Panasonic KX-FT21BX

CIRCUIT OPERATIONS
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KX-FT21LA
ANALOG BOARDDIGITAL BOARD
POWER SUPPLY
OPERATION PANEL
ASIC
LINE
EXT.
TEL
BELL
PAPER
HOOK
HANDSET
SPEAKER
+24V
+5V
RLY
ANA
LOG
SW
LCD
SENSOR
KEY MATRIX
CPU
OP PANEL
I/F
IMAGE
PROCESSING
MOTOR I/F
MOTOR
SENSOR
ROM
1M
SRAM
256k
OSC
I/O
A/D
RESET
REG
RTC
CIS
THERMAL HEAD
+24V
+24V
AC120V
+5V
5V
+5V
MODEM
REG
MOS SW
3.3V
PRINTER
CONTROL
I/F
ROM
SELE
CTOR
VOL
SP
AMP
SP MUTE
HOOK SW
PAPER
PC
CODEC
General Block Diagram