dear all
i have a problem in my clone QUAD606,the OUtput is about +25V when supply voltage is +-40V,from the schematic i think the point A is about 0V,
is anyone know how did the QUAD606 working(from the schematic) for output near 0V.and who can help me to slove the clone problem.thanks a lot.
i use the transformer like below
i have a problem in my clone QUAD606,the OUtput is about +25V when supply voltage is +-40V,from the schematic i think the point A is about 0V,
is anyone know how did the QUAD606 working(from the schematic) for output near 0V.and who can help me to slove the clone problem.thanks a lot.
i use the transformer like below
Attachments
the whole picture
The daiagram appears to be missing a vital part --- The PSU --- did you also correctly "clone" the PSU especially the active ground offset balance T15 and T16 ???
Blue (in from the windy city)
The daiagram appears to be missing a vital part --- The PSU --- did you also correctly "clone" the PSU especially the active ground offset balance T15 and T16 ???
Blue (in from the windy city)
i did the correctly wring and use active ground powersupply,output is still in high DC leveL,I want to confirm is anyone who has the experience in QUAD equipment,How is the QUAD606 output can located in 0V.
SHARMAN said:
Which is the point that is at 25V? I see only two 0V points in your schematic.
Jan Diddden
SHARMAN said:
OK, I assume that the other '0V' point in the drawing is also at +25V?
The best way to trouble shoot this is working backwards from point A (leftwards) and measure the terminal voltages of the transistors as shown in the schematic. And don't assume that your wiring is correct. It is very difficult to spot wiring problems if you did it yourself. Unless a component is broken, it is a wiring error. There are no more flavors...
Keep us posted.
Jan Didden
a +25 volts at the output means there is a transistor(maybe reverse connected) that returns to the negative rail, you can check in that direction.
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