geoffbyrne Posted August 2, 2013 Share Posted August 2, 2013 Can anyone point me in the direction of a circuit diagram/pictures of the original Yamaha TRB 5 string pre? Ta. G. Quote Link to comment Share on other sites More sharing options...
Myke Posted August 2, 2013 Share Posted August 2, 2013 What's the issue you're having? Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted August 2, 2013 Author Share Posted August 2, 2013 The original has been replaced. I'll be getting it soon & may wish to revert. Currently the solo'd pups are not humbucking - I was lead to believe there were dummy coils etc. Just need to know more, really. G. Quote Link to comment Share on other sites More sharing options...
ikay Posted August 2, 2013 Share Posted August 2, 2013 (edited) Can't find a service manual for the TRB series I but the TRB series II manual (with circuit diagram) can be found here: [url="http://www.yamaha.com/yamahavgn/Documents/Guitars/TRB5II_5IIF_E.pdf"]http://www.yamaha.co...B5II_5IIF_E.pdf[/url] TRB5P series I circuit diagramd and parts list can be found here: [url="http://s55.photobucket.com/user/i2k92/media/schemo/cdtrb456p.jpg.html"]http://s55.photobuck...rb456p.jpg.html[/url] [url="http://s55.photobucket.com/user/i2k92/media/schemo/cdtrb456pcmp.jpg.html"]http://s55.photobuck...56pcmp.jpg.html[/url] This post on TB is about pickup wiring for the TRB 1005 and mentions a dummy coil. Not sure if this is relevant to the series I or your particular issue: [url="http://www.talkbass.com/forum/f38/yamaha-trb-1005-aguilar-preamp-wiring-issues-572756/"]http://www.talkbass.com/forum/f38/yamaha-trb-1005-aguilar-preamp-wiring-issues-572756/[/url] Realise none of this is what you really need but on the offchance it may be of some help. Edited August 2, 2013 by ikay Quote Link to comment Share on other sites More sharing options...
Myke Posted August 2, 2013 Share Posted August 2, 2013 Oh. Unfortunately this isn't an area of expertise for me so I can't really help out. If you need photos I might be able to get some for you Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted August 3, 2013 Author Share Posted August 3, 2013 Many thanks for the info & pointers to those who've replied. Once I have the original, I'll decide what I'm going to do. I'm not sure if I should revert, as I've read the original pre was a bit noisey. G. Quote Link to comment Share on other sites More sharing options...
Myke Posted August 3, 2013 Share Posted August 3, 2013 [quote name='geoffbyrne' timestamp='1375523192' post='2162451'] Many thanks for the info & pointers to those who've replied. Once I have the original, I'll decide what I'm going to do. I'm not sure if I should revert, as I've read the original pre was a bit noisey. G. [/quote] Mine has a hum that is only heard when recording or going through a PA. Bit of a pain tbh. Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted August 3, 2013 Author Share Posted August 3, 2013 Myke, do your pickups hum when solo'd? G. Quote Link to comment Share on other sites More sharing options...
ikay Posted August 3, 2013 Share Posted August 3, 2013 The pre on my series 1 is fine, maybe just a tiny bit of hiss when treble is fully boosted, otherwise quiet. Pickups definitely don't hum when solo'd. Only thing which is a bit of an acquired taste with the series 1 pre is the three position mid switch rather than a sweepable mid. I tend to leave it in the mid boost position and use the pickup blend to adjust how it sits in the mix. Quote Link to comment Share on other sites More sharing options...
Myke Posted August 3, 2013 Share Posted August 3, 2013 No they don't. It hisses a little when the treble is boosted but that is all apart from the hum I mentioned before. Quote Link to comment Share on other sites More sharing options...
Myke Posted August 3, 2013 Share Posted August 3, 2013 [quote name='ikay' timestamp='1375547312' post='2162794'] The pre on my series 1 is fine, maybe just a tiny bit of hiss when treble is fully boosted, otherwise quiet. Pickups definitely don't hum when solo'd. Only thing which is a bit of an acquired taste with the series 1 pre is the three position mid switch rather than a sweepable mid. I tend to leave it in the mid boost position and use the pickup blend to adjust how it sits in the mix. [/quote] I love the tone of mine when it's more bridge pickup with a slight bass boost Completely OT though Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted August 4, 2013 Author Share Posted August 4, 2013 Right. My pups hum a bit when solo'd. I'm assuming this is because they are not attached to the original pre. It's a Delano that's in it at he mo. I don't have issues with the tonality of it - it's fine, it's just the humming of the pups that's annoying me. I *was* sitting just in front of the amp, tho' - rehearsal room. G. Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted November 27, 2013 Author Share Posted November 27, 2013 OK, I have the original pre & I wired it in, switched it on and ........ nothing. Has anyone got a pic showing where everything is connected? Particularly what /how is connected to the black wire coming off the board just to the right of the volume pot? G. Quote Link to comment Share on other sites More sharing options...
ikay Posted December 1, 2013 Share Posted December 1, 2013 [quote name='geoffbyrne' timestamp='1385572341' post='2289815'] Has anyone got a pic showing where everything is connected? [/quote] Hi Geoff, some annotated pics of my TRB series-1 preamp below. Hope that's of some help. If anything needs clarifying drop me a pm. [URL=http://s1090.photobucket.com/user/iankay/media/TRB%20PREAMP/IMG_1380.jpg.html][IMG]http://i1090.photobucket.com/albums/i370/iankay/TRB%20PREAMP/IMG_1380.jpg[/IMG][/URL] [URL=http://s1090.photobucket.com/user/iankay/media/TRB%20PREAMP/IMG_1388.jpg.html][IMG]http://i1090.photobucket.com/albums/i370/iankay/TRB%20PREAMP/IMG_1388.jpg[/IMG][/URL] [URL=http://s1090.photobucket.com/user/iankay/media/TRB%20PREAMP/IMG_1381.jpg.html][IMG]http://i1090.photobucket.com/albums/i370/iankay/TRB%20PREAMP/IMG_1381.jpg[/IMG][/URL] Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted December 2, 2013 Author Share Posted December 2, 2013 Absolutely ace, Ian - many thanks. G. Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted December 5, 2013 Author Share Posted December 5, 2013 OK, I've made a mockup - black from board & earth leads fro pickups to ground. It worked with the Red to Tip and White to Ring. My cavity(!) isn't shielded, so I have to take all earths to the socket pin. Again, many thanks for the help. It looks like I'll get the Old Dear back to original spec, then I may put it up for sale. G. Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted December 6, 2013 Author Share Posted December 6, 2013 Success!!!!! G. Quote Link to comment Share on other sites More sharing options...
ikay Posted December 6, 2013 Share Posted December 6, 2013 Excellent! Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted December 6, 2013 Author Share Posted December 6, 2013 Many thanks to you, Ian for the photos, and to Ou7shined for fixing the ribbon cable. Without both of you this wouldn't be working again. Geoff. Quote Link to comment Share on other sites More sharing options...
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