SW-3C’s adjustment
(Don’t do this unless you are an expert)
Open the upper cover of the radio's case and you can see that there are three adjustable components on the PCB board, TONE, VC1, and
PWR.
“TONE” adjustable resistor can adjust the side tone volume.
“VC1” adjustable capacitor is used to adjust the side tone frequency. The default side tone frequency of the radio is 600Hz.
“PWR” adjustable resistance adjusts the transmitting power of the radio. The transmitting power of the radio is about 5 watts when the
design of the 12V power supply voltage.
If there is a deviation in the transmitting frequency of the radio station, you can adjust it as follows:
Turn off the power, press and hold the M/V/S button and the RIT/M button at the same time, then turn on the power, wait until the LCD
screen displays the word RESET and then release the button, and then the LCD screen displays the following:
At this time, use a frequency meter to detect the frequency of the TEST point on the PCB board (between IC4 and IC5), turn the knob on
the right side of the radio panel to adjust the frequency until the frequency meter displays 7.000.00MHz, press the M/V/S button for about 2
seconds Just exit.
Wuxi Venus Information Technology co., Ltd
2021-06
