KV-SZ252M50 (serv.man2) — Sony TV Service Manual (repair manual)

Model
KV-SZ252M50 (serv.man2)
Pages
72
Size
8.72 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sz252m50-sm2.pdf
Date

View Sony KV-SZ252M50 (serv.man2) Service Manual online

REVISION HISTORY
BX1L
MODEL
KV-SZ252M50
KV-SZ252M61
KV-SZ252M81
KV-SZ252N50
KV-SZ252N60
PART NO. : 
9-872-963-02
CHASSIS
NO.
SUFFIX
DATE
SUPP / CORR
DESCRIPTION
1
-01
2007/04
_ _
1st Issue
2
-02
2007/05
CORR-1
Changes in:
3-5. Sub Bright Adjustment (
Page 17
)
4-3-1. P MAX/Contrast Adjustment,
4-3-3. Sub Color Adjustment (
Page 36
)
Additional adjustment
4-3-2. WHTL Adjustment (
Page 36
)
TRINITRON 
®
 
COLOR TV
RM-GA002
SERVICE MANUAL
BX1L
CHASSIS
MODEL
COMMANDER   DEST.
CHASSIS NO.
KV-SZ252M50
RM-GA002
E
SCC-V66P-A
KV-SZ252M61
RM-GA002
GE
SCC-V44U-A
KV-SZ252M81
RM-GA002
Middle East SCC-V83H-A
KV-SZ252N50
RM-GA002
Philipines
SCC-V80K-A
KV-SZ252N60
RM-GA002
Philipines
SCC-V80J-A
MODEL
COMMANDER   DEST.
CHASSIS NO.
– 2 –
KV-SZ252M50/M61/M81/N50/N60
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.
A and H2 Board Removal ......................................... 5
1-6.
Picture Tube Removal ................................................ 6
2. WIRE DRESSING
2-1.
Lead Assy, Jumper Wire Dressing at A board ........... 7
2-2.
Lead Assy, Jumper Wire Dressing at A board
(only for Audio 6+6 Non DSP models) .................... 7
2-3.
Wire Dressing at A and H2 board ............................. 7
2-4.
Dressing of Conn Assy, 4P VH ................................. 8
2-5.
Dressing of Conn Assy, 5P YUV ............................... 8
2-6.
Dressing of Conn Assy, 4P VM and
Connector Assy, 5P Front In ...................................... 8
2-7.
Installation and Dressing of Earth Assy Coating ...... 8
2-8.
Installation and Dressing of Earth Assy Coating ...... 9
2-9.
Insertion of Lead Assy, H Static ................................ 9
2-10. Dressing of Conn Assy, 5P Front In .......................... 9
2-11. Dress Lead Assy, Earth and Conn Assy,
5P In with Purse Lock Ø 5 ...................................... 10
2-12. CV Board Connector Assy Wire Dressing .............. 10
2-13. Connector Assy Wire Dressing ................................ 10
2-14. Connector Assy Wire Dressing ................................ 11
2-15. Overall View of Rotation Coil Conn Dressing ....... 11
2-16. Overall View of Lead Assy, G2; Lead Assy, Focus
and Rotation Coil Conn Dressing ........................... 11
2-17. Dress Lead Assy, Speaker to Rotation Coil using
Purse Lock Ø 9 ........................................................ 12
2-18. Dressing of PF Board Conn Assy (for models
with PF board only) ................................................. 12
2-19. Cap Assy, High Voltage Installation ........................ 12
2-20. HV Cap Assy Wire Dressing ................................... 13
2-21. AC Power Cord Wire Dressing ............................... 13
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing Adjustment ...................................... 14
3-2.
Convergence Adjustment ......................................... 15
3-3.
Focus Adjustment .................................................... 17
3-4.
G2 (SCREEN) Adjustments .................................... 17
3-5.
Sub Bright Adjustment ............................................ 17
3-6.
White Balance Adjustment ...................................... 17
Section
Title
Page
Section
Title
Page
4. CIRCUIT ADJUSTMENTS
4-1.
Adjustment With Commander ................................ 18
4-2.
Adjustment Method ................................................ 19
4-3.
Picture Quality Adjustment .................................... 36
4-3-1. P Max/Contrast Adjustment ......................... 36
4-3-2. Sub Color Adjustment ..................................36
4-3-3. Sub Hue Adjustment .................................... 36
4-4.
Geometry Adjustment .............................................37
4-4-1. H-Trapezoid Adjustment ..............................37
4-4-2. Normal Mode 50Hz/60Hz ............................37
4-4-3. Wide Mode 50Hz/60Hz
(V Compression Adjustment)................................ 37
5. DIAGRAMS
5-1.
Block Diagram ......................................................... 38
5-2.
Circuit Boards Location .......................................... 39
5-3.
Schematic Diagram Information ............................. 39
5-3-1. A Board —  (Block 001) ............................... 40
5-3-2. A Board —  (Block 002) ............................... 42
5-3-3. A Board —  (Block  003) .............................. 44
5-3-4. A Board —  (Block 004) ............................... 46
5-3-5. A Board —  (Block 005) ............................... 48
5-3-6. A Board —  (Block 006) ............................... 50
5-3-7. A Board —  (Block 007) ............................... 52
5-3-8  CV Board Schematic Diagram ..................... 53
5-3-9. H2 Board Schematic Diagram ...................... 55
5-4.
Voltage Measurement and Waveform ...................... 57
5-5.
Printed Wiring Boards ............................................. 61
5-6.
Semiconductors ........................................................ 67
6. EXPLODED VIEWS
6-1.
Chassis ..................................................................... 69
7. ELECTRICAL PARTS LIST .......................................... 71
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-SZ252M50/M61/M81/N50/N60
RM-GA002
Diagnosis
Item
Description
• No Power
• +B overcurrent
(OCP)
• Vertical NG.
• IK (AKB)
• Supply Voltage
Protection
Detected
Symptoms
• Power does not turn on.
• No power is supplied to the
TV.
• AC power supply is faulty.
• Power does not turn 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 OCP:0
2 OCP:1 ~ 255
4 VSTOP:0
4 VSTOP:1 ~ 255
5 AKB:0
5 AKB:1 ~ 255
8 SUP:0
8 SUP:1 ~ 255
Probable
Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out (F4101)
(H2 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.
(CV 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
Page of 72
Display

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Here you can view online or download Sony KV-SZ252M50 (serv.man2) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-SZ252M50 (serv.man2) TV. Information contained in Sony KV-SZ252M50 (serv.man2) 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).