sebiiksbcs Posted March 21, 2008 Report Share Posted March 21, 2008 Hi,my MBFM (second approach) is weird.- see topic. If LCD connected, then after power on -> Beeps and white noise at full scale. Mostly noise all the time, plus the notes I play, if I do. The LCD shows all boot stuff regularly ("MIOS 1.9f", and so on), then freezes at the main screen. (if I change patches, no changes on LCD)- Without LCD connected -> No white noise, but I noticed that every six notes I play, three of them are distorted (desoldered too hot OPL3 chip I guess, so maybe three out of six voices got damaged?)hmmmmmmmmmm............. Quote Link to comment Share on other sites More sharing options...
sebiiksbcs Posted March 22, 2008 Author Report Share Posted March 22, 2008 After some testing:the problem has to be between LCD and OPL3 module... All voltages fine, core + LCD work when OPL3 module not connected. As soon as OPL3 interconnection connected, LCD hangs up and "noise data beeps" (reminding me of a very aggressive vintage modem) on the outputs.I will check the YMF262, maybe it became too hot while desoldering... I have a spare one left. Quote Link to comment Share on other sites More sharing options...
TK. Posted March 22, 2008 Report Share Posted March 22, 2008 Maybe there is no contact between the RD# pin of YMF262 and +5V?The voice issue is probably related to a defective YAC512, or to bad solderings around this chip.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
sebiiksbcs Posted March 25, 2008 Author Report Share Posted March 25, 2008 It seemed to be a damaged YMF262. I soldered another one and it seems to work fine now. Still making an OPL3 bulk order to have enought spare chips though :DThanks TK Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.