Service Manuals, User Guides, Schematic Diagrams or docs for : TOSHIBA LCD 20WL56 TOSHIBA_20WL56-20-inch

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TOSHIBA_20WL56-20-inch


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TOSHIBA 20" TFT
   (20WL56)

SERVICE MANUAL




RELEASE DATE:   08.09.2005
PREPARED BY:    VESTEL ELECTRONICS
THIS PAGE IS INTENTIONALLY LEFT BLANK
                                                            TABLE OF CONTENTS
1.     INTRODUCTION ...................................................................................................................................... 1
2.     TUNER...................................................................................................................................................... 1
3.     IF PART (TDA988X) ................................................................................................................................. 1
4.     MULTI STANDARD SOUND PROCESSOR ............................................................................................ 1
5.     AUDIO AMPLIFIER STAGE WITH TPA3002D2 ...................................................................................... 2
6.     POWER .................................................................................................................................................... 2
7.     MICROCONTROLLER SDA55XX............................................................................................................ 2
8.     SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16 .................................................................. 3
9.     CLASS AB STEREO HEADPHONE DRIVER TDA1308 ......................................................................... 3
10.    SAW FILTERS.......................................................................................................................................... 3
11.    IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ....................................................................... 4
   11.1.   LM1117.............................................................................................................................................. 4
   11.2.   LM2576.............................................................................................................................................. 5
   11.3.   LM317T ............................................................................................................................................. 6
   11.4.   ST24LC21 ......................................................................................................................................... 7
   11.5.   TEA5114A ......................................................................................................................................... 8
   11.6.   TEA6415............................................................................................................................................ 9
   11.7.   VPC3230D....................................................................................................................................... 10
   11.8.   SDA55XX (SDA5550)...................................................................................................................... 12
   11.9.   TPA3002D2 ..................................................................................................................................... 13
   11.10. TDA9885/86 .................................................................................................................................... 15
   11.11. TDA1308 ......................................................................................................................................... 16
   11.12. PI5V330........................................................................................................................................... 17
   11.13. GM6015........................................................................................................................................... 18
   11.14. MST9883 ......................................................................................................................................... 19
   11.15. M74HC4052 .................................................................................................................................... 21
   11.16. MC34063 ......................................................................................................................................... 22
   11.17. MSP34X0G...................................................................................................................................... 23
   11.18. DS90C385 ....................................................................................................................................... 26
   11.19. NDS8947 ......................................................................................................................................... 27
12.    SERVICE MENU SETTINGS ................................................................................................................. 28
   12.1.   OPTIONS MENU SETTINGS.......................................................................................................... 29
   12.2.   APS WSS TEST MENU .................................................................................................................. 34
13.    BLOCK DIAGRAM.................................................................................................................................. 35
14.    CIRCUIT DIAGRAMS ............................................................................................................................. 36




                                                                                 i
20" TFT TV Service Manual                                                                                                                          08/09/2005
1. INTRODUCTION
20" TFT-LCD TV is a Progressive TV control system based on the



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