9.4. Power Supply Circuit
Function:
Power from the AC adaptor passes through a regulating block consisting of IC303.
Circuit Operation:
Q301 is a regulated power supply. The voltage at point A is regulated to 3.6 V by IC303.
The voltage at point B is dropped by D303 and L301 to 3.3V.
The voltage at point C is dropped by D304 to 3.3V.
The voltage at point D is dropped by D305 to 3.3V.
9.5. DTMF Signal
When the DTMF data from the Handset is received, the DTMF signal is output from pin 34 of
IC201 and sent to the line through Q106.
9.6. Handset TX Circuit
MIC
C411
R411
R412
C413
Q410
C414
44 pin of IC201
34 pin of IC201
R152
C151
R151
Q106
T/R.
Summary of Contents for KX-TMC40JX-W
Page 3: ......
Page 7: ...4 2 Time and Date ...
Page 8: ......
Page 9: ...4 3 LCD Contrast ...
Page 10: ...4 4 Making Calls ...
Page 11: ......
Page 12: ...4 5 Answering Calls ...
Page 13: ...4 6 Caller ID Service ...
Page 14: ...4 7 Usin the Caller List ...
Page 15: ...4 8 Viewing the Caller List ...
Page 16: ...4 9 Calling Back from the Caller List ...
Page 18: ...4 12 FLASH Button ...
Page 40: ...10 CPU DATA 10 1 IC201 ...
Page 41: ...11 FLASH MEMORY 11 1 IC300 IC301 ...
Page 42: ...12 MODULE BLOCK DIAGRAM 12 1 LCD MODULE BLOCK ...
Page 45: ...14 TERMINAL GUIDE OF ICs TRANSISTORS AND DIODES 15 CABINET AND ELECTRICAL PARTS ...
Page 46: ...16 ACCESSORIES AND PACKING MATERIALS ...
Page 62: ...CN801 MIC 2 1 24 23 PQUP11143ZA KX TMC40JXW OPERATION BOARD COMPONENT VIEW ...