leigh
Well-known member
I'm stumped! I've done a fair amount of troubleshooting on my S65 in the past, but this is a weird one...
The setup: A Trident Series 65 (32x8) that all channels but one are working fine on.
On the problem channel: it's not passing signal to the Right remix buss, or to any of the even-numbered groups (groups 2, 4, 6, 8).
So that pretty much rules out a pin connection issue, since it would have to coincidentally be an issue with "every other" pin in the bottom strip of pins. I cleaned the pins anyways, but it didn't fix this.
My next thought was naturally the panpot. Checking the schematic (attached, see bottom right area), we see that is where the mono signal through the channel gets split into Left and Right sides. From there the signal passes through the solo switch, then to the group assign switches, then to the summing resistors, and then out the card. Nothing else going on there!
I cleaned the panpot and the switches. No go.
With an ohm meter, I then checked the resistances from the "top" of the panpot to each pin output. They are nearly identical. So it seems I have a continuous path for the signal out each side (L & R). If so, then where is the signal being lost??
One other bit of info I forgot to mention: as I turn the panpot to the right, at about the 3 o'clock point the signal through the Left output starts sounding like a square wave. My test tone is sine wave. (So that would suggest that some stage is getting fuzzed out?) When the panpot is all the way to the right, I can still hear the fuzzed out tone, but since I'm only hearing the left side of things, it is very faint (probably just leakage).
Leigh
The setup: A Trident Series 65 (32x8) that all channels but one are working fine on.
On the problem channel: it's not passing signal to the Right remix buss, or to any of the even-numbered groups (groups 2, 4, 6, 8).
So that pretty much rules out a pin connection issue, since it would have to coincidentally be an issue with "every other" pin in the bottom strip of pins. I cleaned the pins anyways, but it didn't fix this.
My next thought was naturally the panpot. Checking the schematic (attached, see bottom right area), we see that is where the mono signal through the channel gets split into Left and Right sides. From there the signal passes through the solo switch, then to the group assign switches, then to the summing resistors, and then out the card. Nothing else going on there!
I cleaned the panpot and the switches. No go.
With an ohm meter, I then checked the resistances from the "top" of the panpot to each pin output. They are nearly identical. So it seems I have a continuous path for the signal out each side (L & R). If so, then where is the signal being lost??
One other bit of info I forgot to mention: as I turn the panpot to the right, at about the 3 o'clock point the signal through the Left output starts sounding like a square wave. My test tone is sine wave. (So that would suggest that some stage is getting fuzzed out?) When the panpot is all the way to the right, I can still hear the fuzzed out tone, but since I'm only hearing the left side of things, it is very faint (probably just leakage).
Leigh