KV-SR25M53K — Sony TV Service Manual (repair manual)

Model
KV-SR25M53K
Pages
81
Size
7.79 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sr25m53k.pdf
Date

View Sony KV-SR25M53K Service Manual online

MODEL
COMMANDER DEST. CHASSIS NO.
CHASSIS
TRINITRON
®
 
COLOR TV
SERVICE MANUAL
BX1L
MODEL
COMMANDER   DEST.
CHASSIS NO.
KV-SR25M53K
RM-W109 Vietnam
SCC-V34A-A
RM-W109
– 2 –
KV-SR25M53K
RM-W109
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION .............................. 3
1. DISASSEMBLY
1-1. 3D Speaker Removal ................................................ 6
1-2. Rear Cover Removal ................................................. 6
1-3. Speaker Removal ...................................................... 6
1-4. Chassis Assy Removal .............................................. 6
1-5. Service Position ........................................................ 6
1-6. Terminal Bracket Removal ....................................... 6
1-7. J3 Board Removal ..................................................... 7
1-8. F Board Removal ...................................................... 7
1-9. K and BC Boards Removal ....................................... 7
1-10. H4 and H5 Boards Removal ..................................... 7
1-11. A and B Boards Removal ......................................... 7
1-12. Picture Tube Removal ............................................... 8
2. SET-UP ADJUSTMENTS
2-1. Beam Landing ........................................................... 9
2-2. Convergence ............................................................ 10
2-3. Focus Adjustment .................................................... 12
2-4. G2 (SCREEN) Adjustments ................................... 12
2-5. White Balance Adjustment ..................................... 12
2-6. Sub Bright Adjustment ........................................... 12
3. CIRCUIT ADJUSTMENTS
3-1. Adjustment With Commander ................................ 13
3-2. Adjustment Method ................................................ 14
3-3. Picture Quality Adjustment .................................... 32
3-4. Deflection Adjustment ............................................ 33
3-5. Picture Distortion Adjustment ................................ 34
Section
Title
Page
Section
Title
Page
4. DIAGRAMS
4-1. Block Diagram ........................................................ 36
4-2. Circuit Boards Location .......................................... 37
4-3. Schematic Diagram Information ............................ 37
4-3-1. A Board — Processor, Audio, Tuner, Jack
(Block 001) ................................................. 38
4-3-2. A Board — Power Supply, Deflection
(Block  002) ................................................ 40
4-3-3. A Board — Heat Sink (Block 003) ............ 42
4-3-4. B Board Schematic Diagram ..................... 43
4-3-5. BC Board Schematic Diagram ................... 45
4-3-6. C Board Schematic Diagram ..................... 47
4-3-7. H5 Board Schematic Diagram ................... 49
4-3-8. F Board Schematic Diagram ...................... 51
4-3-9. H4 Board Schematic Diagram ................... 52
4-3-10. J3 Board Schematic Diagram .................... 53
4-3-11. K Board Schematic Diagram ..................... 54
4-3-12. VM Board Schematic Diagram .................. 55
4-4. Voltage Measurement and Waveforms ................... 57
4-5. Printed Wiring Boards ............................................ 64
4-6. Semiconductors ....................................................... 71
5. EXPLODED VIEWS
5-1. Picture Tube and Speaker Bracket .......................... 73
5-2. 3D Speaker .............................................................. 73
5-3 Chassis ..................................................................... 75
6. ELECTRICAL PARTS LIST .................................... 76
OPERATING INSTRUCTIONS
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.
– 3 –
KV-SR25M53K
RM-W109
Diagnosis
Item
Description
• Power does not
turn on
• +B overcurrent
(OCP)*
• Vertical NG.
• IK (AKB)
• Supply Voltage
Protection
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.
• No power supply to CRT
ANODE.
• No RASTER is generated.
Note *: 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.
SELF DIAGNOSTIC FUNCTION
No. of times
STANDBY lamp
flashes
Does not light
2 times
4 times
5 times
8 times
Self-diagnostic
display/Diagnosis
result
2:0
2:1 ~ 255
4:0
4:1 ~ 255
5:0
5:1 ~ 255
8:0
8:1 ~ 255
Probable
Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out (F4601)
(F Board)
• H.OUT (Q511) is shorted.
(A board)
• IC751 is shorted.
(C/CV Board)
• +13V is not supplied.
(A Board)
• IC503 voltage list is faulty.
(A Board)
• Video OUT (IC751) is faulty.
(C Board)
• IC001 is faulty. (A Board)
• Screen (G2) is improperly
adjusted.
• IC604 faulty.
• IC607 faulty.
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.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 error occurs, the STANDBY/TIMER lamp will flash a 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”.
– 4 –
KV-SR25M53K
RM-W109
2. DISPLAY OF STANDBY (1) indicator FLASH
COUNT
3. STOPPING THE STANDBY indicator FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY 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 occurrence of failure on the screen for confirmation.
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[display] / channel [5] / volume [-] / Power 
 / TV 
˘
Note that this differs from entering the service mode (volume  [+]).
Self-Diagnostic screen display
Diagnostic Item
Flash Count*
+B overcurrent
2 times
Vertical NG.
4 times
IK (AKB)
5 times
Supply Voltage Protection
8 times
* One flash count is not used for self-diagnosis.
FLASH RED 
n Please refer diagnosis item.
FLASH GREEN 
n OK
Lamp OFF 3 sec 
Lamp ON 300ms
Lamp OFF 300ms
2 : 
0
3 :
N/A
4 : 
0
5 : 
1
8 : 
0
101 :
N/A
SELF DIAGNOSTIC
Numeral "0" means that no fault was detected.
Numeral "1" means the number of a fault occurrence (1~255).
STANDBY (1) indicator
– 5 –
KV-SR25M53K
RM-W109
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnosis results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
during repairs. When you have completed the repairs, clear the result display to "0".
Unless the result display is cleared to "0", the self-diagnosis function will not be able to detect subsequent faults after
completion of the repairs.
[Clearing the result display]
To clear the result display to "0", press buttons on the remote commander sequentially when the self-diagnostic screen is
displayed, as shown below:
Channel [8]
/  "0"
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent OCP ]
Occurs when an overcurrent on the +B (135V) line is detected by pin 97 of IC001
(A Board). If the voltage of pin 97 of IC001 (A Board) is less than 3.9V, the unit will
automatically go to standby.
[Vertical NG.]
Occurs when an absence of the vertical deflection pulse is detected by pin 116 of
IC001 (A Board).
[IK $AKB%]
If the RGB levels* do not balance within 15 sec after the power is turned on, this error
will be detected by IC001 (A Board). TV will stay on, and indicator will start to Blink 5
times.
[Supply Voltage Protection]
Occurs when IC001 internal Supply Voltage Protection detects less than 4.2V due to
unproper power supply to IC001. TV cuts off high voltage power of anode CRT. No
picture will be detected eg IC607, IC604 go faulty.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects 1K)
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC503
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
C BOARD
IC751 PIN 5
IK
EHTO
RED LED
DISPLAY
SDA1
V.GUARD
SDA
5
F.B-PLS
3
116
45
97
7
A BOARD
FROM
Q511
COLLECTOR
30

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Here you can view online or download Sony KV-SR25M53K Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-SR25M53K TV. Information contained in Sony KV-SR25M53K service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).