Panasonic KX-FT21BX

KX-FT21LA
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Analog Unit Block Diagram
C35
C1
C2
Analog Board
Digital Board
R3
R1
R2
R4
R37
R32
CN4
PC
T1
RLY1
RLY1
+24V
POS1
SA1
SA2
LINE-RLY
BELL
HANDSET
CN5
CN3
CN2
VOL
MODEM
ASIC (IC1)
Analog Front End
(IC5)
SW2
SW1
PAPER
HOOK
H/STX
H/SRX
SPOUT
SPEAKER
SP AMP
SP-MUTE
H/SRX ENB
TEL RX ENB
LINERX
LINETX
MTX ENB
H/STX MUTE
MOM RX ENB
T
T1
R
R1