JX500/1D Protect mode

joselorenzo

Member
2006-09-21 7:05 am
Hi
I am looking for help with repair of Jx500.1d of jl audio.
The first problem that was detected is contact with water and two pieces of capacitor 63v 3300uf exploited. One of the capacitors was in total short circuit.
Replace the two 63v 3300uf capacitors.
Now just turn on the LED that indicates protection.

These are some measurements that I made
TL494 IC2
IC2
1-0.998
2- 3.56
3- 4.69
4- 4.01
5- 1.438
6- 3.54
7- 0.01
8- 4.94
9- 0.01
10- 0.01
11- 4.94
12- 13.54
13- 4.94
14- 4.94
15- 4.94
16- 7.19

IC3 MP18021
IC2
1- 13.63
2- 13.63
3- 0.01
4- 0.01
5- 0.01
6- 0.01
7- 0.01
8- 0.05

IC 1 LM358
IC2
1- 0.01
2- 3.38
3- 2.460
4- 0.01
5- 2.797
6- 0.332
7- 7.84
8- 9.01