background image
MODEL
COMMANDER DEST. CHASSIS NO.
CHASSIS
TRINITRON ® COLOR TV
SERVICE MANUAL
BG-3R
MODEL
COMMANDER DEST.
CHASSIS NO.
KV-XA29M31 RM-954 OCE
SCC-U44A-A
KV-XA29M61 RM-954 Malaysia
SCC-U45A-A
KV-XA29M50 RM-954 Malaysia
SCC-U45B-A
KV-XA34M31 RM-954 OCE
SCC-U44B-A
1
4
7
-/--
2
5
8
0
3
6
9
FAVORITE
SOUND
MODE
PIC MODE
ENTER
MENU
A/B
SURROUND
KV-XA34M31
KV-XA29M31/XA29M50/XA29M61


background image
­ 2 ­
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
SPECIFICATIONS
Note
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, NTSC4.43, NTSC3.58
Except KV-XA29M50
Stereo/Bilingual system
NICAM Stereo / Bilingual B/G, I; A2 Stereo Bilingual (German) B/G
Except KV-XA29M50
Telerext Language
English, Arabic, French
Except KV-XA29M50
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
(Antenna)
75-ohm external terminal
Audio output (Speaker)
8W + 8W
10% distortion
Number of terminal
D (Video)
Input: 4*
Output: 1
Phono jacks; 1 VP-P, 75 ohms * Three input lines available
(Audio)
Input: 4*
Output: 1
Phono 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 Video) Input: 1
Phono jacks
Y : 1 Vp-p, 75 ohms,
sync negative
CB : 0.7 Vp-p, 75 ohms
CR : 0.7 Vp-p, 75 ohms
Audio : 500 mVrms
2
(Headphones)
Output: 1
minijack
Picture tube
29 inch
Except KV-XA34M61
34 inch
KV-XA34M61
Tube size (cm)
72
Measured diagonally
Except KV-XA34M61
86
Measured diagonally
KV-XA34M61
Screen size (cm)
68
Measured diagonally
Except KV-XA34M61
80
Measured diagonally
KV-XA34M61
Dimension (w/h/d, mm)
722 x 576 x 516
Except KV-XA34M61
895 x 674 x 590
KV-XA34M61
Mass (kg)
51
Except KV-XA34M61
78
KV-XA34M61
Design and specifications are subject to change without notice.
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.
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.


background image
­ 3 ­
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
TABLE OF CONTENTS
Section
Title
Page
SELF DIAGNOSIS FUNCTION ................................ 4
1. GENERAL ........................................................................ 7
2. DISASSEMBLY
2-1.
Rear Cover Removal ................................................ 25
2-2.
Speaker Removal ..................................................... 25
2-3.
Chassis Assy Removal ............................................. 25
2-4.
F Bracket Removal .................................................. 25
2-5.
Service Position ....................................................... 26
2-6.
Replacement of Parts ............................................... 26
2-6-1 Replacement of Light Guide ..............................................
26
2-6-2 Replacement of Power Button ...........................................
26
2-7.
HV Cap Block, PWB Holder and J Board Removal .. 26
2-8.
Terminal Bracket Removal ...................................... 26
2-9.
D2 and D3 Boards Removal ................................... 27
2-10. B1 and V1 Boards Removal .................................... 27
2-11. H Board Removal .................................................... 27
2-12. A and B Boards Removal ........................................ 27
2-13. Picture Tube Removal .............................................. 28
2-14. Removal of Anode Cap ............................................ 28
3. ADVANCE OPERATION
3-1.
"RESET" Function ................................................... 29
4. SET-UP ADJUSTMENTS
4-1.
Beam Landing .......................................................... 30
4-2.
Convergence Adjustment ......................................... 31
4-3.
Focus Adjustment .................................................... 33
4-4.
G2 (Screen) and White Balance Adjustments ......... 34
5. CIRCUIT ADJUSTMENTS
5-1.
Adjustments with Commander ................................ 35
5-2.
Adjustment Method ................................................. 37
5-3.
Picture Quality Adjustments .................................... 40
5-4.
Display position Adjustment ................................... 40
5-5.
Deflection Adjustment ............................................. 40
5-6.
H-Trapezoid Adjustment ......................................... 41
5-7.
A Board Adjustment After IC003
(memory) Replacement ........................................... 41
5-8.
Picture Distortion Adjustment ................................. 42
Section
Title
Page
6.
DIAGRAMS
6-1. Block Diagram .......................................................... 43
6-2. Circuit Board Location ............................................. 45
6-3. Schematic Diagrams ................................................. 47
(1) Schematic Diagrams of F, J and VM1 Boards ... 47
(2) Schematic Diagram of A Board .......................... 49
(3) Schematic Diagram of B Board .......................... 65
(4) Schematic Diagram of B1 and D3 Boards ........ 73
(5) Schematic Diagram of C6 and V1 Boards ......... 75
(6) Schematic Diagram of H Board ......................... 77
(7) Schematic Diagram of D2 Board ....................... 79
6-4.
A and B Boards Mark List ....................................... 81
6-5.
Voltage Measurements .............................................. 83
6-6.
Waveforms ................................................................ 95
6-7.
Printed Wiring Boards and Parts Location ............... 97
6-8.
Semiconductors ....................................................... 105
7.
EXPLODED VIEWS
7-1.
Picture Tube ............................................................ 108
7-2.
Chassis .................................................................... 109
8.
ELECTRICAL PARTS LIST .................................... 110


background image
­ 4 ­
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
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.
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.
Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a "0".
Diagnostic
Item
Description
· Power does not
turn on
· +B overcurrent
(OCP) or
overvoltage
(OVP)
· Vertical deflection
stopped
· Horizontal
deflection
overdrive
· White balance
failure (no
PICTURE)
· Micro reset
Detected
Symptoms
· Power does not come on.
· No power is supplied to the
TV.
· AC power supply is faulty.
· Power does not come on.
· 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
detection reference pulse
output is small.
· Power is shut down shortly,
after this return back to
normal.
· Detect Micro latch up.
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
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
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
B(Q701) out is faulty
(C6 board)
· IC301 is faulty. (A board)
· No connection A board to
C6 board.
· Discharge CRT (C6 Board)
· Static discharge
· External noise


background image
­ 5 ­
KV-XA29M31/XA29M50/
XA29M61/XA34M31
RM-954
2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT
3. STOPPING THE STANDBY/TIMER FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp
from flashing.
4. SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as "power sometimes shuts off" or "screen sometimes goes out" that cannot be confirmed, it
is possible to bring up past occurances of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[Screen display] / channel [5] / Sound volume [-] / Power ON
Note that this differs from entering the service mode (mode volume [+]).
Self-Diagnosis screen display
STANDBY/SLEEP lamp
Lamp ON 0.3 sec.
Lamp OFF 3 sec.
Lamp OFF 0.3 sec.
2 times
3 times
Diagnostic Item
Flash Count*
+B overcurrent/overvoltage
2 times
Vertical deflection stopped
White balance failure
5 times
* One flash count is not used for self-diagnostic.
002 : 000
003 : 000
004 : 000
005 : 001
Numeral "0" means that no fault has been detected.
Numeral "1" means a fault has been detected.
101 : 000
SELF DIAGNOSTIC