Panasonic KX-FT21BX Service Manual page 184

1 2 3
A
FAX RX, TEL TALK
B
C
D
E
F
NO PAPER: 5V
PAPER: 0V
G
ON-HOOK: 5V
OFF-HOOK: 0V
H
KX-FT21LA
SCHEMATIC DIAGRAM (ANALOG CIRCUIT)
4 5 6
2V
BELL DETECT
FAX RX, HANDSET TX
12V
2V
KX-FT21LA
7 8
FAX TX
FAX RX
5V
0V
- 158 -
9 10 11
LINE ON/OFF, DIALPULSE
3.3V
0V
2.1V
12