KX-TC1801B - Panasonic Telephone Service Manual (repair manual). Page 53

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26 SCHEMATIC DIAGRAM (Base Unit)
TX
RX
3.5V
3.5V
3.6V
4.2V
6.2V
3.6V
490mVp-p
150mVp-p
440mVp-p
220mVp-p
160mVp-p
160mVp-p
48mVp-p
13mVp-p
600mVp-p
Output
140mVp-p
(-25dBm/600   )
Input 1.1kHz
IC301
IC551
IC501
KX-TC1801B
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