Firstly, hello. Secondly, I will apologise if I cover old ground. I have recently acquired a TX81Z, and have discovered it is v1.1. Unfortunately my research...
1205
Alan Probandt
alan_probandt
Jun 5, 2012 12:53 am
TX81-Z ROM version had a different checksum calculation when writing a voice data bank than the checksum calculation used when reading a voice data bank. ...
1206
Alan Probandt
alan_probandt
Jun 5, 2012 1:05 am
You can replace IC3 with a standard 7805 three-terminal voltage regulator. Add a small heat sink because it is sinking about 600-700 milliamps and will get...
1207
Ullrich Peter
ullrich_67
Jun 5, 2012 6:35 am
Hi! The last OS version V1.6 is in the Files section: http://launch.groups.yahoo.com/group/yamahablackboxes/files/Tx81z/ as Loscha postet it here a few years...
1208
narfman96
Jun 5, 2012 12:48 pm
I can send a V1.6 eprom to whoever needs one. Since Yamaha owns the rights to this firmware I only charge for the eprom and the shipping. Email me directly for...
1209
chrislenoram
Jun 5, 2012 1:47 pm
Thank you all for quick response. I have sent some of you an email in relation to this....
1210
Max
crazymartin78
Jun 5, 2012 9:42 pm
i replaced voltage regulators to ST L7805CV and unit works but i still see some ripple at about level -72db maybe its normal because this unit is not super...
1211
Alan Probandt
alan_probandt
Jun 5, 2012 11:42 pm
Congratulations on a successful synth repair!  A -72dB signal is very low. Is that on the output audio of the synth? How many milli-Volts is that?  ...
1212
idledpolkapeel
Jun 6, 2012 8:22 am
math is everyones best friend when modulating fm synthesis. while real time controls may not sound smooth at times, time programmed sequential steps generally...
1213
Hernan Gonzalez
cooptrol
Jun 6, 2012 1:41 pm
Hi everyone, I'm jumping into this thread to share my experience. I have a TX81z, a TX802, and now a Korg DS8. I have been testing a Behringer BCR2000...
1214
Royce
rpcfender
Jun 6, 2012 2:52 pm
Hi Hernan you probably already know, but the data stream from the BC can be thinned dramatically but programming it to wait a number of milliseconds after the...
1215
Hernan Gonzalez
cooptrol
Jun 6, 2012 3:08 pm
Oh, I didn't know that! Anyway, tweaking FM in real time as a performance is a bit unpredictable and can jump to harsh. Unless you make noise music, I still...
1216
presence_of_intent
presence_of_...
Jun 20, 2012 7:41 am
So, I have TX81z that seems to function normally but there is no audio from the line outs or headphone out. I do hear a audible click on power up and another...
1217
idledpolkapeel
Jun 20, 2012 7:44 am
just to be sure, the volume is up all the way correct?...
1218
presence_of_intent
presence_of_...
Jun 20, 2012 7:55 am
Yes, it is....
1219
jammie
jammie.emma
Jun 20, 2012 9:39 am
lookin the files section for the schematics cant remember with out looking but on most of yamaha gear there is a transistor switching circuit for thud...
1220
presence_of_intent
presence_of_...
Jun 20, 2012 3:36 pm
Hey, thanks very much, jammie. I will check this out and report back....
1221
Jesse Hager
jesse.hager
Jun 20, 2012 5:55 pm
The TX81Z doesn't use a coil. The transistors (Tr1, Tr2) short the audio outputs directly to ground when the protection circuit (around Tr3,Tr4,Tr5) is active....
1222
presence_of_intent
presence_of_...
Jun 20, 2012 7:16 pm
Thanks, Jesse. you helped confirm I was looking in the right place for the protection circuit jammie was talking about. Considering the external condition of...
1223
jammie
jammie.emma
Jun 20, 2012 7:30 pm
like i said with out looking at the schems i was only pointing to what yam did on most of its synths so listen to jesse as he has nailed it on the head i just...
1224
Tom Green
tgreen2905
Jun 20, 2012 8:37 pm
Also check the electrolytic capacitors visually - look for any leaking or bulging, especially of the tops. Watch <http://www.youtube.com/watch?v=wpl8AHUgcUU>...
1225
Jesse Hager
jesse.hager
Jun 21, 2012 6:51 pm
I took a look at your picture. Is that a worn spot on the transformer (middle of green band)? It looks like exposed metal. It might be shorting against the...
1226
parduz
Jul 7, 2012 12:32 pm
Hello to all from Italy (pls forgive my bad english). I own a now dead FB01 which, chained with a guitar digital multieffect, was used mainly as a "distorted...
1227
jammie
jammie.emma
Jul 7, 2012 1:02 pm
disco dsp phantom reads 4op sysex data i have been trying the converted .opm files on it along with my tx81z and its preaty close it also has a filter so that...
1228
charlie 'chop'...
charleschop
Jul 7, 2012 6:38 pm
hey pal padkuz, i know a great person in the yamaha dx7 group which has made a program for the pc to convert sys ex patches..although it does no litteral...
1229
Tom Green
tgreen2905
Jul 7, 2012 9:50 pm
The "FM Synthesis Tutorial" can be found here, using the Internet Archive site: <http://web.archive.org/web/20090501061956/http://www.anthropomorphic.us/fm/ ...
1230
parduz
Jul 7, 2012 10:53 pm
Thanks to all. I'm sorry to have not been clear: Tom: i (more or less) know how FM synthesis works, Charlie: i have access to that values, Jammie: i'd like to...
1231
Daniel Forró
danforcz
Jul 8, 2012 12:00 am
... Owner's Manual didn't explain this? ... I'm not sure if somebody did such measuring for FB01. I have such table for DX7 (found somewhere on the net),...
1232
jammie
jammie.emma
Jul 8, 2012 9:16 am
vopm is the only free that read fm opm files you can convert fbo1 and all other 4op synths to this format with the new dxconvert but be warned vopm is very...
1233
charlie 'chop'...
charleschop
Jul 8, 2012 7:00 pm
so it appears your vst has no lfo the same as the fb01? charlie...
