Hey, what in the hell is U13? I was recapping a capstan motor and in my haste to test it I shorted out Q6 and an electro. (long story) Q6 cracked and went up in smoke and U13-14 literally popped. Q6 is easy to replace but U? what is that? it looks like a transistor or an inverter on the schematic. They both have C124 E.S.V. printed on them.
(bad) Schematic below.
http://www.teaser.fr/~amajorel/tascam238/1a.tif
schematic symbol question
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It sounds be an inverter of some sort.
The triangle with the little circle makes a logic inverter, and the "N" probably means "NOT" gate.
But the line across the triangle means something, and my foggy brain isn't telling me what at the moment.
Since it's got 3 legs, and effectively no V+ connection, It starts to look like an open-collector inverter.
UPDATE:
Since it's a Tascam schematic, I went and flipped through my MS16 schem to see if the part was there...and indeed it was. On the page where they show what's inside the chips, there's a 3-pin device with the name "DTC124N." It's a pre-biased transistor, with an open-collector.
I don't find any DTC124N's in a quick google search, but there are a number of DTC124x variants around...
In he schem itself, is there a section where they say "U3 = XYZ?"
The triangle with the little circle makes a logic inverter, and the "N" probably means "NOT" gate.
But the line across the triangle means something, and my foggy brain isn't telling me what at the moment.
Since it's got 3 legs, and effectively no V+ connection, It starts to look like an open-collector inverter.
UPDATE:
Since it's a Tascam schematic, I went and flipped through my MS16 schem to see if the part was there...and indeed it was. On the page where they show what's inside the chips, there's a 3-pin device with the name "DTC124N." It's a pre-biased transistor, with an open-collector.
I don't find any DTC124N's in a quick google search, but there are a number of DTC124x variants around...
In he schem itself, is there a section where they say "U3 = XYZ?"
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