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Tubular-shaped
chip jumper
Ordinary jumper
Tubular-shaped chip
VRD-MF 2EEQ00C
|
VWRASAS—
----
Appearance
Electrode
Attach-
PWB
ment
on
PWB
Adhesive
Solder
Symbol! on
wiring
diagram
Table
19—1
SERVICING
OF
LEADLESS
TYPE
RESISTORS
AND
CAPACITORS
Here's
their servicing
method
different
from
that
for the
ordinary type of resistors and capacitors.
Removal of the Tubular-Shaped Chip
1. Using a soldering iron, heat the solder at each terminal of
the chip to get it absorbed
into a braided
wire applied
thereon. See Fig. 19-1.
2. Holding the chip with a pincette, take if off gently using the
soldering
iron's
heat
applied
on
each
terminal
of it. See
Fig. 19-2.
Cautions on removal:
1. When
handling the soldering iron, use a proper force and
keep a careful manner.
2. When
removing the chip, do not use undue force with the
pincette.
3. The
soldering
iron
in use
should
operate
on
AC
mains;
it is best if provided with a thermal control (240° or so).
4. The chip once removed must not be used again.
Attachment of Tubular-Shaped Chip
1. Temporarily solder one terminal of the chip on the copper
foil surface. See Fig. 19—3.
2. Holding one end of the chip with a pincette, completely
solder both terminals of it one after another. See Fig. 19—4.
Cautions on attachment:
1. When
soldering
the
chip
terminals,
do not touch
them
directly with the soldering
tron. The soldering must be as
quick as possible being careful not to hurt the terminals and
the body itself.
2. When
touching the chip with a pincette, hold its terminal
but never its body. See Fig. 19—4.
3. Keep the chip's body
in contact
with
the P.W.B.
when
soldering.
"4. The
soldering
iron
in use
should
operate
on
AC
mains:
it is best if provided
with a thermal control (240° or so).
5. The soldering amount
must be enough but not be outside
the specified area.
General Cautions on Handling and Storage
1. Oxidization on the chip's terminals results in poor soldering.
Do not handle them with bare hands.
2. For storage,
avoid
the following
places where oxidization
will
occur
and
their
capacitance
or
resistance
will
be
deteriorated.
1) Sulfur or chlorine gas floating places
2) Directly sunlit places
3) High temperature/high humidity places
Braided
Tubular chip
wire
Soldering iron
Copper
foil
surface
=
Solder
—_—
P.W.B.
Adhesive
Figure 19—1
Pincette
Tubular chip
;
Soideri
Copper foil
dering iron
surface
P_W.B.
Adhesive
Figure 19—2
|
Soldering iron
Solder
Copper
foil
surface
i
ean
5 cae
P.W.B.
Figure 19—3
Soldering iron
Pincette
Solder
Copper
foi
surface
P.W.B.
Tubular chip
Figure 19—4
—19—
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