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Search: Posts Made By: tibimakai
Forum: Troubleshooting Audio Equipment 06-06-2019, 02:36 AM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Unfortunately, is not the DSP issue. This DSP has legs.
Forum: Troubleshooting Audio Equipment 06-05-2019, 06:30 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I have looked under the microscope, and I have found two broken traces. Middle pin(GND) of the Q502, and C503.
Now it's working great.
Thank you all for your help, it is very much appreciated....
Forum: Troubleshooting Audio Equipment 06-05-2019, 02:16 AM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Thanks Andy, I have one but I'm a beginner. I will try that as well.
Forum: Troubleshooting Audio Equipment 06-04-2019, 01:25 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Also, the Q501 I have solder in a few days ago, is brand new.
Forum: Troubleshooting Audio Equipment 06-04-2019, 01:25 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Q502, that I have soldered in, is a brand new one.
Forum: Troubleshooting Audio Equipment 06-04-2019, 10:33 AM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

The fet is a brand new one.
Forum: Troubleshooting Audio Equipment 06-03-2019, 09:49 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

OK, I have soldered in Q502 and it is still not OK.
+2V in stand by and -38V, with signal.
I can't imagine why it is so hard to diagnose this amp. There are just a few components.
+/-5V and 12V,...
Forum: Troubleshooting Audio Equipment 06-02-2019, 09:40 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I will solder in the final IC, and I will measure the speaker output and I will let you know. Most likely tomorrow.
Forum: Troubleshooting Audio Equipment 06-02-2019, 07:06 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

The parts have arrived, and of course I have purchased the wrong package(to big).
I have soldered it in somehow, and now I have +/-5V now. Speaker still shows +2V, without final IC.
I will solder...
Forum: Troubleshooting Audio Equipment 05-26-2019, 09:24 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Forum: Troubleshooting Audio Equipment 05-26-2019, 06:41 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Both R433/R434 are big resistors on the other side, and they have the right value.
Q502 had a short between pins #14/15. I have replaced it.
I have placed an order, for new amp ICs and some 7805V...
Forum: Troubleshooting Audio Equipment 05-22-2019, 10:55 AM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Oh wait, it's most likely a big resistor on the other side. Damn, I was just searching on the bottom. Thanks R_J.
Without Q502, how it will affect the speaker output? You know, when I want to check...
Forum: Troubleshooting Audio Equipment 05-21-2019, 11:01 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I can't find Q433 and R433.
I have removed 7805 and installed a regular big one in there. At the input I had 5V and at the output I had 4.3V. Something is not right, it should be higher the input...
Forum: Troubleshooting Audio Equipment 05-20-2019, 10:38 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I'm about to throw in the towel. I don't even know from where to get the ground from, when I take measurements.
This thing is not worth $40.
Now I have 38V, at the speaker output.
At 7905 I have...
Forum: Troubleshooting Audio Equipment 05-20-2019, 08:03 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Found the 8C and 9C. These turn on only, when there is a signal right?
Forum: Troubleshooting Audio Equipment 05-20-2019, 06:52 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Unfortunately I don't have 10uF/100V capacitors, only lower voltage ones.
Forum: Troubleshooting Audio Equipment 05-20-2019, 10:39 AM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

It was in standby. I just plug it in and measure. I can hear a slight high voltage whistle coming on. Speaker is not connected either.
Forum: Troubleshooting Audio Equipment 05-19-2019, 11:07 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I have removed both C911/C912 and both show 10.2uF 0.42ESR, with the Chinese component tester.
Forum: Troubleshooting Audio Equipment 05-19-2019, 08:38 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

The +/-12V components are visible like R912/D912/L912 same for the other side R911/D911/L911, C921/C922 are on the other side, but I can't see anything else.
Forum: Troubleshooting Audio Equipment 05-19-2019, 08:33 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

D922 was showing .76V same as D921.
Forum: Troubleshooting Audio Equipment 05-19-2019, 08:29 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

R922, D922
See that area how it looks.
I have lifted that big capacitor and removed that black tape, but most likely, those components are under that white silicon.
Forum: Troubleshooting Audio Equipment 05-19-2019, 08:04 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

I have measured the resistance between C922 and L922 and it shows 46.8k. I can't find some of these parts.
I have measured with diode tester across C922 and it shows a correct result.
Forum: Troubleshooting Audio Equipment 05-19-2019, 05:58 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Across C911, there is 12.4V, but across C912, there is 20.7V(!).
Forum: Troubleshooting Audio Equipment 05-18-2019, 09:58 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Across C905 there is 26V.
Across C901 there is 40V and C902 is 46V
Across C921 there is 12V and C922 is only -9.5V. Maybe here is the difference, that can be seen, at the 40/46V.
I can't find...
Forum: Troubleshooting Audio Equipment 05-12-2019, 09:43 PM
Replies: 71
Views: 2,218
Posted By tibimakai
Re: Onkyo SKW-591 subwoofer is dead

Ok, thanks. Tomorrow, I will check these.
Showing results 1 to 25 of 43

 
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