Panasonic KX-TS880MXB, Руководство по обслуживанию

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KX-TS880MXB/KX-TS880MXW
10.1.2. RINGER IC (IC1)
Vcc 1
R S L 2
LFI
3
LFO 4
OUT
8
HFI
7
HFO
6
GND
5
LOW FREQ
O
S C
HIGH FREQ
O
S C
POWER S UPPLY
WITH
HY S TERI S I S
AMP
Pin de s cription s
1
2
3
4
5
6
7
8
Vcc
R S L
LFI
LFO
GND
HFO
HFI
OUT
Pin No. Pin name
Power su pply pin
R S L pin
Low-fre qu ency time
con s t a nt connector pin
GND pin
High-fre qu ency time
con s t a nt connector pin
O u tp u t pin
Thi s i s the power su pply pin for the lC. It i s connected to the ( ) pin of
the diode b ridge.
Thi s i s us ed to ch a nge the oper a tion initi a tion c u rrent when connected
to the GND pin.
Thi s i s connected to the time con s t a nt th a t determine s the o s cill a tion
fre qu ency on the w a r b le.
Thi s pin h as the lowe s t potenti a l on the lC. It i s connected to the ( )
pin of the diode b ridge.
Thi s i s connected to the time con s t a nt th a t determine s the o s cill a tion
fre qu ency on the tone s ide (the au di b le fre qu ency s ide).
Thi s i s us ed to connect a piezoelectric bu zzer, or to connect a dyn a mic
s pe a ker thro u gh a tr a n s former.
Name Function