its a 9.1k sorry
with jumper removed i get
Pad1:4.92
Pad 2:1.30
Pad 3:0.80
Pad 4:0.00
Pad 5:4.91
Pad 6:0.42
Pad 7:1.30
Pad 8:12.59
with jumper removed i get
Pad1:4.92
Pad 2:1.30
Pad 3:0.80
Pad 4:0.00
Pad 5:4.91
Pad 6:0.42
Pad 7:1.30
Pad 8:12.59
Have you been applying remote then switching remote off and checking in the 5-10 seconds after remote has been removed?
Ok Im gonna start from scratch with this amp since the main supply isnt working and neither is the small supply...
I only get 1.26 volts on Pins 13 and 15 of the 3525 ..
Do you know what controls the voltage on thoose pins??
I only get 1.26 volts on Pins 13 and 15 of the 3525 ..
Do you know what controls the voltage on thoose pins??
Pins 13 and 15 get power through R421 (2.2 ohm) resistor on the preamp board. They will have power for a few seconds after you remove the remote voltage.
I have 12.57 volts on both sides of the 2.2 ohm resistor
Do you happen to have a high res pic of the area around the 10 pin socket the main board that us where I lose the voltage
Do you happen to have a high res pic of the area around the 10 pin socket the main board that us where I lose the voltage
I assumed that U801 was being driven by the 3525 but that's not entirely correct. There is a connection between them but the 3525 doesn't need to operate for U801 to function. It appears to be a 3-inverter oscillator.
With pin 1 of U800 grounded (you can ground it if it's high), U801 should oscillate. I pulled Q835 out of the amp here to see there would be oscillation with that transistor out of the circuit and there is oscillation but the duty cycle is about 90%. You'll have to adjust the trigger level on the scope to get a locked trace.
If you don't get oscillation with U800 pin 1 grounded and with ~12v on pin 14 of the 74HC02, I'd suggest replacing the 74HC02.
With pin 1 of U800 grounded (you can ground it if it's high), U801 should oscillate. I pulled Q835 out of the amp here to see there would be oscillation with that transistor out of the circuit and there is oscillation but the duty cycle is about 90%. You'll have to adjust the trigger level on the scope to get a locked trace.
If you don't get oscillation with U800 pin 1 grounded and with ~12v on pin 14 of the 74HC02, I'd suggest replacing the 74HC02.
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