Hi, I've got a VOX AC15 guitar amplifier. A conductive path between two terminals developed which caused the pcb to fry up and all the fuses were blown and also a high watt resistor was blown.
The trace which is lifted just seems to be connected to the ground plane and I don't really understand the purpose of it, maybe saving copper during the etching process? Anyway my first question is can I just removed that piece of lifted trace?
Second question is what do I do with the burned bit of pcb, its conductive. Should I cut out a hole or dig out the burned bit until its not conductive anymore. The pcb is single sided. The two terminals which are effected is TT5 and TT7.
I have included a schematic of the amplifier. I have checked the components near the vicinity, I couldn't find any components which are faulty other than the 82ohm resistor (next to terminal TT5 marked as R72) which was blown. Any more tips on what to look for would be really appreciated.
The whole area was blackened and the pictures were taken after cleaning the are with IPA. I have included a pdf of the whole schematic.
Thanks in advance for the help.
The trace which is lifted just seems to be connected to the ground plane and I don't really understand the purpose of it, maybe saving copper during the etching process? Anyway my first question is can I just removed that piece of lifted trace?
Second question is what do I do with the burned bit of pcb, its conductive. Should I cut out a hole or dig out the burned bit until its not conductive anymore. The pcb is single sided. The two terminals which are effected is TT5 and TT7.
I have included a schematic of the amplifier. I have checked the components near the vicinity, I couldn't find any components which are faulty other than the 82ohm resistor (next to terminal TT5 marked as R72) which was blown. Any more tips on what to look for would be really appreciated.
The whole area was blackened and the pictures were taken after cleaning the are with IPA. I have included a pdf of the whole schematic.
Thanks in advance for the help.
Attachments
-
162.7 KB Views: 27
-
187.1 KB Views: 24
-
106.7 KB Views: 28
-
4.1 MB Views: 13
Last edited: