Members leftyjay Posted October 27, 2005 Members Share Posted October 27, 2005 I have a takamine fp360s. It has an Accuracoustic preamp. http://www.takamine.com/?fa=elec_accur I've had the guitar 10 years. Over the past year, I've noticed the volume slowly dropping. Now I can only get about 20% of the volume it use to have. I've gone to the Guitar Center near me and they let me pop in another preamp to make sure that the preamp was the problem. Sure enough, a new preamp sounded fine. Next I asked about getting another preamp to replace the bad one. They named 4 different ones. The cheapest was the Graph-ex preamp ($119.00), then there was the CTB4 preamp ($149.00), then the Accuracoustic preamp ($189.00), and lastly the DSP preamp ($252.00). I asked if someone could just fix my old one? Nobody at Takamine will fix their preamps. They just say to replace it. There isn't alot of resisters and capacitors on the circuit board. I'd think someone could fix this preamp without forking up nearly $200 for a replacement. So if you know anybody that is an electronic tech, I'd be interested if they could go over this preamp and see if they can fix it. Link to comment Share on other sites More sharing options...
Members Rocketman1cds Posted January 1, 2011 Members Share Posted January 1, 2011 Hi, I'm from Germany, Europe. I faced the same problem with mine. I first thought I was crazy, but it really lowered the Volume output to 20% of the one before, So I'm not crazy. :-// It looks like it is a problem of this preamp. Rocketman1cds Link to comment Share on other sites More sharing options...
Members Terry Allan Hall Posted January 1, 2011 Members Share Posted January 1, 2011 Just ask around at music stores for recommendations...otoh, it may turn out to be more cost effective to replace than repair...electronic techs rarely work cheap ($50/hr is not uncommon around here). See if you can find the schematic...that'll save time. Link to comment Share on other sites More sharing options...
Members guildfire Posted January 2, 2011 Members Share Posted January 2, 2011 I have the same model Tak and replaced my bad preamp with a used Accuracoustic on Ebay for less than $100. Link to comment Share on other sites More sharing options...
Members happy-man Posted January 4, 2011 Members Share Posted January 4, 2011 I'm on the east coast (Fort Lauderdale) and am an EE who does analog circuit stuff. If you can get the schematic it would greatly speed up debuging the problem. Link to comment Share on other sites More sharing options...
Members ybnorml Posted February 18, 2011 Members Share Posted February 18, 2011 I also have the same guitar with the same problem at first, now no output at all. Any luck finding a schematic? Link to comment Share on other sites More sharing options...
Members VJLProjects Posted July 8, 2017 Members Share Posted July 8, 2017 Takamine Accuracoustic EQ mine died. After weeks of research and reading various forums I discovered that when these were made there was a capacitor plague from 1999 to 2007. While inspecting mine I noticed leakage on the board. Test with a meter indicates it's bad. So I ordered a few Capacitors . So I'll let you know once I get the parts. Hopefully a fix. I love this guitar.If this works I may be open to repairing these in the USA. Link to comment Share on other sites More sharing options...
Members Mikeo Posted July 8, 2017 Members Share Posted July 8, 2017 Takamine Accuracoustic EQ mine died. After weeks of research and reading various forums I discovered that when these were made there was a capacitor plague from 1999 to 2007. While inspecting mine I noticed leakage on the board. Test with a meter indicates it's bad. So I ordered a few Capacitors . So I'll let you know once I get the parts. Hopefully a fix. I love this guitar. If this works I may be open to repairing these in the USA. In 2000 I had a Chevy that had issues with the computer. We had it fixed, but years later the computer had more issues. The car was old by then and I sold it to a guy that was doing some part time consulting at the place I work. Anyway he had read about capacitor issue with those car computers, and ordered new caps and installed them. The thing ran like a charm after that. He told me about leakage issue and that some of them had started to crown. Link to comment Share on other sites More sharing options...
Members FretFiend. Posted July 8, 2017 Members Share Posted July 8, 2017 I wonder if the original poster ever got his fixed. It was only twelve years ago. Link to comment Share on other sites More sharing options...
Members DeepEnd Posted July 9, 2017 Members Share Posted July 9, 2017 Takamine Graph-EX Accuracoustic preamp used $169.95+shipping: http://www.ebay.com/itm/Takamine-Graph-EX-Pro-Series-Guitar-PreAmp-Hard-to-Find-Accuracoustic-2-/322585048823?hash=item4b1b9136f7:g:D9wAAOSwImRYWCLT Link to comment Share on other sites More sharing options...
Members GPA Posted December 9, 2018 Members Share Posted December 9, 2018 Yes, I just went through this with my NP17C. Did a ton of research and will be replacing the preamp with a CTP3 tube preamp EQ. I first tried to clean the old AccurAcoustic EQ with control/contact cleaner. This did work for a while until the volume dropped and the EQ didn't work any more. I'm going to take apart the old EQ and see if it can be repaired. Replacement preamp EQ's are easy to find on Reverb.com or Ebay. Cheaper than buying a new guitar. I used a paper clip to get the old preamp off. I'd stay away from used, or repaired AccurAcoustic preamps due to the problems they have. Here's where I'm getting my new preamp: https://reverb.com/shop/addicted-to-tone-inc Link to comment Share on other sites More sharing options...
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