Block Diagram (Handset); Circuit Operation (Handset); Outline; Reset Circuit - Panasonic KX-TC2100BXB Service Manual

16 CIRCUIT OPERATION (HANDSET)

16.1. Outline

Handset consists of the following ICs as shown in BLOCK DIAGRAM (HANDSET) (P.38).
• CPU: IC701
− Forming/analyzing all data signals (ACK or CMD signal)
− All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge/Battery Low)
− RAM for keeping the data (CH Number, ID Code, etc.)
• RF IC: IC801
− PLL Oscillator
− Detection
− Compress/Expander
− 1st/2nd mixer
− Amplifier for transmission and reception

16.2. Reset Circuit

The power of handset is supplied by battery.
Whenever the battery is recharged or inserted, the impulse at CHG+ becomes Reset signal through Q704, and it is sent to CPU.
KX-TC2100BXB / KX-TC2100BXS / KX-TC2100BXT / KX-TC2100BXW
<Fig. 4>
<Fig. 5>
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