Is Series IIIc or IIIF? probably is one resistor located between the TL081 and the transformer. Have you changed the TL's????, maybe are inverted. Or maybe one DIP's of the chain between the channels are in shortcut. Connect the PS WITHOUT the master section, probably the shortcut is in the master section, if not, check all the IC's, Cap and transistor or maybe one bad welding on the master section. The 14106 IC in the master section MUST have two of the legs wired togueter, maybe are this IC tha's are UNwired. The extrange is that the PS sends 0-7 volts...when this happend maybe is one bad transistor, maybe the MPSA05 or the 5638/NTE467, i hope help my advice. Best regards from mexico.
Please visit: www.myspace.com/testaestudioCel: 4771351724 > To: [email protected] > Subject: NEOTEK: NEOTEK Series 3 power supply issues/ troubleshooting > Date: Sun, 17 Jan 2010 14:36:43 -0500 > From: [email protected] > > I have a series 3 console that was custom built for Lonnie Mack, circa > 1978, 36 channels 24 bus. There are 2 power supplies, 1 supply lost the > -18 due to one of the legs of the TIP145 transistor breaking. It made > the other transistor in the other supply get burnt. We have repaired > both supplies but when we put power to the console, there seems to be a > short as the +/- 18 volts are down to 7 & 0 volts. Something has > definitely shorted out or something. I have disconnected the power from > the master module, and the channels that were fed off of the ribbon > cable and re tried the power, now I had +/- 7 volts. When the supplies > are not hooked up they read the correct voltage. > > > Looking for some help and where to start looking for the problems > Thanks ahead in advance, > Clark > > > ------ > > View the list online at: http://www.mail-archive.com/[email protected] > > You can unsubscribe at anytime by sending an email to > mailto:[email protected] with "unsubscribe neotek" in the message body. > If you have any difficulties, or questions --please send an email to > mailto:[email protected]. > > The Neotek list is lovingly hosted by Catapult Web. Remember that any message > or reply sent to the list will be automatically forwarded to all subscribers. > > Vive Le Neotek! > > Thanks. _________________________________________________________________ Nuevo Windows 7 http://www.windows.com.mx
