hopjohn
Silver Face
Troubleshooting a G-6000 and struggling a bit. The unit seems 100% operational. Comes out of protect on startup in about 6 seconds. I've tested every input, AM/FM, even the microphone. They all work. Headphone out works. Speaker outputs work. Lights work. Meters, all of them work. DC offset and bias all seem reasonable. Even checked some voltages here and there on the supply but nothing seemed amiss.
The problem is its doing all of this while one fuse is blown (F602 1A, since pulled). I started to think maybe it was meant to be this way and went ahead with a recap of most the boards and replaced the fuse resistors on the tone amp and mic amp. Later I found a post by LBPete that briefly mentioned that both 1A fuses (F602, F603) should be in use. With that I kept hunting for something wrong. I found that a rectifier D604, a 10D2 is failed closed. Yep closed, basically acting as a jumper. Ok progress, so what else might I look for that would've caused that to happen? ... and what else may have been damaged as result? Help.
The problem is its doing all of this while one fuse is blown (F602 1A, since pulled). I started to think maybe it was meant to be this way and went ahead with a recap of most the boards and replaced the fuse resistors on the tone amp and mic amp. Later I found a post by LBPete that briefly mentioned that both 1A fuses (F602, F603) should be in use. With that I kept hunting for something wrong. I found that a rectifier D604, a 10D2 is failed closed. Yep closed, basically acting as a jumper. Ok progress, so what else might I look for that would've caused that to happen? ... and what else may have been damaged as result? Help.