Hi folks before make this post already check every single one on forum history related to JL 500/1 and sadly didn't find anything. so im here asking once more for your help. working atm on one JL500/1 No power at all. complete dead. just finish to overview the main PCB and can't find anything desoldered or burned, without a schematic diagram is kinda hard figure out where could be the problem, all mosfets are fine, SG3525 pwm ic refuses to oscillate, ( al ready replace it ) this amplifier have some kind of programmable PIC inside but i don't know how the system works. thanks in advance any help of any kind will be appreciated. 🙁
Using the pin numbering scheme shown in the attached image, post the DC voltage on all pins with B+, remote and ground connected.
http://www.bcae1.com/temp/jlaudio500slashone10pinconnector01.jpg
http://www.bcae1.com/temp/jlaudio500slashone10pinconnector01.jpg
pin
1= 0.000 6=13.303 all measurements at 13.310 VDC
2=0.000 7=0.000
3=0.001 8=0.037
4=5.671 9=0.175
5=0.121 10=0.000
thanks perry.
1= 0.000 6=13.303 all measurements at 13.310 VDC
2=0.000 7=0.000
3=0.001 8=0.037
4=5.671 9=0.175
5=0.121 10=0.000
thanks perry.
yup signal sensing is in "off" position . may i bypass that ? which pin should be energized to power on ? only to test purposes
Confirm that you have remote voltage on two pins of that switch and one pin is connected to pin 3 of the 10 pin connector.
oh ! thanks Perry i think have found the issue, leaked capacitor on top board have corroded some tracks under it, will repair it and soon will report . thanks a lot again !!
Any vias that have a green core are likely damaged and should be repaired. If they haven't failed yet, they're likely to fail soon. If you examine the copper trace around them with a high powered magnifying glass, you can usually see where the copper is damaged.
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