Yes, it does.
The OFF and ON time from the oscillation is not really a 50/50 ratio, more 85/15
The OFF and ON time from the oscillation is not really a 50/50 ratio, more 85/15
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The duty cycle is due to an offset in DC voltage between terminals 6 and 7.
What is the resistor in the service manual (not datasheet) that corresponds to your R43?
Are the output FETs in the circuit?
What is the resistor in the service manual (not datasheet) that corresponds to your R43?
Are the output FETs in the circuit?
Thats a good question...
One side of R43 is GND
Other side of the R43 is connected to C27 and R44 and HEF4069 Pin5.
I could not find this resistor in the FP9001 service manual. But I assume it's a grounding resistor.
FETS are out of the circuit
One side of R43 is GND
Other side of the R43 is connected to C27 and R44 and HEF4069 Pin5.
I could not find this resistor in the FP9001 service manual. But I assume it's a grounding resistor.
FETS are out of the circuit
I would install the FETs. I'm assuming that you've checked all of the diodes and resistors between the 4080 and the outputs.
Pin 1: 11.44v
Pin 2: 5.61v
Pin 3: 6.27v
Pin 4: GND
Pin 5: 6.13v
Pin 6: 6.14v
Pin 7: 5.14v
Pin 8: 11.94 VCC
Pin 2: 5.61v
Pin 3: 6.27v
Pin 4: GND
Pin 5: 6.13v
Pin 6: 6.14v
Pin 7: 5.14v
Pin 8: 11.94 VCC
With R43 removed, there is an oscillation and the fets nicely switch on and off.
50/50 ratio. HIP4080 Pin6 and Pin7 are both 5.28v
50/50 ratio. HIP4080 Pin6 and Pin7 are both 5.28v
Do you have audio?
Without knowing what that resistor corresponds to, I can't offer any suggestions.
Without knowing what that resistor corresponds to, I can't offer any suggestions.
The switching from the fets is very nice and clean.
There is an audio wave on the speaker terminals.
Just hooked up a speaker and it sounds clean.
Maybe that R43 was cutoff in the factory, due tue the fact that there were no burning spots around it. Very strange, but it seems to be in a good working order now. Pulls a little 1.18a at 12v on idle.
I will bench test it saturday for some high loads.
Thank you very much for the help Perry 🙂
There is an audio wave on the speaker terminals.
Just hooked up a speaker and it sounds clean.
Maybe that R43 was cutoff in the factory, due tue the fact that there were no burning spots around it. Very strange, but it seems to be in a good working order now. Pulls a little 1.18a at 12v on idle.
I will bench test it saturday for some high loads.
Thank you very much for the help Perry 🙂
If this amp was in use before you received it, R43 has been in the circuit and the amp was working.
Does having the outputs in the circuit make a difference as far as R43 being in/out of the circuit is concerned?
Does having the outputs in the circuit make a difference as far as R43 being in/out of the circuit is concerned?
I hope I understood your question correctly.
The HIP4080 output oscillation is in good working order when R43 is removed.
The HIP4080 output oscillation is not working when R43 is installed.
I tried the values 10k, 5.1k, 1k, 150ohm, 10ohm for R43.
It seems to be a resistor which reference C27, R44 and HEF4069 Pin5 to GND.
Potential difference between R43 Pin1 (GND) and Pin2 is +-5v (as I can remember)
The HIP4080 output oscillation is in good working order when R43 is removed.
The HIP4080 output oscillation is not working when R43 is installed.
I tried the values 10k, 5.1k, 1k, 150ohm, 10ohm for R43.
It seems to be a resistor which reference C27, R44 and HEF4069 Pin5 to GND.
Potential difference between R43 Pin1 (GND) and Pin2 is +-5v (as I can remember)