Hello I have a JL AUDIO HD 750 that I'm trying to repair Maybe you could assist? Do you have a schematic you could send me ? The green light was flashing. I found 2 bad rectifiers and replaced them. The light was solid green and I got audio for a short time. There was some popping distortion...
It intermittently plays audio with a solid green light then switches to no audio with a flashing green light.
The caps and resistors and fets are testing good
It intermittently plays audio with a solid green light then switches to no audio with a flashing green light.
The caps and resistors and fets are testing good
Do you have a scope?
Which two rectifiers failed?
Does it still play audio, intermittently, when initially powered up?
Which two rectifiers failed?
Does it still play audio, intermittently, when initially powered up?
Yes they are .
I dont know what the markings mean. I just had them matched up for the replacements and then it allowed a solid green light with audio after that
I dont know what the markings mean. I just had them matched up for the replacements and then it allowed a solid green light with audio after that
I don't have that negative rectifier as a rectifier.
Do the outer terminals of those two components read 0 ohms between them?
Is there a circuit board designation for the negative rectifier?
Do the outer terminals of those two components read 0 ohms between them?
Is there a circuit board designation for the negative rectifier?
Your revision is different from what I have notes on. What are the audio output ICs in your amp?
This is the best way to handle the repair.
Try getting a diagram for your exact amp from JL.
Did you check the connection between the two rectifiers?
Try getting a diagram for your exact amp from JL.
Did you check the connection between the two rectifiers?
JL won't provide a schematic. They told me it's proprietary.
You want me to test the new ones in circuit ?
Or the old ones ?
You want me to test the new ones in circuit ?
Or the old ones ?
I want you to measure the resistance between the outer legs between the two rectifiers. What's the resistance between the outer legs from one rectifier to the other?
Someone told me differently, about diagrams from JL today. I guess he was just lucky.
Someone told me differently, about diagrams from JL today. I guess he was just lucky.