TS-930s transmit problem
I just repaired a TS-930, that had the RF PA driver transistors blow
up due
to overheating of the power supply.
your VC goes full scale ? ? ! ! ! ! ! ! up to 42 votls ! ! !
it should go to 28 Volts.
it sounds like the power supply pass transistors failed, and shorted
out, ( due to heat )
and put the 40 volts to the RF Final PA. This will blow the driver
transistors.
A common problem in this radio.
are the fans working? it is important that the fan to the power
supply comes on,
or the power supply will over heat, or results I just mentioned will
happen.
what is the serial number to your radio ? ?
Kenwood added to the power supply circuit, later in production,
but it will not help the overheating problem.
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