Hi Guys, I am new here, I hope to find some help from you. I have a Fernandez FRB-80 bass from 1989. It belongs to a friend who asked me for help to rewire it. He lend the bass to another guy who literally made a mess with it trying to repair some malfunction.
After many hours of research and work i was able to rewire it as it supouse to be (wires from preamp, grounds, pickups and battery), checked continuity on pots and wires, and integrity of them, solder joints and jack. But I can not still make it sound.
Inspecting the preamp board (F.G.I. Technologies TC-9500), it seems some element is missing, but my knowledge of electronics does not get so far, to deduce or identify if i am rigth and what is missing there.
Can anyone confirm me preamp color wires and give some guide about the board? I am posting a picture of the board.
RED -> Battery
RED, ORANGE, YELLOW -> Bass
PURPLE, GREEN, BLUE -> Treble
GRAY -> Lead to jack
WHITE -> Lead to Volume
BLACK -> GROUND
Changing the Preamp is not an option as long as the bass has a lot of sentimental an historic value for my friend. He record and perform with it his first album with his iconic rock band here in México, so he wants to preserve all as original as posible.
Thank you for reading and any help you can provide.
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