This amp isn’t producing any positive regulated voltage.
I removed the opamps since 1 of them was defective and still couldn’t get the +15 volts .
All opamps for this amp still have voltage on all pads even after they have been removed from the board .
I removed the regulator also and all 3 pads for the regulated have voltage on them .
Any ideas ?
I removed the opamps since 1 of them was defective and still couldn’t get the +15 volts .
All opamps for this amp still have voltage on all pads even after they have been removed from the board .
I removed the regulator also and all 3 pads for the regulated have voltage on them .
Any ideas ?
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If I plug in the signal source I get the 15 volts on the opamps .
Wondering in these amps are the regulators supposed to get to hot to touch ?
And I guess I have to use the non bridging speaker terminals in This amp to get the correct readings and not use main ground when testing the regulated voltages
Wondering in these amps are the regulators supposed to get to hot to touch ?
And I guess I have to use the non bridging speaker terminals in This amp to get the correct readings and not use main ground when testing the regulated voltages
It's normal for regulators to get hot.
Some amps have an isolated secondary which prevents measuring voltage using the primary ground.
From the information that you've provided, I don't know why the +15v would be the only missing voltage when measuring the voltage using the primary ground.
Some amps have an isolated secondary which prevents measuring voltage using the primary ground.
From the information that you've provided, I don't know why the +15v would be the only missing voltage when measuring the voltage using the primary ground.
Back to this amp once again .
I replaced the positive regulator and an opamp .
Now this amp lokes to burn up the transistor and resistor connected to pin 8,11,12 of the 494 It’s burnt up twice now
Any ideas why this keeps happening
I replaced the positive regulator and an opamp .
Now this amp lokes to burn up the transistor and resistor connected to pin 8,11,12 of the 494 It’s burnt up twice now
Any ideas why this keeps happening
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Ok got a question .
The power light on this amp consists of 5 light bulbs the originals looked like incandescent light bulbs . They were all burnt out .
I swapped them over to leds and now get the transistor that controls the 13 volts to pin 8,11,12 of the 494 to burn and blow apart .
Could switching the incandescent bulbs over to leds cause this issue ?
The power light on this amp consists of 5 light bulbs the originals looked like incandescent light bulbs . They were all burnt out .
I swapped them over to leds and now get the transistor that controls the 13 volts to pin 8,11,12 of the 494 to burn and blow apart .
Could switching the incandescent bulbs over to leds cause this issue ?
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