Sharp DV-SL10H, Service Manual

Page: 7 / 65

1-4-3
DVD_NOTE
2. Installation
(1) Using desoldering braid, remove the solder from the
foil of each pin of the flat pack-IC on the CBA so you
can install a replacement flat pack-IC more easily.
(2) The “ ” mark on the flat pack-IC indicates pin 1. (See
Fig. S-1-7.) Be sure this mark matches the 1 on the
PCB when positioning for installation. Then presol-
der the four corners of the flat pack-IC. (See Fig. S-
1-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a "
" mark.
Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electrostatic
charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1M
Ω
) that is properly
grounded to remove any static electricity that may be
charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate with
proper grounding (1M
Ω
) on the workbench or other
surface, where the semi-conductors are to be placed.
Because the static electricity charge on clothing will not
escape through the body grounding band, be careful to
avoid contacting semi-conductors with your clothing.
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
< Correct >