| General > General Technical Chat |
| TRAM D201A wiring / mod ? Question |
| (1/1) |
| Crambone:
I picked up a 201A and it’s not receiving good on groups of channels 13-20 & 31-35 so I figu I would look at the synthesizer board. I removed and cleaned black channel control, removed a few crystals and they all checked ok. I also looked at the trimmer caps and they are all working. All the diodes tested good also. When looking at voltages on Pin 1-12 I’m getting some voltages when I shouldn’t and some I should see are missing. So now I’m thinking either this mod (clarifier unlock ?) is causing the voltages? I took a pic of a sketch I did of S4 crystal / manual switch and where the cut wires go. I also took an underside pic. |
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