KV-21FA240 — Sony TV Service Manual (repair manual)

Model
KV-21FA240
Pages
60
Size
8.6 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-21fa240.pdf
Date

View Sony KV-21FA240 Service Manual online

TRINITRON
®
 COLOR TELEVISION
 SERVICE MANUAL 
BX-1S
 
CHASSIS
 
MODEL NAME 
REMOTE COMMANDER 
DESTINATION  
CHASSIS NO.
9-883-704-01
KV-21FA240
 
RM-YA005 BRAZIL 
SCC-S80B-A
Self Diagnosis
Supported model
 KV-21FA240 
RM-YA005
KV-21FA240
KV-21FA240 
3
TABLE OF CONTENTS
SECTION TITLE   
PAGE
SECTION TITLE   
PAGE
Specifications ........................................................................... 4
Warnings and Cautions ............................................................ 5
Safety Check-Out ..................................................................... 6
Self-Diagnostic Function .......................................................... 7
SECTION 1:  DISASSEMBLY ................................................................. 9
1-1.  Rear Cover Removal ........................................................ 9
1-2.  Chassis Assembly Removal ............................................. 9
1-3.  Service Position .............................................................. 10
1-4.  Picture Tube Removal .....................................................11
 
Anode Cap Removal Procedure ......................................11
SECTION 2:  SET-UP ADJUSTMENTS ................................................ 12
2-1.  Beam Landing ................................................................ 12
2-2.  Convergence .................................................................. 13
2-3.  Focus .............................................................................. 14
2-4.  Screen (G2) .................................................................... 15
SECTION 3:  CIRCUIT ADJUSTMENTS .............................................. 16
3-1.  Remote Adjustment Buttons and Indicators ................... 16
3-2.  Accessing the Service Menu Mode ................................ 17
3-3.  Confirming Service Adjustment Changes ....................... 18
3-4.  White Balance Adjustments ............................................ 18
3-5.  Picture Quality Adjustments ........................................... 18
PAL 50Hz Normal Mode ......................................................... 19
SECTION 4:  DIAGRAMS ..................................................................... 35
4-1.  Circuit Boards Location .................................................. 35
4-2.  Printed Wiring Board and 
 
Schematic Diagram Information ..................................... 35
4-3.  Block Diagrams and Schematics .................................... 36
Signal Flow Block Diagram ............................................ 36
4-4.  Schematics and Supporting Information ........................ 37
A Board Schematic Diagram (1 of 6) ............................. 37
A Board Schematic Diagram (2 of 6) ............................. 38
A Board Schematic Diagram (3 of 6) ............................. 39
A Board Schematic Diagram (4 of 6) ............................. 40
A Board Schematic Diagram (5 of 6) ............................. 41
A Board Schematic Diagram (6 of 6) ............................. 42
C Board Schematic Diagram ......................................... 44
J Board Schematic Diagram .......................................... 46
4-5.  Semiconductors .............................................................. 47
SECTION 5:  EXPLODED VIEWS ........................................................ 48
5-1.  Picture Tube ................................................................... 48
5-2.  Chassis ........................................................................... 49
SECTION 6:  ELECTRICAL PARTS LIST ............................................ 50
KV-21FA240
KV-21FA240 
4
SPECIFICATIONS
1)  1 Vp-p 75 ohms unbalanced, sync negative 
2)  Y: 1.0 Vp-p, 75 ohms, sync negative; PB: 0.7 Vp-p, 75 ohms; 
 
PR Vp-p, 75 ohms.
3) 500 
mVrms (100% modulation), Impedance: 47 kilohms
4)   This specifi cation is the maximum wattage.
Design and specifi cations are subject to change without notice.
Manufactured under license from Dolby 
Laboratories Licensing Corporation. Dolby 
and the double-D symbol are trademarks of 
Dolby Laboratories.
As an ENERGY STAR® Partner, Sony 
Corporation has determined that this 
product meets the ENERGY STAR® 
guidelines for energy efficiency. ENERGY 
STAR® is a U.S. registered mark. 
SRS and the ( )® symbol are trademarks of 
SRS Labs, Inc. 
Manufactured under license from BBE Sound, 
Inc. Licensed by BBE Sound, Inc. under USP 
4638258, 5510752 and 5736897. BBE and BBE 
symbol are registered trademarks of BBE 
Sound, Inc.
WEGA, FD Trinitron and Steady Sound are registered 
trademarks of Sony Corporation.
KV-21FA240
Power Requirements
110-220V, 50/60Hz
Number of Inputs/Outputs
Video 
1)
2
Y,P
B
, P
R
 2)
1
Audio
 3)
3
RF
 4)
1
Speaker Output (W)
4W x 2, 12W
Power Consumption (W)
In Use (Max)
115W
In Standby (Max)
 5) 
<1W
Dimensions (W x H x D)
25
1/2
x21x20
7/8
mm
647 x 533 x 530 mm
Mass
62 lbs. 61 oz.
kg
28.4 kg
Television system
PAL-M/PAL-N/NTSC
Channel coverage
VHF: 2-13/UHF: 14-69/CATV: 1-125
Antenna
75-ohm external antenna terminal for VHF/UHF
Picture tube
FD Trinitron
®
 tube
Visible screen size
20-inch picture measured diagonally 
Actual screen size
21-inch measured diagonally
Supplied Accessories
Remote Commander RM-YA005
Two Size AA (R6) Batteries
KV-21FA240
KV-21FA240 
5
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. 
Page of 60
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Here you can view online or download Sony KV-21FA240 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-21FA240 TV. Information contained in Sony KV-21FA240 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).