MODEL
COMMANDER DEST. CHASSIS NO.
KV-T25MF1K RM-883
India
SCC-K67H-A
SERVICE MANUAL
MODEL
COMMANDER DEST. CHASSIS NO.
TRINITRON ® COLOR TV
BG-1S (D) CHASSIS
2
KV-T25MF1K
RM-883
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, I, D/K, M
Color system
PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58
Channel coverage
B/G
VHF: E2 to E12/UHF: E21 to E69/CATV: S01 to S03, S1 to S41
I
UHF: B21 to B68/CATV: S01 to S03, S1 to S41
D/K
VHF: C1 to C12, R1 to R12/UHF: C13 to C57, R21 to R60/
CATV: S01 to S03, S1 to S41, Z1 to Z39
M
VHF: A2 to A13/UHF: A14 to A79/
CATV: A-8 to A-2, A to W+ 4, W+ 6 to W+ 84
Audio output (speaker)
5W + 5W
Inputs
Antenna: 75 ohms
VIDEO IN jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500 mVrms, high impedance
Outputs
Headphone jack: minijack
MONITOR OUT jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500 mVrms
Picture tube
25 in.
Tube size (cm)
64
Measured diagonally
Screen size (cm)
60
Measured diagonally
Dimensions (w/h/d, mm) 613
× 542 × 472
Mass (kg)
32
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.
Design and specifications are subject to change without notice.
3
KV-T25MF1K
RM-883
TABLE OF CONTENTS
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
2-5.
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 Adjustments .....
16
4. SELF DIAGNOSIS FUNCTION .............................
17
5. CIRCUIT ADJUSTMENTS
5-1.
Adjustments 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 Diagrams ....................................................
23
6-2.
Circuit Boards Location .......................................
26
6-3.
Schematic Diagrams and Printed Wiring Boards
(1)
Schematic Diagram of A Board ............................
31
(2)
Schematic Diagrams of A11, A12, C and
VM Boards ............................................................
35
6-4.
Semiconductors .....................................................
41
7. EXPLODED VIEW
7-1.
Chassis ..................................................................
43
8. ELECTRICAL PARTS LIST ....................................
45
Section
Title
Page
Section
Title
Page
4
KV
-T25MF1K
RM-883
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts from the
Operating Instructions Manual. The page numbers of the Operating
Instruction Manual remain as in this manual.
2
3
B/G
I
D/K
M
TV SYSTEM
AUTO PROGR
TV SYSTEM
AUTO PROGR
5
KV
-T25MF1K
RM-883
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