Never seen this one...will call Wheatstone Friday, but meanwhile has anyone ever seen an Auditronics 2500 console where the left input to a module goes to BOTH the Left & Right outputs and the right input is ignored? Looking at the schematic, I see little opportunity for effectively a 'mono' mode to occur. Anyone ever seen this?
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Auditronics 2500 Strange Issue
- Thread starter BobOnTheJob
- Start date
lightning? On the A series this was a shorted 5532
Which 5532 on which module?
Is it just one input module doing this or all of them? Does it do it on PGM and AUD?
The MI module acts likes that. What goes in on the left comes out on both.
It does it on at least two of the SLI modules...waiting for word on whether it does it on AUD as well as PGM. Looking at the LO1 module schematic, there seems to be no opportunity for that mode to exist as the PGM L and PGM R each have their own set of chips.ncradioeng said:
There is a switching chip--don't have the book at home--but you can figure it out from the schematic.
This chip determines what goes to program/audition/mono 1 or 2. When it blows weird things happen. Static pulses, messing with the power supply busses or inserting/removing a module while hot will blow the chip.
Unfortunately it's programmed somehow, so I don't think you can get the chip from the usual sources. Leightner would be the best bet.
This chip determines what goes to program/audition/mono 1 or 2. When it blows weird things happen. Static pulses, messing with the power supply busses or inserting/removing a module while hot will blow the chip.
Unfortunately it's programmed somehow, so I don't think you can get the chip from the usual sources. Leightner would be the best bet.
Had a chance to narrow it down a bit more....It's happening on at least 2 faders and both are producing a stereo feed in AUD but the aforementioned Left IN = Left and Right Out in PGM. Still sound like the switching chip Tom? Wheatstone did take my call & seemed very willing to help...guy's name was Jerry.
I don't see anything in the LO module that would cause that. Something might be happening with the 4053's at the SI module output. The only other place L and R might cross is at the Insert/send connections, but that would affect both AUD and PGM. Did someone spill a Dr Pepper on it?
U11--on a stereo module--is a PIC16C55--under the little board with the Pgm/Aud/M1/M2 switches--interacts somehow with the HI 509 chips that switch A or B inputs into the module (also under the little plug-in circuit board)--as well as a lot of other circuits on the module. I remember some strange happenings with cue when this would blow, but beyond that don't remember the symptoms.
As I mentioned, taking the modules in or out with the power on usually did in the chip. As well as the usual nearby lightning strikes (although that would normally blow the output op amps until we isolated the consoles with 111c's)
U11 for a mono module is programmed differently (or is a different chip? paper label covers the top of the chips).
I have a schematic if you need it--let me know & I'll scan and send you a PDF.
As I mentioned, taking the modules in or out with the power on usually did in the chip. As well as the usual nearby lightning strikes (although that would normally blow the output op amps until we isolated the consoles with 111c's)
U11 for a mono module is programmed differently (or is a different chip? paper label covers the top of the chips).
I have a schematic if you need it--let me know & I'll scan and send you a PDF.
The PIC chip controls the A/B switching, channel on/off, timer start/stop, external start/stop and monitor mute but nowhere do I see it able to route L and R audio. The 4053's at the module output which are controlled by the PGM, AUD, MONO 1 and 2 buttons may cause a mix of some sort if they fail to ground signals not selected.
Scott...I sent a support request via the website a couple of days ago that mentioned that Jerry had an open ticket on the topic. If you could nudge that along (no response yet), I'd appreciate it.ScottJ said:
Was this issue resolved? If so, I'm curious as to what caused it.
It suddenly 'fixed itself'. If this problem comes back, I'll start this thread again.ncradioeng said:
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