Thanks folks, Turns out the client had the Studio Monitor Module schematic that I didn't have in my copies. Console had a bad transistor in the logic section. Fixed and was out of there before that day's session!
Does anyone have layout drawings for the series 2? I feel like I waste a lot of time tracing stuff to find whatever transistor I'm looking for. Again, many thanks Greg and Ike for pointing me in the right direction -jerry On Oct 14, 2010, at 16:31, Ike Zimbel <[email protected]> wrote: > > Or a remote talkback button, or the unused WIRING for a remote TB button. I > sometimes find unused wires hanging in various places, especially if the > console was bought used from another facility. > Good luck, > Ike > > On 10-10-14 3:56 PM, Greg Norman wrote: >> The Talkback circuitry is on the Studio Monitor Module (has it's own >> schematic). The dim signal (low or ground) comes from there over to the >> Control Room Module via jumper >> Greg Norman "∆ B12" Look for a short to ground somewhere, also in the slate >> switching. Dummy check to see if the slate button isn't pressed. >> Electrical Audio Recording >> 773.539.2555 >> www.electrical.com >> >> >> >> On Oct 14, 2010, at 1:51 PM, jerry macdonald wrote: >> >>> Hello list, >>> A client of mine has a Series II that has latched the talkback circuit and >>> won't let go. He had loosened the master section to wiggle the speaker >>> output molex connector (with solid core wire) as he was getting some >>> intermittent crackle in the speakers, apparently did this with the board >>> live but the control room monitor pot turned down, and while sliding the >>> section back into place saw all the meters bounce and light up all the peak >>> lights for a moment. On this Series II, the master section is on the right >>> and isn't on pins, just molex connectors, so I think he thought he'd be >>> safe doing this with the board live. Board is working fine otherwise, >>> supply voltages all read normal. >>> >>> Except, now the talkback light is on and the speakers are dimmed. I had 90 >>> minutes last night to check things: The switch works and the related >>> transistor below it is passing voltage as it should (when switch is brought >>> to ground transistor passes voltage) but I can't figure out where the >>> dimming logic is. I have schematics that don't have any mention of talkback >>> logic, only of talkback mic pre. The other thing I can't resolve is that >>> the two schematics for the master section "Control Room Monitor" and "2-Mix >>> Master Module" are making reference to 5 ICs each on both boards; The >>> actual 2-Mix only has 3 ICs unless I am really missing something here, >>> which is possible as I didn't have enough time to disassemble the two >>> boards from the master section. It seems possible that I have incomplete or >>> incorrect schematics. They are numbered schematics: Control Room drawing >>> number 8111201 drawn by IR and 2-Mix drawing number 8111081also drawn by >>> IR. The board serial number is 8202052 (possibly 8202502 or 82020502) so if >>> the serial number and drawing number are formatted yy/mm/xxxx I would think >>> I'm pretty close. >>> >>> Any ideas? I've got them back up and running by patching the two mix >>> outputs to the power amp and telling them to turn it up and down at the >>> amp. I'll be heading back there on Saturday, and of course, they're busy >>> right now so any down time is bad. >>> >>> Thanks >>> -jerry >>> ------ >>> >>> 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. >> > > -- > Ike Zimbel, > Zimbel Audio Productions Ltd. > Toronto > 416-720-0887 > > "Studio House Calls". Authorized Warranty service for Allen& Heath, > Clear-Com, Drawmer, Soundcraft, SPL and Yamaha. Repairs and upgrades to > analog audio equipment including: AMEK, dbx, Neve, Neotek, MCI, Soundcraft > and more. > www.zimbelaudio.com > > ------ > > 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.
