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Jl Audio 500/1v2 No audio.
Jl Audio 500/1v2 No audio.
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Old 14th November 2018, 08:33 PM   #31
rhempz01 is offline rhempz01  United States
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Join Date: Nov 2016
Location: Milford Delaware
I had to make some final adjustments, a fee cuts. But j ordered extra prices in case I break them. They do work. I wanted a clear picture for the forum.
393:
1.) 4.99vdc
2.) .002vdc
3.) .094vdc
4.) .000vdc
5.) .092vdc
6.) .196vdc
7.) .044vdc
8.) 11.44vdc
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Old 15th November 2018, 06:59 AM   #32
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
Pull the orange 33uf cap near that IC to see if it's leaking.
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Old 15th November 2018, 09:24 PM   #33
rhempz01 is offline rhempz01  United States
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Join Date: Nov 2016
Location: Milford Delaware
It tests ok. I ordered a few 4r7 and the 33uf 16v caps. I didn't have any. The 4r7 in front of the driver card looked a little burnt, so I replaced it with a 5r1 I had from a Rockford. Same result. D611-d612 are reverse polarity diodes? When powered up a sizzling sound emmits from power supply transformer, or those diodes.
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Old 15th November 2018, 09:37 PM   #34
Perry Babin is offline Perry Babin  United States
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Location: Louisiana
D611 and D612 are for current sensing.

Did you power it up with the 33uf out?
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Old 15th November 2018, 10:27 PM   #35
rhempz01 is offline rhempz01  United States
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Location: Milford Delaware
Same result if the 33uf capacitor is out of curcuit.
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Old 15th November 2018, 10:58 PM   #36
Perry Babin is offline Perry Babin  United States
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If you jump pin 5 to pin 8 will the low-voltage supply power up?
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Old 15th November 2018, 11:34 PM   #37
rhempz01 is offline rhempz01  United States
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Join Date: Nov 2016
Location: Milford Delaware
No.
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Old 15th November 2018, 11:54 PM   #38
rhempz01 is offline rhempz01  United States
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Join Date: Nov 2016
Location: Milford Delaware
The sound is from the power supply mosfets. The drive signal looks bad. Is that because of the low voltage supply is not functioning?
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Old 17th November 2018, 10:43 PM   #39
rhempz01 is offline rhempz01  United States
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I went through the driver board and can't find any shorted components. And jumping the pin with or without the capacitor didn't power the low voltage supply up.
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Old 17th November 2018, 11:26 PM   #40
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
To offer any suggestions on the drive, I'd need to see waveforms.

Did the voltage on pin 1 drop to 0v when you jumped 5-8?
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