Hi guys im a bit puzzled with this amp can't get drive signal i checked 15v regulators both - + checked 12v regulators changed lm393 tl072c and lm311 on driver board but still no drive signal what do i check next
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Please don't blindly replace parts.
Do you have signal reaching the driver board?
Hi there no signal reaching driver board
Have you checked for signal there while operating all switches and pots through their entire range?
Where on the driver board do i probe
At the input of the driver board, to start.
Ok Perry il have a look later thank u
At the input of the driver board, to start.
Ok Perry il have a look later thank u
Ok Perry il have a look later thank u
Hi Perry u don't get signal going to driver board what freq do i play in to the rca?
You stated that you have no drive signal. That would mean that the output stage is absolutely dead, no rail-rail oscillation, nothing.
When the output stage is not functioning normally, there is no feedback to the driver board so you will see signal. When the amp is working normally, you will not see any signal into the driver board because it will be cancelled output by the feedback signal.
The input pin is labeled on the attached diagram.
When the output stage is not functioning normally, there is no feedback to the driver board so you will see signal. When the amp is working normally, you will not see any signal into the driver board because it will be cancelled output by the feedback signal.
The input pin is labeled on the attached diagram.
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