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.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    PC Relay Controller
    Flood Sensor with 12F683
    PIC16F877A Astro Clock
    Clock/Calendar/Alarm with ATtiny12
    Audio noise generator
    power supply with driver
    Sense Fluid Levels With Capacitance
    batteries Li-Poly battery charger with protection Schematic review
    Valve audio amplifier technical specification
    police siren pcb
    Noninverting gain circuit diagram by the MAX4107