This regarding a big problem I got into with my FT-757 GXII. I use it with ATU FT-757AT. The cable to connect band data and to supply the antenna tuner is homebrew where the wire from pin 7 (rig side, same number on tuner side) is exposed with no insultation for some 7mm from the connector (rig side). I accidentally shorted this wire to ground while connecting my radio to station ground
. This has shutdown the rig - no display, nothing. On switch on the meter needle goes full scale.
This pin 7 supplies 13 vdc to the antenna tuner and it has, I guess, 500mA limit. Could you tell what part/component of the circuit in the radio is damaged?
I love this radio and wish it comes alive again. I promise I will take utmost care of it if it come to lfe again !
I have the circuit diagram for the radio.
Prem VE6XMX (also, Vu2XMX)