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In SoCal, here's the schematic:crate_fxt-65_fxt-120_07s194_sch.pdf
I got this with the input jack torn off the board, the effects board that has the Channel/Gain Select & DSP jacks loose inside the chassis, and the chassis somewhat bent on the back where these jacks come through. It had taken a mighty hit there. It was not treated well. Straighten the chassis some, pulled the main circuit board to solder in a new input jack, got new nuts and washers for the effects board jacks and put it all back together hoping for the best. Low volume on clean channel, the volume pot went from off to on and did not increase in volume from that point. Overdrive channel seemed to work well, gobs of volume and distortion of the good kind. Possibly a bad pot but tried cleaning it. Used DeoxIT D5. Similar to this in construction:
No real good place to spritz, and I think I took lube out as the operation felt easier to turn than the pots I did not attempt to clean. Used the smallest of spritzes when I applied it. Then turned the shaft back and forth about twenty times. Also reflowed the solder on this volume pot in the clean channel. I had the mounds of solder left from the input jack that was pulled out of the circuit board. So I just put the legs of the new input jack fully through those mounds. Then took my ungar 25 watt soldering iron and touched the solid mounds until I saw them liquefy and pulled the iron away. Did the same with the legs of the volume pot sticking through the circuit board. Let me know if my technique is wanting. Now I had a working volume pot in the clean channel! Put it back together and dimed it and played. This is one loud amp! I put the distortion on Gain 2 with a good amount and wailed for half hour or so. I noticed my playing become unintelligible, and realized that I had a crackling noise that was causing this. It happened with clean, gain 1 and gain 2. I got my dead blow sledge and gently tapped the chassis on the back when the crackling happened and it would seize to crackle. I worked every pot twenty times, hoping it might get rid of the noise. No deal. This amp is a great amp, but unuseable as is. Where to start to find this?
I got this with the input jack torn off the board, the effects board that has the Channel/Gain Select & DSP jacks loose inside the chassis, and the chassis somewhat bent on the back where these jacks come through. It had taken a mighty hit there. It was not treated well. Straighten the chassis some, pulled the main circuit board to solder in a new input jack, got new nuts and washers for the effects board jacks and put it all back together hoping for the best. Low volume on clean channel, the volume pot went from off to on and did not increase in volume from that point. Overdrive channel seemed to work well, gobs of volume and distortion of the good kind. Possibly a bad pot but tried cleaning it. Used DeoxIT D5. Similar to this in construction:
No real good place to spritz, and I think I took lube out as the operation felt easier to turn than the pots I did not attempt to clean. Used the smallest of spritzes when I applied it. Then turned the shaft back and forth about twenty times. Also reflowed the solder on this volume pot in the clean channel. I had the mounds of solder left from the input jack that was pulled out of the circuit board. So I just put the legs of the new input jack fully through those mounds. Then took my ungar 25 watt soldering iron and touched the solid mounds until I saw them liquefy and pulled the iron away. Did the same with the legs of the volume pot sticking through the circuit board. Let me know if my technique is wanting. Now I had a working volume pot in the clean channel! Put it back together and dimed it and played. This is one loud amp! I put the distortion on Gain 2 with a good amount and wailed for half hour or so. I noticed my playing become unintelligible, and realized that I had a crackling noise that was causing this. It happened with clean, gain 1 and gain 2. I got my dead blow sledge and gently tapped the chassis on the back when the crackling happened and it would seize to crackle. I worked every pot twenty times, hoping it might get rid of the noise. No deal. This amp is a great amp, but unuseable as is. Where to start to find this?
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