Read Panasonic KX-TC1005RUC / KX-TC1005RUB / KX-TC1005RUW Service Manual online
24.4. RECEIVER RF IF CIRCUIT
24.4.1. Circuit Operation:
The signal of 40 MHz band (39.775~40.000MHz) which is input from ANT is filtered at DUP801, passes through the filter AMP of40
MHz band input to Pin 41 of IC801. RX VCO which oscillates at L801 and Pins 44 , 45 of IC801 is input to program control at inside
of IC801, 1st local frequency is controlled to assigned channel by serial data which is output from Pins 8 , 49 and 50 of IC201
(CPU), makes loop with Phase Detector Out and RX VCO, and locks 1st local frequency.The input signal, Pin 41 of IC801 and 1st
local frequency output from RX VCO are mixed at inside of IC801, then it passes through CF801, and 1st IF frequency of 10.7 MHz
is generated. Further, 11.150 MHz which is oscillated at X201 and Pins 52 , 53 of IC801 are mixed at inside of IC801 and filtered
at CF802, and 2nd IF 450 Hz is output.
MHz band input to Pin 41 of IC801. RX VCO which oscillates at L801 and Pins 44 , 45 of IC801 is input to program control at inside
of IC801, 1st local frequency is controlled to assigned channel by serial data which is output from Pins 8 , 49 and 50 of IC201
(CPU), makes loop with Phase Detector Out and RX VCO, and locks 1st local frequency.The input signal, Pin 41 of IC801 and 1st
local frequency output from RX VCO are mixed at inside of IC801, then it passes through CF801, and 1st IF frequency of 10.7 MHz
is generated. Further, 11.150 MHz which is oscillated at X201 and Pins 52 , 53 of IC801 are mixed at inside of IC801 and filtered
at CF802, and 2nd IF 450 Hz is output.
39
KX-TC1005RUC / KX-TC1005RUB / KX-TC1005RUW
Click on the first or last page to see other KX-TC1005RUC / KX-TC1005RUB / KX-TC1005RUW service manuals if exist.