Bass amp

my electric guitar building hobby brought me to a place that i am unsure of.

I have a bass amp ( yamaha 115b, i think) that i got for FREE from one of my frineds. There is one problem; It doesnt work. Im not an elecrtician, but i am a thinker. Because i AM a thinker (and a tinkerer) i check the fuses that i can see without opening it up. both are good.
so i open it up.
inside i see that leading to good fuse (B) is wire (A). Fuse (B) is actually housed in a black fuse box thingie. (sorry i dont know the actual term, im not an electrician) It looks that it was factory installed. from fuse (B) is wice (C) ands that leads directly into Fuse (D) and from that wire (E). Wire (E) was once connected to something. I know what it was connected to, that isnt the issue. the issue is everything from C to E. All of this looks like it was "rigged"
The fuse (D) has a drop of solder on either end and an exposed wire also (wires C and E) this "patch" was all covered by electrical tape.

thats what i see. My question is this: if a fuse is just a wire designed to break when it gets hot, isnt having two fuses in a row be a little redundant? Can i just replace the fuse (D) with a real wire and not have a problem or is there a problem that i may not know about?

when all else fails look at a picture:

all fuses are good. wire E is the broken circut. that is why it is no good.

i doubt that the Fuse D was added to make it easy to deal with. I had to take out 11 screws just to get to it.

here is the best pic i could muster. i hope it helps.

the only markings on fuse D are SOSS7 (i think)

Fuse B has markings of 250v

these markings are on the metal caps that close up the glass tube.

man, i feel so amateur.

so instead of attatching a wire from fuse B to the connection point i should leave fuse D in place and just attatch the end of that to the attachment point?

Doc-T said:

Do you know FOR SURE that fuse D is not blown (open)?

Do you have an ohmmeter to check the continuity from wires C to E?

Click to expand...

there is a visable gap in wire E

im 100% sure no fuse in the entire thing is blown.

i know the picture sucks.

in theory, i should be able to leave the "extra" fuse in and have no problems though right?

i mean isnt a fuse just a wire that breaks at a certian temp?

well... i got it to work.

it kinda sucks. there are more problems than i thought there would be. Tons of crackles and pops. Its like playing through a record.

i think its a connection problem in the input jack. ill see what i can do.