Denon DVM-1805 Service Manual page 9

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2. Installation
3 7 63 1515 0
(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 "I" 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
presolder 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 "
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CBA
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" mark.
Fig. S-1-7
Presolder
Flat Pack-IC
Fig. S-1-8
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Instructions for Handling
8
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electro-
static charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is prop-
erly grounded to remove any static electricity that may
be charged on the body.
2. Ground for Workbench
(4) Be sure to place a conductive sheet or copper plate
with proper grounding (1MΩ) 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 ground-
ing band, be careful to avoid contacting semi-con-
ductors with your clothing.
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3 6 7 1 3
< Correct >
1MΩ
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- 9 -
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
CBA
Grounding Band
CBA
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Conductive Sheet or
Copper Plate
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9 9
2 8 9 9
1MΩ