Hi,
New here but have browsed for a while. I have learned a lot just reading now I want to try to fix an old amp I picked up for nothing.
My skills are beginner. I can solder well, and having had a good guide restored a Fisher type tube AMP to working condition. (had a good schematic).
Subject:Orion Cobalt 265 XP
Amp looks new out side and in.
Problem: Blows fuse upon putting power to it, this is without speaker or amp turn on being connected.
Observations on my part: Does not blow power supply fuse when amp fuse is removed. I have a DC amp meter and it begins to immediately draw enough to pop a 15amp fuse I used for testing. If I remove power quickly it does not blow the fuse.
The unit has no internal damage that I can see. No burn or black marks nothing dirty, distorted, obviously grounded or dead short arcs.
It only blows after the fuse is in, before the switch on is even added.
I will post photos of the board front and back.
Looking for guidence as I work through this. Its obvious something is drawing a large ammount of power, at first I thought it may have been a short, but I see no evidence of any arcing.
Thank you guys.
Matt.
New here but have browsed for a while. I have learned a lot just reading now I want to try to fix an old amp I picked up for nothing.
My skills are beginner. I can solder well, and having had a good guide restored a Fisher type tube AMP to working condition. (had a good schematic).
Subject:Orion Cobalt 265 XP
Amp looks new out side and in.
Problem: Blows fuse upon putting power to it, this is without speaker or amp turn on being connected.
Observations on my part: Does not blow power supply fuse when amp fuse is removed. I have a DC amp meter and it begins to immediately draw enough to pop a 15amp fuse I used for testing. If I remove power quickly it does not blow the fuse.
The unit has no internal damage that I can see. No burn or black marks nothing dirty, distorted, obviously grounded or dead short arcs.
It only blows after the fuse is in, before the switch on is even added.
I will post photos of the board front and back.
Looking for guidence as I work through this. Its obvious something is drawing a large ammount of power, at first I thought it may have been a short, but I see no evidence of any arcing.
Thank you guys.
Matt.