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To TEL_LINE CN1 Off-Hook Line Voltage Bridge Rect D3 Hook Switch Q4, Q5 81 ADCO 102 100 D/A A/D Analog Front End Speech Decoding Speech Encoding Burst Decoding Burst Encoding 26 28 25 40 39 38 RSSI SYCL SYDA SYEN RXDA TXDA 16 18 8 14 13 12 IC2 BMC XTAL X1 10.368 MHz 21 SDA 67 110 4.0V Reg. IC1 4.0V 3.0V Reg. Q2 3.0V 1.8V Reg. Q3 58,61,62,63 1.8V 15,42,50,51,52,53,54 Q902 IN USE LED Q901 SP-PHONE LED 2AP PCB
KX-TCD230 BLOCK DIAGRAM (BASE UNIT)
ANT1 ANT2 31 2 21
A B
Audio
107 Bell/Caller ID Interface HOOK 112 84 Charge Detect BELL Limit Resistor To AC Adaptor 2.5V Reg. CN1 2.5V IC11 EEPROM IC3 Charge Contacts SCL 113 98
ADPCM Codec Filter DSP
RF Interface
RF Module
20 12 66 CPU
SP AMP IC7
SP
BBIC IC4
118
MIC
43,44,60, 2-9,29-32, 121-128
Flash Memory (Program) IC8
3.0V
Key Matrix
13 59