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.
www.myspace.com/testaestudioCel: 4771351724 > Subject: NEOTEK: IKE NEOTEK Series 3 power supply issues/ troubleshooting > From: [email protected] > Date: Mon, 18 Jan 2010 11:07:02 -0700 > CC: [email protected] > To: [email protected] > > Ike- > > Thanks for your insight > > This console was made it 78' and we are not sure if it is a series III or a > series II as there seems to be no rectifying diodes outside of the power > supplies as the power comes in from the cables and is fed directly to the > master module while the other supply feeds the bus modules. > > We have disconnected that master module from the power and disconnected the > ribbon that feeds the input modules power and logic and am still not getting > the correct voltage out of the supplies when it is hooked up to the console. > > I've tried to use one supply to hook up one side of the console and this > problem still remains. Given that both the power to the master module and > input modules are disconnected would be anything in the bus modules that > could be shorting me out? > > Once, again, thanks for your time and appreciate the help > > -Clark > > > > > > > > > On Jan 18, 2010, at 5:38 AM, Ike wrote: > > > Two PS's are probably summed through diodes (usually 3 pins of a bridge > > rectifier). Check these for shorts, they should be on the panel where the > > supplies connect to the desk. You may be shorting the two supplies' outputs > > together. Another thing to try is to see if the board will run on one > > supply with fewer channels powered, like 24+ the master section. This would > > also point to a problem with the PS input panel. > > Ike > > > > Sent from my iPhone > > > > On 2010-01-17, at 2:36 PM, [email protected] wrote: > > > >> 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. > >> > > ------ > > > > 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. > > ------ > > 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
