1-3-3
NOTE_1
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 “
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.
Instructions for Handling
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 (1M
Ω
) that is prop-
erly 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 cloth-
ing will not escape through the body grounding band,
be careful to avoid contacting semi-conductors with
your clothing.
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
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1M
Ω
1M
Ω
< Correct >
Summary of Contents for 27C-450
Page 21: ...Main 1 6 Schematic Diagram 1 8 3 1 8 4 HE341SCM1 ...
Page 22: ...Main 2 6 Sensor Schematic Diagram 1 8 5 1 8 6 HE341SCM2 ...
Page 23: ...Main 3 6 Schematic Diagram 1 8 7 1 8 8 HE341SCM3 ...
Page 24: ...Main 4 6 Jack Schematic Diagram 1 8 9 1 8 10 HE341SCM4 ...
Page 26: ...HE341SCM6 1 8 13 1 8 14 Main 6 6 Schematic Diagram ...
Page 29: ...1 8 19 1 8 20 Jack CBA Top View Jack CBA Bottom View BHE470F01014 C ...
Page 52: ...3 1 1 HE240FEX A1X EXPLODED VIEWS Front Panel ...
Page 69: ...27C 450 HE341FD ...