Block Diagram (Base Unit); Circuit Operation (Base Unit); Outline - Panasonic KX-TC2106UAB Service Manual

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KX-TC2106UAB / KX-TC2106UAS / KX-TC2106UAT / KX-TC2106UAW

14 CIRCUIT OPERATION (BASE UNIT)

14.1. Outline

Base unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.31).
• • • • CPU: IC201
− − − − Controlling the whole system
− − − − Forming/analyzing all data signals (ACK, CMD signal etc.)
− − − − All interfaces (ex: LED, Detector Circuit (Charge/ Power Down))
• • • • RF IC: IC401
− − − − PLL Oscillator
− − − − Detection
− − − − Compress/ Expander
− − − − 1st/2nd mixer
− − − − Amplifier for transmission and reception
− − − − DC 5.5V regulator
− − − − Reset Circuit
• • • • Additionally,
− − − − Power Supply Circuit
− − − − Charge Circuit
− − − − Telephone Line Interface Circuit
32

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