Bassblaster
Super Member
i got a Sherwood RV-5030R AV receiver from the mid 90's from a friend he wants repaired, ive had it for 3 months because i broke my hand about 2 months ago but im good now so today i pulled it back out and done some tests. its a 5 channel unit with all discrete outputs. i cant find a service manual for it so i cant get to crazy with it. i pulled and tested every output transistor and they all tested good. i pulled the 6A rectifier diodes, all fine, pulled the 4 1N4007's for the standby circuit and they tested fine. even tested some other random diodes in the power supply part and everything has been fine. so i am completely lost of what keeps blowing the main 5A fuse. there's no solder bridges on anything. the only thing i haven't tested are the emitter resistors, drivers and some (Zener??) diodes around the amplifier. right now i have the 4 regulators from the power supply pulled, 2x 7806, 1 7815 and 1 7915. i cant think of anything else that can draw that kind of current without burning up.
any thoughts? Need pics of anything just post.
any thoughts? Need pics of anything just post.