AIWA NSx-SZ35 service manual

break_noon · Guest

Hello,

I need the service manual for AIWA NSX-SZ35 stereo, for personal use.
The problem with it is that is starting and after a while I get a loud 50 Hz noise (sometimes it start after a light buld on/off).
Then it auto shut-down.
If I start it , after a few seconds it shut-down again.
I cannot start it unless I plug-it off for a while (few hours).

If you have it, please sent it at [email protected]

Thank you.

break_noon · Guest

I started measuring capacitors, but with no schematics, it is hard to get around.

Any tips would be apreciated.

Thanks in advance.

Justmanuals · Joined: 21 Aug 2004 Posts: 1948

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[email protected]
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break_noon · Guest

... as I said, I need it for personal use.
I don't even need the whole PDF, just part of it, that could help me to identify the problem.
I don't want to buy this, for one time use.
This is just for hobby.
Even some indications, like, check power source, or final stage would help.

Thanks.

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

I presume 50Hz hum is from both speakers.
Any DC across speaker terminals?

break_noon · Guest

I did not check the DC on speakers terminals. I will try to check it, but I have only a multimeter and a capacimeter. And when there is that noise, the system is shut-down in a few seconds....

When I opened, I saw that the final audio is with 2 STK circuits, one for low frequencies, and one for high.
I did not notice any capacitors for exit, maybe because the circuit is with V+, GND and V-.

My idea is to cut connection from powe on different blocks, and isolate the one that give me this.
I suspect that one block is autooscilating, and consume a lot a current, and the protection system will cut-off power on the system.
I hope is not one of the STK, because the audio is still working, from time to time.

Thanks for sending me those tips.