Panasonic KX-MB772CX - 15.5. HOW TO REPLACE THE FLAT PACKAGE IC

KX-MB262CX/KX-MB772CX
15.
5.
HOW T
O RE
PLA
CE TH
E FLA
T P
ACK
AGE
IC
Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with
some solder (large amount), a
soldering iron and a
cutter knife, you can easily remove the ICs that have more than
100 pins.
15
.5
.1
.
PR
EP
AR
A
TI
ON
•
PbF (: P
b free) S
older
•
Sol
der
ing Iro
n
Tip Temperature of 700
°
F ± 20
°
F (370
°
C ± 10
°
C)
Note:
We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with
less experience could overheat and damage the PCB foil.
•
F
lu
x
Recommended Flux: Specific Gravity
→
0.82.
Type
→
RMA (lower residue, non-cleaning type)
Note:
See
ABOUT LEAD FREE SOLDER (PbF: Pb free)
(P.5.)
15.
5.2
.
FLA
T P
ACK
AGE IC RE
MOV
AL PR
OCE
DUR
E
1.
Put plenty of solder on the IC
pins so that the pins can be c
ompletely covered.
Note:
If the IC pins are
not soldered enough, you may give pressure to the
P
.C. board when cutting the
pins with a cutter.
2.
Make a few cuts into the joint (between the IC and its pins) first and then cut off the pins thoroughly
.
3.
While the solder melt
s, remove it together w
ith the IC pins.
When you attach a new IC to the board, remov
e all solder left on the land with some tools like a soldering wire.
If some solder is left
at the joint on
the board, the new IC
will not be attached properly.