Sony KV-AR25M31 Service Manual ▷ View online
MODEL
COMMANDER DEST. CHASSIS NO.
CHASSIS
TRINITRON
®
COLOR TV
SERVICE MANUAL
BG3R
MODEL
COMMANDER DEST.
CHASSIS NO.
KV-AR25M31
RM-995 OCEANIA
SCC-U44G-A
KV-AR25M68
RM-993 THAILAND
SCC-U49R-A
KV-AR25M90
RM-995 HONG KONG SCC-U50G-A
RM-995
RM-993
– 2 –
KV-AR25M68/AR25M31/AR25M90
RM-993
RM-995
Power requirements
220-240 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, NTSC3.58, NTSC4.43
Stereo/Bilingual system
NICAM Stereo / Bilingual B/G, I; A2 Stereo / Bilingual B/G
Teletext language
English, Arabic, French
KV-AR25M31
Channel coverage
B/G
VHF: E2 to E12
UHF: E21 to E69
CATV: S01 to S03, S1 to S41
UHF: E21 to E69
CATV: S01 to S03, S1 to S41
VHF: 0 to 12, 5A, 19A
UHF: 28 to 69
CATV: S01 to S03, S1 to S41
UHF: 28 to 69
CATV: S01 to S03, S1 to S41
AUSTRALIA only
VHF: 1 to 11
UHF: 21 to 69
CATV: S01 to S03, S1 to S41
UHF: 21 to 69
CATV: S01 to S03, S1 to S41
NEW ZEALAND only
I
UHF: B21 to B68
CATV: S01 to S03, S1 to S41
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
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
UHF: A14 to A79
CATV: A-8 to A-2, A to W+4, W+6 to W+84
(Antenna)
75-ohm external terminal
Audio output (Speaker)
8W + 8W
Number of terminal
DVideo
Input: 4*
Output: 1
Phone jacks; 1 Vp-p, 75 ohms
* Three input lines available
≥ Audio
Input: 4*
Output: 1
Phone jacks; 500 mVrms
* Three input lines available
(S Video)
Input : 2
Y: 1 Vp-p, 75 ohms,
unbalanced, sync negative
C: 0.286 Vp-p, 75 ohms
(Component
Input : 1
Phono jacks:
Video)
Y: 1 Vp-p, 75 ohms,
sync negative
C
sync negative
C
B
: 0.7 Vp-p, 75 ohms
C
R
: 0.7 Vp-p, 75 ohms
Audio: 500mVrms
2 (Headphone)
Output: 1
Stereo minijack
Picture tube
25 in.
Tube size (cm)
64
Measured diagonally
Screen size (cm)
60
Measured diagonally
Dimension (w/h/d,mm)
650
× 517 × 496
Mass (kg)
39
SPECIFICATIONS
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.
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.
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.
THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
Note
Design and specifications are subject to change without notice.
– 3 –
KV-AR25M68/AR25M31/AR25M90
RM-993
RM-995
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION ....................................... 4
1. DISASSEMBLY
1-1.
Rear Cover Removal ................................................... 7
1-2.
Speaker Block Assy Removal ..................................... 7
1-3.
Chassis Assy Removal (KV-AR25M68) .................... 7
1-4.
Chassis Assy Removal (KV-AR25M31/AR25M90) ... 7
1-5.
Service Position .......................................................... 7
1-6.
F Board Removal (KV-AR25M68) ............................ 7
1-7.
F Board Removal (KV-AR25M31/AR25M90) ........... 8
1-8.
Terminal Bracket and J Board Removal
(KV-AR25M68) .......................................................... 8
(KV-AR25M68) .......................................................... 8
1-9.
Terminal Bracket and J Board Removal
(KV-AR25M31/AR25M90) ......................................... 8
(KV-AR25M31/AR25M90) ......................................... 8
1-10. V1 and B1 Boards Removal ....................................... 8
1-11. P5 Board Removal ...................................................... 8
1-12. H1 and H2 Boards Removal ....................................... 8
1-13. A and B10 Boards Removal (KV-AR25M68) ........... 9
1-14. A and B8 Boards Removal
1-11. P5 Board Removal ...................................................... 8
1-12. H1 and H2 Boards Removal ....................................... 8
1-13. A and B10 Boards Removal (KV-AR25M68) ........... 9
1-14. A and B8 Boards Removal
(KV-AR25M31/AR25M90) ....................................... 9
1-15. Picture Tube Removal ................................................. 9
2. ADVANCE OPERATION
2-1.
"RESET" Function .................................................... 11
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing ........................................................... 12
3-2.
Convergence .............................................................. 13
3-3.
Focus Adjustment ..................................................... 15
3-4.
G2 (SCREEN) and White Balance Adjustment ....... 16
4. CIRCUIT ADJUSTMENTS
4-1.
Adjustment With Commander .................................. 17
4-2.
Adjustment Method .................................................. 17
4-3.
