Panasonic BT-M1950Y Service Manual page 16

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REPLACEMENT OF CHIP COMPONENT
.CAUTIONS
1. Avoid heating for more than 3 seconds.
2. Do not rub the electrodes and the resist parts of the pattern.
3. When removing a chip part, melt the solder adequately.
4. Do not reuse a chip part after removing it.
.SOLDERING IRON
1.
Use a high insulation soldering iron with a thin pointed end of it.
2. A 30w soldering iron is recommended for easily removing parts .
• REPLACEMENT STEPS
1. How to remove Chip parts
•Resistors, capacitors, etc
(1) As shown in the figure, push
the part with tweezers and
alternately melt the solder at
each end.
TWEEZERS (2) Shift with tweezers and remove
!
the chip part.
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•Transistors, diodes, variable resistors, etc
(1) Apply extra
lead.
solder to each
SOLDER
(2) As shown in the figure, push the
part with tweezers and
alternately melt the solder at
each lead. Shift and remove the
chip part.
Note: After removing the part, remove remaining solder from the pattern.
2. How to install Chip parts
•Resistors, capacitors, etc
(1) Apply solder to the pattern
as indicated in the figure.
•Transistors, diodes, variable resistors, etc
(2) Grasp the chip part with
tweezers and place it on the
solder. Then heat and melt the
solder at both ends of the chip
part.
TWEEZERS
P
!
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l
(1)
Apply solder to the
pattern as indicated in the
figure.
(2) Grasp the chip part with (3) First solder lead A as (4) Then solder leads B and C.
tweezers and place it on
the solder.
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indicated in the figure.
~A)
a/l//lJ~(B)
~(C)
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