Gangous audio on AIWA NSX-F959
I tried with other speakers and it sounds the same, he had changed a zener, the D602 of 4.7 volts and walked impeccably about 15 minutes and failed again, but it seems to me that it worked just by chance, this team has me crazy and hehe
Something strange:
-VL has 22.5 v stand-by
+ VL has 22.3 V in stand-by
when I turn on the equipment, the line
-VL stays at its voltage
But the + VL line drops to 21.4 V
I suspect that there is some defective component in that branch
On the high frequency amplifier card, I have -4 volts on the emitters of the 4 output transistors, and when I turn off they remain at 20 negative volts
NSX-F959 Diagrama.pdf [1.31MB]
Hi, I measured the sub-woofer output and there is no voltage. I measured the high frequency output and I found that I have the equipment in stand-by, 20 negative volts, continuous scale and positive tip in the speaker +, without connecting the speaker, after when I turn on, that voltage goes to 4 negative volts and begins to drop gently until it reaches zero, when I turn off the device has 20 negative volts again.
Hello, just today I could continue with this equipment, I took out the transistors Q221 and Q222, and the audio is now perfect, I will see what transistors I can adapt instead of the SMD.
If my comment was useful, rate me handyman solved, I would appreciate it very much
Hello Enigmahernandez, I had already put you upstairs and I marked you with the solution, see if it was like that or I touched something wrong hehe. Thank you
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