A-80 UHF SERVICE MANUAL
- 7 -
Separating the chassis from the unit
1．Remove the 11 screws⑥
2．Remove the solder from the antenna terminal using a soldering iron then lift the unit off⑦
3．Remove the two screws⑧ and remove the antenna connector.
Note：When reassembly the unit to the chassis, be sure to solder the antenna terminal.
CIRCUIT DESCRIPTION
1. Frequency configuration
The receiver utilizes double conversion. The first IF is 45.05MHz and the Second IF is 450 KHz.
The first local oscillator signal is supplied from the PLL circuit.
The PLL circuit in the transmitter generates the necessary frequency.
2．Receiver
The receiver utilizes double conversion, designed to operate in the frequency range DL: 400-430,
DH: 440-480MHz.
⑦
To Next Page
Loading...
