How To Replace A Flat Package Ic - Panasonic KX-TDA0174 Service Manual

CODEC EXTENTION
PORT
EXT12
CODECIC251
EXT13
EXT14
EXT15

10. HOW TO REPLACE A FLAT PACKAGE IC

10.1. PREPARATION
- PbF (: Pb free) Solder
- Soldering Iron
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.
- Flux
Recommended Flux: Specific Gravity
Type RMA (lower residue, non-cleaning type)
PIN No. SIGNAL
NAME
SO1_1
SO1_0 BELL12
SB1_2
SB1_1
SB1_0
SI1_1 HOOK12
SI1_0 DT_EST12
SO2_1
SO2_0 BELL13
SB2_2
SB2_1
SB2_0
SI2_1 HOOK13
SI2_0 DT_EST13
SO3_1
SO3_0 BELL14
SB3_2
SB3_1
SB3_0
SI3_1 HOOK14
SI3_0 DT_EST14
SO4_1
SO4_0 BELL15
SB4_2
SB4_1
SB4_0
SI4_1 HOOK15
SI4_0 DT_EST15
34
I/O ACT DESCRIPTIONS
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
O
O H Ringer output
O
O H
O
I L Off-hook detection
I H DTMF detection
0.82.
NOTES
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up
L (Fixed)
+5V pull up
+5V pull up