KV-XJ29N90 - Sony TV Service Manual (repair manual)

MODEL

COMMANDER DEST. CHASSIS NO.

MODEL

COMMANDER   DEST.

CHASSIS NO.

KV-XJ29N90

RM-915      Taiwan

SCC-U54H-A

TV

1

2

3

4

6

7

8

9

0

5

®

– 2 –

! ON

110V AC, 60 Hz

Power consumption (W) Indicated on the rear of the TV

M

NTSC3.58, PAL*, PAL 60*, SECAM*, NTSC 4.43*

*AV IN only

MTS

VHF  : 2 to 13
UHF  : 14 to 69
CATV: 1 to 125

8

75-ohm external terminal

5W + 5W

Input: 3* Output :1

Phono jacks;

*Two input lines available

1 Vp-p, 75 ohms

Input: 3* Output :1

Phono jacks;

*Two input lines available

500 m Vrms

Input: 1

Phono jacks;

 (DVD) IN

Y : 1 Vp-p, 75 ohms,
sync negative
C

B

 : 0.7 Vp-p, 75 ohms

C

R

 : 0.7 Vp-p, 75 ohms

Audio : 500 mVrms

i

Output: 1

Stereo minijack

29 in.

724mm

Measured diagonally

679mm

Measured diagonally

794 x 573 x 517

49

Design and specifications are subject to change without notice.

– 3 –

SELF DIAGNOSTIC FUNCTION .............................. 4

1. GENERAL ................................................................. 7

2-1. Rear Cover Removal ............................................... 19
2-2. Speaker Removal .................................................... 19
2-3. Chassis Assy Removal ............................................ 19
2-4. Service Position ...................................................... 19
2-5. Replacement of Parts .............................................. 19

2-5-1. Replacement of Multi Button ...................... 19
2-5-2. Replacement of Light Guide ........................ 19

2-6. J4 Board and Terminal Bracket Removal ............... 20
2-7. D3 Board Removal .................................................. 20
2-8. H5 Board Removal .................................................. 20
2-9. A and B9 Boards Removal ..................................... 20
2-10. Picture Tube Removal ............................................. 21

3-1. Beam Landing ......................................................... 22
3-2. Convergence ............................................................ 23
3-3. Focus Adjustment .................................................... 25
3-4. G2 (Screen) and White Balance Adjustments ........ 25

4-1. Adjustment With Commander ................................ 26
4-2. Adjustment Method ................................................ 26
4-3. Picture Quality Adjustments ................................... 31
4-4. Deflection Adjustment ............................................ 31
4-5. H-Trapezoid Adjustment ......................................... 31
4-6. A Board Adjustment After IC003 (Memory)

Replacement ............................................................ 31

4-7. Picture Distortion Adjustment ................................ 32

5-1. Block Diagram ........................................................ 33
5-2. Circuit Boards Location .......................................... 35
5-3. Schematic Diagrams ............................................... 36

(1) B9 Board Schematic Diagrams ......................... 37
(2) A Board Schematic Diagram ............................ 39
(3) C6 Board Schematic Diagram .......................... 43
(4) H5 Board Schematic Diagram .......................... 45
(5) VM1 Board Schematic Diagram ....................... 47
(6) D3 Board Schematic Diagram .......................... 48
(7) J4 Board Schematic Diagram ........................... 49

5-4. Voltage Measurements ............................................ 50
5-5. Waveforms .............................................................. 53
5-6. Printed Wiring Boards and Parts Location ............. 54
5-7. Semiconductors ....................................................... 59

6-1. Speaker Bracket ...................................................... 61
6-2. Chassis ..................................................................... 62
6-3.  Picture Tube ........................................................... 63

7. ELECTRICAL PARTS LIST .................................... 64

– 4 –

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.

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”.

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.

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.

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 F7601

(B9)

• H.OUT Q511 is shorted.

(A board)

• IC1800 is shorted.

(C6 board)

• -13V is not supplied.

(A board)

• IC 503 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.
• Video 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