Mic wiring Servicing and alignment

Posted on Feb 7, 2014

The FDK Multi-750e was launched in the UK in 1981. A 2m ham radio multimode tranceiver, at a good price, and with a matching 70cm transvertor controlled from the front panel. There are still a good number around, but many have stopped working because of a very common fault - the potentiometers on the PCB were verry prone to intermittent working -

Mic wiring Servicing and alignment
Click here to download the full size of the above Circuit.

especially on the final amplifier board. If you have one with problems, it really is worth giving all the pots a good clean, and sweeping the boards for `dry` solder joints. Meanwhile I have a copy of the service manual as a series of GIF images which you can view and print out here.

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