KV-21FX250 - Sony TV Service Manual (repair manual)

Model: KV-21FX250
Pages: 55
Size: 7.02 MB
Type: PDF
Document: Service Manual
Brand: Sony
Device: TV
File: kv-21fx250.pdf
Date: 2018-11-20

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TRINITRON
®
 COLOR TELEVISION
 SERVICE MANUAL 
BX-1S
 
CHASSIS
 

MODEL NAME 

REMOTE COMMANDER 
DESTINATION  
CHASSIS NO.
9-883-750-01
KV-21FX250
 
RM-YA005 LATIN 
AMERICA 
SCC-V66Q-A
KV-21FX250A
 
RM-YA005 ARGENTINA 
SCC-V86A-A
KV-21FX250C
 
RM-YA005 CHILE 
SCC-V66R-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE:  5/2007
            
REVISION 
DATE 
  SUBJECT     
5/2007 
 
 
 
No revisions or updates are applicable at this time.

TRINITRON
®
 COLOR TELEVISION
 SERVICE MANUAL 
BX-1S
 
CHASSIS
 

MODEL NAME 

REMOTE COMMANDER 
DESTINATION  
CHASSIS NO.
9-883-750-01
KV-21FX250
 
RM-YA005 LATIN 
AMERICA 
SCC-V66Q-A
KV-21FX250A
 
RM-YA005 ARGENTINA 
SCC-V86A-A
KV-21FX250C
 
RM-YA005 CHILE 
SCC-V66R-A
Self Diagnosis
Supported model
 KV-21FX250 
RM-YA005

KV-21FX250/21FX250A/21FX250C
KV-21FX250/21FX250A/21FX250C 
3
TABLE OF CONTENTS
SECTION TITLE   
 
 
 
 
PAGE
Speciﬁ cations ....................................................................................................................................................................................................... 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. Conﬁ rming Service Adjustment Changes ................................................................................................................................................... 18
3-4. White Balance Adjustments ........................................................................................................................................................................ 18
3-5. Picture Quality Adjustments ....................................................................................................................................................................... 18
3-6. Service Data ............................................................................................................................................................................................... 20
SECTION 4:  DIAGRAMS ................................................................................................................................................................................................. 29
4-1. Circuit Boards Location .............................................................................................................................................................................. 29
4-2.  Printed Wiring Board and Schematic Diagram Information ........................................................................................................................ 29
4-3. Block Diagram ............................................................................................................................................................................................ 30
Signal Flow Block Diagram ........................................................................................................................................................................ 30
4-4.  Schematics and Supporting Information .................................................................................................................................................... 31
A Board Schematic Diagram (1 of 6) ......................................................................................................................................................... 31
A Board Schematic Diagram (2 of 6) ......................................................................................................................................................... 32
A Board Schematic Diagram (3 of 6) ......................................................................................................................................................... 33
A Board Schematic Diagram (4 of 6) ......................................................................................................................................................... 34
A Board Schematic Diagram (5 of 6) ......................................................................................................................................................... 35
A Board Schematic Diagram (6 of 6) ......................................................................................................................................................... 36
CV Board Schematic Diagram ................................................................................................................................................................... 38
H1 Board Schematic Diagram ................................................................................................................................................................... 40
4-5. Semiconductors .......................................................................................................................................................................................... 41
SECTION 5:  EXPLODED VIEWS .................................................................................................................................................................................... 42
5-1.  Chassis, Picture Tube and Speakers ......................................................................................................................................................... 42
SECTION 6:  ELECTRICAL PARTS LIST ........................................................................................................................................................................ 43

KV-21FX250/21FX250A/21FX250C
KV-21FX250/21FX250A/21FX250C 
4
SPECIFICATIONS
Television system
NTSC (KV-21FX250/21FX250C ONLY)
NTSC, PAL-M/PAL-N (KV-21FX250A ONLY)
Channel coverage
VHF: 2-13/UHF: 14-69/CATV: 1-125
Picture tube
FD Trinitron
®
 tube
Visible screen size
508.5 mm (20-inch) picture measured diagonally
 
Actual screen size
545 mm (21-inch) measured diagonally
Supplied Accessories
Remote Commander RM-YA005
Two Size AA (R6) Batteries
1)  1 Vp-p 75 ohms unbalanced, sync negative
2) 500 
mVrms (100% modulation), Impedance: 47 kilohms
3)  This speciﬁ cation is the maximum wattage.
Design and speciﬁ cations are subject to change without notice.
Trademarks and Copyrights
Sony, FD Trinitron, WEGA
®
, Steady Sound and Intelligent Picture 
are registered trademarks of Sony Corporation.
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. 
KV-21FX250
KV-21FX250A                    
KV-21FX250C
Power Requirements
Number of Inputs/Outputs
Video
1)
4
4
Audio
2)
5
5
S Video
1
1
Speaker Output (W)
10W x 2
10W x 2
Power Consumption (W)
In Use (Max)
108W
108W
In Standby (Max)
3)
<1W
<1W
Dimensions (W x H x D)
mm
646 x 485 x 484 mm
646 x 485 x 484 mm
in
25
 3/8
 x 19
1/8
 x 19 
1/16
 in
25
3/8
 x 19
1/8
 x 19 
1/16
 in
Mass
kg
26 kg
26 kg
lbs
57.5 lbs
57.5 lbs
120V AC, 60Hz
220V AC, 50/60Hz

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Download Sony KV-21FX250 Service Manual (Repair Manual)

Here you can read online and download Sony KV-21FX250 Service Manual in PDF. KV-21FX250 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KV-21FX250 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.

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