CapnDenny1
Student Of The Blues
I bought this a few months back from a Facebook Marketplace add. The PO listed just the cab forsake to use as an extension speaker. I have a half dozen amp chassis that need a cab so I am always on the lookout for and empty cab.
After talking with him he said he had the amp but it was broken. He said he tried to fix it, but the problem was it wouldn't switch the relay to go from clean to gain. So I ended buying the amp and cab.
Upon first examination it was pretty obvious the filter caps were leaking. White goo was coming out of one and the other had some dried white stuff coming out. I just happened to have the large electrolytics on hand, so before even testing it, I replaced the 4 large filter caps.
I am trying learn my son the mysteries of amp repair, so I let him replace the caps. He suggested just cutting the old ones out, and making small loops to attach the new cap to. That way he wouldn't have to remove the pcb from the chassis. It's a bit of a challenge in a HRD. It also prevents having the traces lift when de-soldering the old ones. Fender pcb's are horrible, and the traces lift just by looking at them.
Untitled by Dennis Kelley, on Flickr
So that went well, and we plugged it into a speaker and the amp basically works fine. Except it is stuck in the gain and more gain mode. It won't switch to clean. So I troubleshot it and determined the problem was the pedal jack in the amp. See video. In the video I amp pushing slightly on one of the terminals of the switch. It may have been bad solder, but the switch wasn't acting right either, so I ordered a new one along with a new Reverb tank, and tank bag and cable with RCA plugs.
You can see in the video how they get a single 2 wire cable to do 2 separate functions. Channel switch, and the More Gain function.
Parts will be here in a few days. It just shows that trying to replace a relay that doesn't switch isn't always correct. In this case it was the pedal jack that was bad.
After talking with him he said he had the amp but it was broken. He said he tried to fix it, but the problem was it wouldn't switch the relay to go from clean to gain. So I ended buying the amp and cab.
Upon first examination it was pretty obvious the filter caps were leaking. White goo was coming out of one and the other had some dried white stuff coming out. I just happened to have the large electrolytics on hand, so before even testing it, I replaced the 4 large filter caps.
I am trying learn my son the mysteries of amp repair, so I let him replace the caps. He suggested just cutting the old ones out, and making small loops to attach the new cap to. That way he wouldn't have to remove the pcb from the chassis. It's a bit of a challenge in a HRD. It also prevents having the traces lift when de-soldering the old ones. Fender pcb's are horrible, and the traces lift just by looking at them.
Untitled by Dennis Kelley, on FlickrSo that went well, and we plugged it into a speaker and the amp basically works fine. Except it is stuck in the gain and more gain mode. It won't switch to clean. So I troubleshot it and determined the problem was the pedal jack in the amp. See video. In the video I amp pushing slightly on one of the terminals of the switch. It may have been bad solder, but the switch wasn't acting right either, so I ordered a new one along with a new Reverb tank, and tank bag and cable with RCA plugs.
You can see in the video how they get a single 2 wire cable to do 2 separate functions. Channel switch, and the More Gain function.
Parts will be here in a few days. It just shows that trying to replace a relay that doesn't switch isn't always correct. In this case it was the pedal jack that was bad.
