KV-SW342M81 — Sony TV Service Manual (repair manual)

Model
KV-SW342M81
Pages
70
Size
5.25 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sw342m81.pdf
Date

View Sony KV-SW342M81 Service Manual online

TRINITRON 
®
 
COLOR TV
SERVICE MANUAL
BX1L
CHASSIS
MODEL
COMMANDER   DEST.
CHASSIS NO.
KV-SW342M81
RM-GA002 Middle East
SCC-V18X-A
MODEL
COMMANDER   DEST.
CHASSIS NO.
RM-GA002
– 2 –
KV-SW342M81
RM-GA002
KV-SW342M81
RM-GA002
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION ..................................3
1. DISASSEMBLY
1-1.
Rear Cover Removal .................................................. 5
1-2.
Speaker Removal ....................................................... 5
1-3.
Chassis Assy Removal ............................................... 5
1-4.
Service Position ......................................................... 5
1-5.
Terminal Bracket And J3 Board Removal ................. 5
1-6.
F1 Board Removal ..................................................... 5
1-7.
H4 and H7 Boards Removal ...................................... 6
1-8.
A Board Removal ...................................................... 6
1-9.
D3 and F2 Boards Removal ....................................... 6
1-10. Picture Tube Removal ................................................ 7
2. SET-UP ADJUSTMENTS
2-1.
Beam Landing Adjustment ........................................ 8
2-2.
Convergence ............................................................... 9
2-3.
Focus Adjustment .................................................... 11
2-4.
G2 (SCREEN) Adjustments .................................... 11
2-5.
White Balance Adjustment ...................................... 11
3. CIRCUIT ADJUSTMENTS
3-1.
Adjustment With Commander ................................. 12
3-2.
Adjustment Method ................................................. 13
3-3.
Picture Quality Adjustment ..................................... 30
3-3-1. P MAX/Contrast Adjustment ....................... 30
3-3-2. Sub Color  Adjustment ................................. 30
3-3-3. Sub Hue Adjustment ..................................... 30
3-3-4. Sub Hue Adjustment For DVD Mode .......... 31
3-3-5. Sub Hue Adjustment for
                            SW252M60K  &  SW292M60K) ................. 31
3-3-6. Sub Bright Adjustment ................................. 31
3-4.
Geometry Adjustment .............................................. 31
3-4-1. H Trapezoid Adjustment ............................... 31
3-4-2. Normal Mode 50Hz/60Hz ............................ 31
3-4-3. Wide Mode 50Hz/60Hz ................................ 31
Section
Title
Page
Section
Title
Page
4. DIAGRAMS
4-1.
Block Diagram ......................................................... 33
4-2.
Circuit Boards Location .......................................... 34
4-3.
Schematic Diagram Information ............................. 34
4-3-1. C Board Schematic Diagram ........................ 35
4-3-2. A Board —  (Block 001) ............................... 37
4-3-3. A Board —  (Block  002) .............................. 39
4-3-4. A Board —  (Block 003) ............................... 41
4-3-5. J3 Board Schematic Diagram ....................... 42
4-3-6. F and H4 Boards Schematic Diagrams ........ 43
4-3-7 .D3 Board Schematic Diagram ...................... 44
4-3-8 .H7 Board Schematic Diagram ...................... 45
4-3-9. VM Board Schematic Diagram .................... 47
4-3-10.  F2 Board Schematic Diagram ................... 49
4-4.
Voltage Measurement and Waveforms .................... 51
4-5.
Printed Wiring Boards ............................................. 56
4-6.
Semiconductors ........................................................ 62
5. EXPLODED VIEWS
5-1.
Picture Tube and Speaker Bracket .......................... 64
5-2.
Chassis ..................................................................... 65
6. ELECTRICAL PARTS LIST ........................................ 66
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-SW342M81
RM-GA002
Diagnosis
Item
Description
• No Power
• +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.
SELF DIAGNOSTIC FUNCTION
No. of times
STANDBY
Indicator flashes
Does not light
2 times
4 times
5 times
8 times
Diagnostic Result
on screen display
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 Indicator will automatically
begin to flash.
The number of times the STANDBY Indicator 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 Indicator will flash a number of times to indicate the possible cause of the
problem. If there is more than one error, the Indicator 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”.
2. STANDBY INDICATOR BLINKING PROCESS
The example above represents for 4 times blink
Lamp OFF 3 seconds 
Lamp ON 300ms
Lamp OFF 300ms
3. STANDBY INDICATOR ON TV FRONT PANEL
Standby indicator
– 4 –
KV-SW342M81
RM-GA002
[+B overcurrent $OCP%]
Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.
[V-PROTECT]
Occurs when an absence of the vertical deflection pulse is detected by pin 13 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, but there will be 5 times LED blinking.
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture will be
detected. eg: IC602, IC604 go faulty.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC804
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
13
84
32
122
A BOARD
FROM
Q816
COLLECTOR
99
POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR
4. SELF DIAGNOSTIC SCREEN DISPLAY
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
6. SELF-DIAGNOSTIC CIRCUIT
2 : 
000
3 :
000
4 :
000
5 :
001
8 :
002
101 :
N/A
"0" means no fault has been detected.
"1" means a fault has been detected.
"2" means two faults has been detected.
"N/A" means not available for this models.
SELF DIAGNOSTIC
5
8
No.
Description
Method
1.
Display self diagnostic screen
[Display] t [Channel    ] t [Volume    ] t [Power / TV]
Note: The above must be performed while TV is on standby mode.
2.
Stop standby flash
i) Turn off power switch on main.
ii) Unplug power cord from the outlet.
3.
Clear fault result
In Self Diagnostic Screen, press 
[Channel    ] t 
-
Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.
4.
Quit self diagnostic screen
Turn off power switch of remote commander or main unit.
Page of 70
Display

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Here you can view online or download Sony KV-SW342M81 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-SW342M81 TV. Information contained in Sony KV-SW342M81 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).