TRINITRON ® COLOR TV
MODEL
COMMANDER DEST. CHASSIS NO.
KV-T21PF1
RM-870
India
SCC-K67D-A
SERVICE MANUAL
MODEL
COMMANDER DEST. CHASSIS NO.
BG-1S (D) CHASSIS
2
KV-T21PF1
RM-870
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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
! ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
SPECIFICATIONS
Note
Power requirements
110-240 V AC, 50/60 Hz
Power consumption (W) Indicated on the rear of the TV
Television system
B/G
Color system
PAL, PAL 60, NTSC4.43, NTSC3.58 (AV IN)
Channel coverage
B/G
VHF: E2 to E12/UHF: E21 to E69/CATV: S01 to S03, S1 to S41
Audio output (speaker)
3W
+ 3W
Inputs
Antenna: 75 ohms
VIDEO IN jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500mVrms, high impedance
Outputs
Headphone jack: minijack
MONITOR OUT jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500 mVrms
Picture tube
21 in.
Tube size (cm)
54
Measured diagonally
Screen size (cm)
51
Measured diagonally
Dimensions (w/h/d, mm) 527
× 464 × 471
Mass (kg)
22
Design and specifications are subject to change without notice.
3
KV-T21PF1
RM-870
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
5. CIRCUIT ADJUSTMENTS
5-1.
Adjustment With Commander ................................. 18
5-2.
Adjustment Method ................................................. 19
5-3.
A Board, Adjustment After IC003
(MEMORY) Replacement ....................................... 22
5-4.
Picture Distortion Adjustment ................................. 22
6. DIAGRAMS
6-1.
Block Diagram ......................................................... 23
6-2.
Circuit Boards Location .......................................... 25
6-3.
Schematic Diagrams and Printed Wiring Boards ... 25
(1)
Schematic Diagram of A Board ............................... 29
(2)
Schematic Diagrams of A11, A12 and C Boards .... 33
6-4.
Semiconductors ........................................................ 37
7. EXPLODED VIEW ........................................................ 39
8. ELECTRICAL PARTS LIST ...................................... 41
1. GENERAL ........................................................................ 4
2. DISASSEMBLY
2-1.
Rear Cover Removal ............................................... 10
2-2.
A Board Removal .................................................... 10
2-3.
Service Position ....................................................... 10
2-4.
Replacement of parts ............................................... 11
2-4-1. Replacement of Multi Button ............................... 11
2-4-2. Replacement of Light Guide and Power Button .. 11
2-5.
Demagnetization Coil Removal .............................. 11
2-6.
Picture Tube Removal ............................................. 12
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing .......................................................... 13
3-2.
Convergence ............................................................ 14
3-3.
Focus Adjustment .................................................... 16
3-4.
G2 (Screen) and White Balance Adjustment .......... 16
4. SELF DIAGNOSIS FUNCTION ......................... 17
4
KV
-T21PF1
RM-870
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts from the
Operating Instr uctions Manual. The page numbers of the Operating
Instruction Manual remain as in the manual.
2
3
B/G
I
D/K
M
TV SYSTEM
AUTO PROGR
TV SYSTEM
AUTO PROGR
Note) TV SYSTEM is not used for this model.
5
KV
-T21PF1
RM-870
Getting Started
4
Connections
Connecting a VHF antenna or a combination VHF/UHF antenna
-- 75-ohm coaxial cable (round)
Attach an optional IEC antenna connector to the 75-ohm coaxial cable.
Plug the connector into the
(antenna) socket at the rear of the TV.
Getting Started
On a wall
or
Rear of TV
Rear of TV
Getting Started
5
Connecting audio/video equipment using MONITOR OUT jacks
When using the video input jacks
Do not connect video equipment to the video input jacks at the front and the rear of your TV simultaneously; otherwise the picture will
not be displayed properly on the screen.
to antenna
output
or
MONITOR OUT
Rear of TV
When recording through the MONITOR OUT jacks
If you change the channel or video input while recording with a VCR, the channel or video input you are recording also will be changed.
to antenna socket
Audio system
Connecting optional equipment
You can connect optional audio/video equipment to your TV such as a VCR, multi disc player, camcorder, video
game or stereo system.
Connecting video equipment using video input jacks
VIDEO IN
Rear of TV
Front of TV
VIDEO
L (MONO)
VIDEO INPUT
AUDIO
R
VIDEO
IN
MONITOR
OUT
VIDEO
L (MONO)
AUDIO
R
to video
and audio
outputs
: Signal flow
: Signal flow
to video and
audio outputs
Camcorder
to antenna
output
VCR
to antenna socket
VIDEO
IN
MONITOR
OUT
VIDEO
L (MONO)
AUDIO
R
: Signal flow
to video
and audio
inputs
VCR