Reversed polarity on soundstream lil wonder 4 series amplifier

[shandev]

here

[shandev]

where i solder is the positive going straight to the filter caps I see no large diode to protect rv=everse polarity i assume there is some mechanism that acted like said diode to blow the fuse

[shandev]

i will send more pics later because the site isn't allowing me due to space I will make a website an provide the link

[Jazz P Bass]

What in the heck is that blob????

[shandev]

here is the links to the picutres
https://ibb.co/R2Q2wTX
https://ibb.co/2np204G
https://ibb.co/s5VyK0v
https://ibb.co/PF3xD2Q

[shandev]

here is the links to the picutres
https://ibb.co/R2Q2wTX
https://ibb.co/2np204G
https://ibb.co/s5VyK0v
https://ibb.co/PF3xD2Q

u can see where i solder back the positive fuse like strip

[shandev]

Wjat in the heck is that blob????

lmaooo that's where I sloder it back it broke open acted like a fuse

[Jazz P Bass]

I hate to spoil the party but I do believe that you are in way over your head with this unit.
An experienced tech would have one heck of a time with that unit, seeing that the power polarity was reversed and not having a schematic.

[J M Fahey]

Same here.
Sorry.

[Jon Snell]

A basic here has been forgotten or has not even been discovered, which is a worry, a fuse is designed to blow and it blows at a pre determined value.

A mountain of poorly administered solder, is not remotely a replacement for a fuse but dangerous!

[Jazz P Bass]

"u can see where i solder back the positive fuse like strip"
So it appears that the circuit trace itself became a fuse.
Ouch.

[shandev]

re

A basic here has been forgotten or has not even been discovered, which is a worry, a fuse is designed to blow and it blows at a pre determined value.

A mountain of poorly administered solder, is not remotely a replacement for a fuse but dangerous!

correct but I gust solder it back to see if the amp will come on but I plant to use a external fuse if I get it to work and also its not really a fuse i believe it is just the trace on the board that melted snaped so yeah I see what your saying si correct

[shandev]

i took some electronics in school i would just look to see if I can get a schematic some where online hopefully an do some testing

[nevetslab]

I hate to spoil the party but I do believe that you are in way over your head with this unit.
An experienced tech would have one heck of a time with that unit, seeing that the power polarity was reversed and not having a schematic.

Essentially what I said in Post #2. Trying to tackle something this complex that's built with surface mount components as your first project.....life is too short for such a pursuit. Take it to someone who services this sort of gear, and let them tell you what we're trying to tell you. Sorry.

[g1]

That is the biggest trace in the whole amp. For it to get burnt, there must be some very major damage elsewhere. Hooking up with reverse polarity could not cause that trace to burn like that.