Adjustment for Non Digital Texture Enhancer (DTE)
Model ........................................................................ 30
Model ........................................................................ 30
4-4.
Adjustment for Digital Texture Enhancer (DTE)
Model ........................................................................ 30
Model ........................................................................ 30
4-5.
Display Position Adjustment .................................... 31
4-6.
Deflection Adjustment .............................................. 31
4-7.
H-Trapezoid Adjustment .......................................... 32
4-8.
A Board Adjustment After IC003 (MEMORY)
Replacement .............................................................. 32
Replacement .............................................................. 32
4-9.
Picture Distortion Adjustment .................................. 33
Section
Title
Page
Section
Title
Page
5. DIAGRAMS
5-1.
Block Diagram .......................................................... 34
5-2.
Circuit Board Location ............................................. 38
5-3.
Schematic Diagram ................................................... 39
(1) A Board Schematic Diagram .............................. 40
(2) B10 Board Schematic Diagram .......................... 44
(3) V1 Board Schematic Diagram ............................ 46
(4) C6 Board Schematic Diagram ............................ 48
(5) H1 Board Schematic Diagram ............................ 50
(6) B8 Board Schematic Diagram ............................ 52
(7) P5 Board Schematic Diagram ............................. 54
(8) B1 Board Schematic Diagram ............................ 62
(9) H2 Board Schematic Diagram ............................ 63
(10) J and F Boards Schematic Diagrams ................ 64
(11) VM1 Board Schematic Diagram ...................... 65
(1) A Board Schematic Diagram .............................. 40
(2) B10 Board Schematic Diagram .......................... 44
(3) V1 Board Schematic Diagram ............................ 46
(4) C6 Board Schematic Diagram ............................ 48
(5) H1 Board Schematic Diagram ............................ 50
(6) B8 Board Schematic Diagram ............................ 52
(7) P5 Board Schematic Diagram ............................. 54
(8) B1 Board Schematic Diagram ............................ 62
(9) H2 Board Schematic Diagram ............................ 63
(10) J and F Boards Schematic Diagrams ................ 64
(11) VM1 Board Schematic Diagram ...................... 65
5-4.
Voltage List and Waveforms ..................................... 68
5-5.
Printed Wiring Boards and Parts Location ............... 77
5-6.
Semiconductors ......................................................... 90
6. EXPLODED VIEWS
6-1.
Speaker Block ........................................................... 92
6-2.
Chassis ...................................................................... 93
6-3.
Picture Tube .............................................................. 94
7. ELECTRICAL PARTS LIST ......................................... 95
OPERATING INSTRUCTIONS
– 4 –
KV-AR25M68/AR25M31/AR25M90
RM-993
RM-995
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically
begin to flash.
The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER
lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot
be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past
problems and how often these problems occur.
begin to flash.
The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER
lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot
be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past
problems and how often these problems occur.
1.
DIAGNOSTIC TEST INDICATORS
When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the lamp will identify the first of the problem areas.
problem. If there is more than one error, the lamp will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.
Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.
The symptom that is diagnosed first by the microcontroller is displayed on the screen.
Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.
* R(Q703), G(Q702) or B(Q701) out is faulty (C6 board).
SELF DIAGNOSTIC FUNCTION
Diagnostic
Item
Description
• Power does not
turn on
• +B overcurrent
(OCP) or
overvoltage
(OVP)
overvoltage
(OVP)
• Vertical deflection
stopped
• Horizontal
deflection
overdrive
overdrive
• White balance
failure (no
PICTURE)
PICTURE)
• Micro reset
Detected
Symptoms
• Power does not come on.
• No power is supplied to the
• No power is supplied to the
TV.
• AC power supply is faulty.
• Power does not come on.
• Load on power line is
• Load on power line is
shorted.
• Has entered standby state
after horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted or
power supply is stopped.
• No raster is generated.
• CRT cathode current
• CRT cathode current
detection reference pulse
output is small.
output is small.
• Power is shut down shortly,
after this return back to
normal.
normal.
• Detect Micro latch up.
No. of times
STANDBY/TIMER
lamp flashes
Does not light
2 times
5 times
—
Self-diagnostic
display/Diagnostic
result
—
002:000 or
002:001~255
003:001~255
004:001~255
003:001~255
004:001~255
at the same time
005:000 or
005:001~225
101:00 or
101:001~225
Probable
Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out F4601
(F)
• H.OUT Q511 is shorted.
(A board)
• Q701, Q702, Q703 is
shorted (C6 board)
• -13V is not supplied.
(A board)
• IC 503 faulty (A board)
• G2 is improperly adjusted.
(Note 2)
• CRT problem.
• R(Q703), G(Q702) or
• R(Q703), G(Q702) or
B(Q701) out is faulty
(C6 board)
(C6 board)
• IC301 is faulty. (A board)
• No connection A board to
• No connection A board to
C6 board.
• Discharge CRT (C6 Board)
• Static discharge
• External noise
• Static discharge
• External noise