Matsushita Electric KX-TC1461LAB, Service Manual

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24 903.25 927.05 927.05 903.25
25 903.30 927.10 927.10 903.30
26 903.35 927.15 927.15 903.35
27 903.40 927.20 927.20 903.40
28 903.45 927.25 927.25 903.45
29 903.50 927.30 927.30 903.50
30 903.55 927.35 927.35 903.55
31 903.60 927.40 927.40 903.60
32 903.65 927.45 927.45 903.65
33 903.70 927.50 927.50 903.70
34 903.75 927.55 927.55 903.75
35 903.80 927.60 927.60 903.80
36 903.85 927.65 927.65 903.85
37 903.90 927.70 927.70 903.90
38 903.95 927.75 927.75 903.95
39 904.00 927.80 927.80 904.00
40 904.05 927.85 927.85 904.05
11. BLOCK DIAGRAM (Base Unit)
12. CIRCUIT OPERATION
12.1. Outline
Base unit consists of the following ICs as shown in BLOCK DIAGRAM.
- CPU:IC3
- Controlling the whole system
- Forming/analyzing all data signals (ACK, CMD signal etc.)
- All interfaces (ex: LED, KEY, Detector Circuit (Charge/ Power Down)
- RF IC:IC1
- PLL Oscillator
- Compress/ Expander
- Amplifier for transmission and reception
- Additionally
- Power Supply Circuit
- Reset Circuit
- Charge Circuit
- Telephone Line Interface Circuit
12.2. Power Supply Circuit
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