Boards Location ............................... 37
5-3.
Printed Wiring Boards and Schematic Diagrams .. 37
• A Board ................................................ 41
• YC Board .............................................. 45
• C, F2, H3, H4 Boards ................................ 52
5. EXPLODED VIEWS
5-1.
Picture Tube ............................................. 92
5-2.
Chassis ................................................... 93
6. ELECTRICAL PARTS LIST
............................ 98
VIDEO SECTION
1. GENERAL
..................................................... 60
2. CIRCUIT ADJUSTMENTS
.............................. 61
3. INTERFACE, IC PIN FUNCTION
DESCRIPTION
............................................... 65
4. DIAGRAMS
................................................... 70
5. EXPLODED VIEWS
....................................... 94
6. ELECTRICAL PARTS LIST
............................ 109
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
TV SECTION
1. GENERAL
Step 1-Preparation ...............................................
4
Step 2-Connecting the Aerial ..................................
4
Step 3-Tuning in to TV Stations ..............................
5
Step 4-Setting up Video Plus+ ................................
8
Step 5-Setting the Clock .......................................
9
Watching the TV ................................................ 10
Viewing Teletext ................................................ 12
Playing a Tape ................................................... 13
Recording TV Programmes .................................... 14
Recording TV Programmes Using the Timer ............... 15
Recording TV Programmes Using Video Plus+ ............ 18
Switching off Automatically-Sleep Timer .................. 19
Switching on at Your Desired Time-On Timer ............. 19
Enhancing Video Picture Quality ............................. 20
Connecting Optional Equipment .............................. 21
Index to Parts and Controls .................................... 22
2. DISASSEMBLY
2-1.
Rear Cover Removal ................................... 23
2-2.
Chassis Assy Removal ................................. 23
2-3.
A Board Removal ...................................... 23
2-4.
Service Position ......................................... 23
2-5.
Picture Tube Removal ................................. 24
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing .......................................... 26
3-2.
Convergence ............................................ 27
3-3.
Screen (G2), Drive, White Balance, Sub Color
and Sub Brightness ..................................... 29
(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 À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÈS PAR UNE TRAME ET PAR UNE
MARQUE 
 SUR LES SCHÉMAS DE PRINCIPE, LES VUES
EXPLOSÉES ET LES LISTES DE PIECES SONT D'UNE IMPORTANCE
CRITIQUE POUR LA SÉCURITÉ DU FONCTIONNEMENT. NE LES
REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE
NUMÉRO DE PIÉCE EST INDIQUÉ DANS LE PRÉSENT MANUEL OU
DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY. LES RÉGLAGES
DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA
SÉCURITÉ DU FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS DE CHAQUE
REMPLACEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN
MAUVAIS FONCTIONNEMENT EST SUSPECTÉ.
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-solderd
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly tran-
sistors, that were installed during a previous repair. Point them
out to the customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious
signs of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
SAFETY CHECK-OUT
Page of 65
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Here you can read online and download Sony KV-21V4A Service Manual in PDF. KV-21V4A service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KV-21V4A TV. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.