KV-XF25M50 (serv.man4) - Sony TV Service Manual (repair manual)

kv-xf25m50 (serv.man4) service manual
Model
KV-XF25M50 (serv.man4)
Pages
62
Size
2.25 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xf25m50-sm4.pdf
Date

Read Sony KV-XF25M50 (serv.man4) Service Manual online

MODEL
COMMANDER DEST. CHASSIS NO.
KV-XF25M50
RM-954
indonesia SCC-U20L-A
MODEL
COMMANDER DEST. CHASSIS NO.
CHASSIS
TRINITRON 
®
 
COLOR TV
SERVICE MANUAL
BG-3S
Self Diagnosis
Supported model
– 2 –
KV-XF25M50
RM-954
SPECIFICATIONS
Note
Power requirements
110-240V 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
˘
 (Antenna)
75-ohm external terminal
Audio output
6W + 6W
Number of terminal
(Video)
Input: 3
Output: 1
Phono jacks; 1 V
P-P
, 75 ohms
(Audio)
Input: 3
Output: 1
Phono jacks; 500 mVrms
(S Video)
Input: 2
Y : 1 Vp-p, 75 ohms,
unbalanced, sync
negative
C : 0.286 Vp-p, 75 ohms
2
 (Headphone)
Output: 1
Minijack
Picture tube
25 inch
Tube size (cm)
64
Measured diagonally
Screen size (cm)
60
Measured diagonally
Dimension (w/h/d, mm)
722 
×
 515 
×
 512
Mass (kg)
38
Design and specifications are subject to change without notice.
SAFETY-RELA TED COMPONENT 
WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK 
!
 ON
THE SCHEMA TIC DIA GRAMS,  EXPLODED  VIEWS AND IN 
THE
PAR TS LIST ARE CRITICAL 
TO SAFE OPERA TION.  REPLA CE
THESE COMPONENTS 
WITH SONY P AR TS  WHOSE P AR T
NUMBERS APPEAR AS SHO
WN IN  THIS MANU AL OR IN
SUPPLEMENTS PUBLISHED BY SONY
.
CAUTION
SHOR T CIRCUIT  THE ANODE OF 
THE PICTURE  TUBE AND
THE ANODE CAP 
TO THE MET AL CHASSIS,  CR T SHIELD , OR
CARBON P AINTED ON  THE CR T, AFTER REMO VING  THE
ANODE.
– 3 –
KV-XF25M50
RM-954
TABLE OF CONTENTS
Section
Title
Page
SELF DIAGNOSIS FUNCTION
................................
4
1. GENERAL
........................................................................
8
2. DISASSEMBLY
2-1.
Rear Cover Removal ................................................ 25
2-2.
Chassis Assy Removal ............................................. 25
2-3.
F Bracket Removal .................................................. 25
2-4.
Service Position ....................................................... 25
2-5.
Replacement of Parts ............................................... 26
2-5-1.
Replacement of Control Button .......................
26
2-5-2.
Replacement of Light Guide ............................
26
2-6.
Terminal Bracket Removal ...................................... 26
2-7.
H3 Board Removal .................................................. 26
2-8.
A and B3 Boards Removal ...................................... 27
2-9.
Picture Tube Removal .............................................. 27
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing .......................................................... 29
3-2.
Convergence ............................................................. 30
3-3.
Focus Adjustment .................................................... 32
3-4.
G2 (Screen) and White Balance Adjustments ......... 33
4. CIRCUIT ADJUSTMENT
4-1.
Adjustments with Commander ................................ 34
4-2.
Adjustment Method ................................................. 35
4-3.
Picture Quality Adjustments .................................... 40
4-4.
A Board Adjustment After IC003 (Memory)
Replacement ............................................................. 40
4-5.
Picture Distortion Adjustment ................................. 41
Section
Title
Page
5. DIAGRAMS
5-1.
Block Diagram ......................................................... 43
5-2.
Frame Schematic Diagram ...................................... 46
5-3
Circuit Boards Location .......................................... 49
5-4.
Schematic Diagrams and Printed Wiring Boards ... 50
(1)
Schematic Diagram of A (1/2) Board ...................... 53
(2)
Schematic Diagrams of A (2/2) and F Boards ........ 57
(3)
Schematic Diagram of B2 and VM1 Boards ........... 61
(4)
Schematic Diagrams of B3 Board ........................... 64
(5)
Schematic Diagram of C and H3 Boards ................ 73
5-5.
Semiconductors ........................................................ 76
6. EXPLODED VIEWS
6-1.
Speaker Bracket ....................................................... 79
6-2.
Chassis ..................................................................... 80
6-3.
Picture Tube ............................................................. 81
7. ELECTRICAL PARTS LIST
....................................... 82
– 4 –
KV-XF25M50
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.
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)
• IC701 is shorted. (C board)
• -13V is not supplied. (A
board)
• IC 503 faulty (A board)
• G2 is improperly adjusted.
(Note 2)
• CRT problem.
• Video OUT IC701 is faulty.
(C board)
• IC301 is faulty. (A board)
• No connection A board to C
board.
• Discharge CRT (C Board)
• Static discharge
• External noise
Page of 62

Download Sony KV-XF25M50 (serv.man4) Service Manual (Repair Manual)

Here you can read online and download Sony KV-XF25M50 (serv.man4) Service Manual in PDF. KV-XF25M50 (serv.man4) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KV-XF25M50 (serv.man4) TV. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.