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Kenwood TK-3402 blinking red only on the programmed channels

I can read and program the radio. But when I turn it on it doesn`t give any sound and doesn`t transmit or receive. The red blinking happens only when i put the channel selector on a programmed channel. if I choose a non programmed channel it gives a solid red (Not blinking)

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The radio's microprocessor and synthesizer are told to show those indications when one of two conditions is met: either the frequency input is outside the operational range of the radio, or the VCO ("voltage controlled oscillator") is above or below its "lock range". The adjustments are physically small, quite fragile, and a very slight rotation in either direction can make a large change in the VCO. It's worth springing for a factory service manual so you can tell for sure where the meter the VCO is metered and how to set it to the correct range. And whilst I can't remember off the top of my head (I don't have that manual myself), many radios have separate Tx and RX VCOs, with separate voltage metering points and voltages to shoot for.
IHope that helps.
73,
Barney KL7HNY

Posted on Jan 02, 2017

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