1-5
Precautions
Service Manual
1.3 ESD Precautions
Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called
“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field
effect transistors, and semiconductor “chip” components.
The techniques outlined below should be followed to help reduce the incidence of component damage caused by
static electricity.
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially avail-
able wrist strap device, which should be removed for your personal safety reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as
aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assem-
bly.
3. Use only a grounded tip soldering iron to solder or desolder ESDs.
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can
generate electrical charges sufficient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to dam-
age ESDs.
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a compa-
rable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the pro-
tective material to the chassis or circuit assembly into which the device will be installed.
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until com-
pletely plugged or soldered into the circuit.
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing
together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to
damage an ESD.
Summary of Contents for scx-4100 series
Page 13: ...2 6 Reference Information Samsung Electronics Service Manual 2 4 2 A4 2 Pattern ...
Page 14: ...2 7 Samsung Electronics Reference Information Service Manual 2 4 3 A4 IDC 5 Patten ...
Page 15: ...2 8 Reference Information Samsung Electronics Service Manual MEMO ...
Page 21: ...3 6 Specifications Samsung Electronics Service Manual MEMO ...
Page 23: ...4 2 Summary of Product Samsung Electronics Service Manual 4 1 2 Rear View ...
Page 24: ...4 3 Samsung Electronics Summary of product Service Manual 4 1 3 Control Panel ...
Page 25: ...4 4 Summary of Product Samsung Electronics Service Manual 4 2 System Layout SCAN PART ...
Page 39: ...4 18 Summary of Product Samsung Electronics Service Manual MEMO ...
Page 57: ...5 18 Disassembly and Reassembly Samsung Electronics Service Manual MEMO ...
Page 93: ...7 28 Troubleshooting Samsung Electronics Service Manual MEMO ...
Page 110: ...9 9 9 1 Samsung Electronics Block Diagram Service Manual 9 Block Diagram ...
