1-2 Servicing Precautions
1. Servicing precautions are printed on the
cabinet. Follow them.
2. Always unplug the unitÕs AC power cord from
the AC power source before attempting to: (a)
Remove or reinstall any component or
assembly, (b) Disconnect an electrical plug or
connector, (c) Connect a test component in
parallel with an electrolytic capacitor.
3. Some components are raised above the printed
circuit board for safety. An insulation tube or
tape is sometimes used. The internal wiring is
sometimes clamped to prevent contact with
thermally hot components. Reinstall all such
elements to their original position.
4. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the portion around
the serviced part has not been damaged.
5. Check the insulation between the blades of the
AC plug and accessible conductive parts
(examples: metal panels, input terminals and
earphone jacks).
6. Insulation Checking Procedure: Disconnect the
power cord from the AC source and turn the
power switch ON. Connect an insulation
resistance meter (500V) to the blades of the AC
plug.
The insulation resistance between each blade
of the AC plug and accessible conductive parts
(see above) should be greater than 1 megohm.
7. Never defeat any of the B+ voltage interlocks.
Do not apply AC power to the unit (or any of
its assemblies) unless all solid-state heat sinks
are correctly installed.
8. Always connect a test instrumentÕs ground
lead to the instrument chassis ground before
connecting the positive lead; always remove
the instrumentÕs ground lead last.
9. When some parts inside the optical engine
(except lamp) are damaged, replace the whole
optical engine.
Precautions
Samsung Electronics
1-3
Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between
the servicing and safety precautions, always follow the safety precautions.
Warning2: An electrolytic capacitor installed with the wrong polarity might explode.
Summary of Contents for SP403JHPX
Page 11: ...3 2 Samsung Electronics MEMO ...
Page 60: ...Schematic Diagrams 12 3 Samsung Electronics 12 3 MAIN POWER Power Line Signal Line ...
Page 61: ...Schematic Diagrams 12 4 Samsung Electronics 12 4 PROSCAN 1 Power Line Signal Line ...
Page 62: ...Schematic Diagrams 12 5 Samsung Electronics 12 5 PROSCAN 2 Power Line Signal Line ...
Page 63: ...Schematic Diagrams 12 6 Samsung Electronics 12 6 PROSCAN 3 Power Line Signal Line ...
Page 64: ...Schematic Diagrams 12 7 Samsung Electronics 12 7 PROSCAN 4 ...
Page 65: ...Schematic Diagrams 12 8 Samsung Electronics 12 8 MAIN u COM Power Line Signal Line ...
Page 67: ...Schematic Diagrams 12 10 Samsung Electronics 12 10 MAIN A V TERMINAL Power Line Signal Line ...
Page 71: ...Schematic Diagrams 12 14 Samsung Electronics 12 14 MAIN PIP Power Line Signal Line ...
Page 72: ...Schematic Diagrams 12 15 Samsung Electronics 12 15 MAIN SUB MASTER REMOCON PRE AMP ...
Page 73: ...ELECTRONICS Samsung Electronics Co Ltd MAY 1999 Printed in Korea 3M51A 0302 ...
Page 74: ...www s manuals com ...
