5
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be
damaged easily by static electricity.
Such components commonly are called
Electrostatically Sensitive Devices(ESD). Examples
of typical ESD 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 static electricity.
(1) Immediately before handling any semiconductor
components or semiconductor-equipped
assembly, drain off any electrostatic charge on
your body by touching a known earth ground.
Alternatively, obtain and wear a commercially
available discharging wrist strap device, 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 ESD devices, place the assembly on a
conductive surface such as aluminum foil, to
prevent electrostatic charge buildup or exposure
of the assembly.
(3) Use only a grounded-tip soldering iron to solder
or unsolder ESD device.
(4) Use only an anti-static solder removal devices.
Some solder removal devices not classified as
“anti-static” can generate electrical charges
sufficient to damage ESD devices.
(5) Do not use freon-propelled chemicals. These
can generate electrical charges sufficient to
damage ESD devices.
(6) Do not remove a replacement ESD device from
its protective package until immediately before you
are ready to install it. (Most replacement ESD
devices are packaged with leads electrically
shorted together by conductive foam, aluminum
foil or comparable conductive materials).
(7) Immediately before removing the protective
materials from the leads of a replacement ESD
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 ESD devices.
(Otherwise harmless motion such as the
brushing together of your clothes fabric or the
lifting of your foot from a carpeted floor can
generate static electricity sufficient to damage
an ESD device).
1-3 ESD Precautions
Summary of Contents for DVC-T6300N
Page 10: ...10 2 1 3 NTSC PAL Digital Video Encoder AD7170 Component Descriptions ...
Page 11: ...11 Component Descriptions ...
Page 12: ...12 Component Descriptions ...
Page 14: ...14 Functional Description Component Descriptions ...
Page 15: ...15 Component Descriptions Pinout Diagram ...
Page 18: ...18 Block Diagram Component Descriptions 2 1 5 DIGITAL TO ANALOG STEREO AUDIO CONVERTER CS4391 ...
Page 19: ...19 Component Descriptions ...
Page 20: ...20 Component Descriptions ...
Page 21: ...21 Component Descriptions ...
Page 28: ...28 Component Descriptions ...
Page 30: ...30 Component Descriptions ...
Page 31: ...31 Component Descriptions ...
Page 54: ...54 9 PCB Diagrams 9 1 Main PCB Top ...
Page 55: ...55 PCB Diagrams 9 2 Main PCB Bottom ...
Page 56: ...56 9 3 Front PCB Top 9 4 Front PCB Bottom PCB Diagrams ...
Page 57: ...57 9 5 SMPS PCB Top 9 6 SMPS PCB Bottom PCB Diagrams ...
Page 58: ...58 10 Wiring Diagram ...
Page 65: ...65 11 3 SMPS PCB Schematic Diagram 11 3 SMPS PCB Schematic diagram ...
Page 66: ...66 1 27MHz 2 ROM DATA BUS 3 RAM DATA BUS 4 12C CLK 5 12C DATA 6 HSYNC 12 Oscillograms ...
Page 67: ...67 7 VSYNC 8 BCLK DVD 9 LRCK DVD 10 TSDO 11 MCLK 12 HOST DATA Oscillograms ...
Page 68: ...68 13 HOST CLK 14 HOST CS 15 MC DACO 16 MD DACO 17 VFD DATA 18 VFD STB Oscillograms ...
Page 70: ...70 MEMO ...
