Ike- So we disconnected the power to the cue send modules, the echo send modules, the 2 mix module, 2 mix to cue module, and the oscillator module. With those modules disconnected we got the voltage on the power supply back to +/-18v with the master module connected.
Right now looking for input as to what would driving the voltage down in those disconnected modules? Thanks again for all the help -Nick On Mon, Jan 18, 2010 at 11:07 AM, NS <[email protected]> wrote: > 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. >
