It starts at 0 and goes up to 15 volts within a sec it works normally .
I lifted Q11 and same issue the amp draws excessive current when trying to power it up
I lifted Q11 and same issue the amp draws excessive current when trying to power it up
Measure the DC voltage across the source resistors when it's drawing current. Do all read 0.000v DC?
I will have to let it sit for a lil bit since it won’t draw excessive current until I drain the filter caps and let it sit for a few mins
When the amp starts drawing excessive current in power up I don’t get good drive signal to all of the fets
If you connect only remote and ground and push on various points on the board, does the drive signal ever change?
How is the signal bad when it draws excessive current?
When it draws excessive current, does one group of FETs heat more than the other?
How is the signal bad when it draws excessive current?
When it draws excessive current, does one group of FETs heat more than the other?
If I connect only remote and ground and push on various spots of the board nothing changes and I get good drive signals .
When it draws excessive current the top of the waveform disappears and it looks like a lot of vertical lines on the scope .
All fets heat equally when it draws excessive current
When it draws excessive current the top of the waveform disappears and it looks like a lot of vertical lines on the scope .
All fets heat equally when it draws excessive current
When I connect only ground and remote to the amp and push on various spots of the board nothing changes and I get good drive signal .
Both banks of fets heat equally
The first pic is when the amp powers up normally
The 2nd pic is when the amp draws excessive current.
Scope set to 10us 5volts/div
Both banks of fets heat equally
The first pic is when the amp powers up normally
The 2nd pic is when the amp draws excessive current.
Scope set to 10us 5volts/div
Attachments
The timing capacitor is marked 822 which is a 0.0082
It measures 8.88NF
Should I replace it ?
The timing resistor still measures good
It measures 8.88NF
Should I replace it ?
The timing resistor still measures good
The timing components can become intermittent.
Also check the DC voltage on pin 13 when the amp draws excessive current.
Also check the DC voltage on pin 13 when the amp draws excessive current.