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IC401
Q101 AMP Q105 1 1 2 TIP RING 2 SIDE-TONE -CIRCUIT D101 TEL-JACK TR-RLY
VR401
MOD.
6
LPF
COMPRESER
LIMITTER
MAXIMUM DEVIATION ADJUST
TX-MUTE
+ ~ 4 - ~ 3
VR402 AMP
RX-MUTE
AF
9
LPF
EXPANDER
LINE-OUTPUT LEVEL-ADJUST
24
DATA-AMP
59 45 H/S-IN H/S-OUT 38 LINE IN 36 LINE OUT Q106 BELLDETECT 99 IC401, RF 64 Q751, Q752 56 RESET 57 POWER-DOWN 41 C-ID RESET 35
30
29
RX-DATA
SQL PLL-RST PLL-DATA PLL-CLK UNLOCK TX-POWER RX-POWER RLY BELL
97
TX-DATA
RX-MUTE
TX-MUTE
Q301, Q303 POWER DOWN IC301 6V REGULATOR DC-JACK 3 4 DC9V+ GND
24 21 22 23 26 25 20
SQL PLL-RST PLL-DATA PLL-CLK UNLOCK TX-POWER RX-POWER
IC701 (DSP)
Q312 TX-DATA 97 TX-DATA Q313 CHARGE-DET. 60 CHARGE DETECT
CHARGE-CONTACT 1 2 3 + C -
62
CLE
61
ALE
95
WE
83
WP
53
CE
IC702 (FLASH MEMORY)
94
RE
84-91
I/O 0~7 53 54 4.096MHz 65 INUSE LED701 CALL-ID 67 LED704 X701
82
LED702
ANSWER