2 Warning
2.1.
Prevention of Electrostatic Discharge (ESD) to Electrostatically
Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec
trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi
num foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brush
ing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient
to damage an ES device).
4
Summary of Contents for Viera TX-P42U20B
Page 21: ...7 4 No Picture 21...
Page 33: ...11 Block Diagram 11 1 Main Block Diagram 33...
Page 34: ...11 2 Block 1 4 Diagram 34...
Page 35: ...G 0 11 3 Block 2 4 Diagram I A I D IG IT A L S IG N A L P R O C E S S O R 35...
Page 36: ...11 4 Block 3 4 Diagram P P O W E R S U P P LY 36...
Page 38: ...38...
Page 40: ...12 3 Wiring 2 40...
Page 43: ...13 2 P Board 1 4 Schematic Diagram A B C D E A P BO ARD LSEP1287BE HB 1 4 F 1 2 3 4 42...
Page 44: ...13 3 P Board 2 4 Schematic Diagram A P BO ARD LSEP1287BE HB 2 4 10 11 12 13 14 15 16 17 18 43...
Page 45: ...13 4 P Board 3 4 Schematic Diagram A B C D E F 1 2 3 4 44 5...
Page 46: ...13 5 P Board 4 4 Schematic Diagram 10 11 12 13 14 15 16 17 18 45...
Page 47: ...13 6 A Board 1 19 Schematic Diagram A A A BO AR D 1 19 IIC B C D E F 1 2 3 4 9 46...
Page 52: ...13 11 Board 6 19 Schematic Diagram A A BO AR D 6 19 STB MPU 46 47 48 49...
Page 54: ...13 12 Board 7 19 Schematic Diagram A A BO AR D 7 1 9 HDMI 55 56 57 58 59 52...
Page 55: ...60 61 62 63...
Page 57: ...69 70 71 72...
Page 60: ...87 8 8 89 90...
Page 61: ...13 16 A Board 11 19 Schematic Diagram A A BO AR D 11 19 A V SW 91 92 93 94 95 96 97 98 99 56...
Page 63: ...FE_Virtual_M odule Peaks COMMON TO 3 19 Analog ASIC 104 105 106 107 108 57...
Page 68: ...140 141 142 143 144 61...
Page 71: ...63...
Page 72: ...13 24 A Board 19 19 Schematic Diagram A A BO AR D 19 19 DVB T C D EM O D U LATO R 64...
Page 75: ...13 27 C2 Board 1 2 Schematic Diagram A A C 2 BO AR D TN PA5095 1 2 ___ I TO A BOARD A32 B 67...
Page 78: ...13 30 SC Board 2 4 Schematic Diagram 10 I 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 70...
Page 79: ...13 31 SC Board 3 4 Schematic Diagram 19 1 20 1 21 1 22 1 23 1 24 1 25 1 26 1 27 71...
Page 80: ...13 32 SC Board 4 4 Schematic Diagram 28 29 30 31 32 33 34 35 36 72...
Page 86: ...P BOARD COMPONENT SIDE LSEP1287BEHB B G 6 5 4 3 2 1 E F H 77...
Page 88: ...14 3 A Board 79...
Page 89: ...A BOARD COMPONENT SIDE A P42U20B A P42U20E A PR42U20 B G 6 5 4 3 2 1 E F H 80...
Page 92: ...14 6 SC Board SC BOARD FOIL SIDE TXNSC11DEK B G 6 5 4 3 2 1 E F H 83...
Page 93: ...SC BOARD COMPONENT SIDE TXNSC11DEK 6 5 4 3 2 1 A I b I C I d I E I F I G I H I I 84...
Page 94: ...14 7 SS Board SS BOARD FOIL SIDE TXNSS11DEK 6 5 4 3 2 1 A I b I C I d I E I F I G I H I I 85...
Page 95: ...SS BOARD COMPONENT SIDE TXNSS11DEK...
Page 96: ......
Page 98: ...15 1 2 Exploded View 2 88...
Page 99: ...89...
Page 100: ...15 1 4 Packing 2 90...
