Vintage Synth Repair

--- In vintagesynthrepair@yahoogroups.com, "eons" <laser@...> wrote:
>
> Hi,
> 
> I have this Technics for repair it power's up alright.
> All buttons work but no sound comes out from the tones/patches or rhythm section.
> 
> The LCD display also works alright.
> I saw internal battery inside that checked ok.
> 
> A bassy reverberating wave sound is continuously heard coming from the speakers and it wouldn't go away.
> 
> Any suggestions please/ ideas of what to check.
> All supplies seem to be ok although I do not have a schematic/sercive manual.
> 
> Thanks very much in advance.
> 
> Regards,
> eons
>
Bassy sound...Sounds like power supply hum.
Thats where i'd look first. Discolored or swollen parts

If I remeber correctly, the same sound came out of headphone o/p; (bassy reverberating wave sound continuously heard).

But will check this again.

Many thanks for your help.

Any other ideas?

-------------------------------------------

Any sound from headphone output?

To: vintagesynthrepair@yahoogroups.com
From: laser@onvol.net
Date: Tue, 15 Dec 2009 14:17:29 +0100
Subject: [vintagesynthrepair] TECHNICS AX-7 - help needed

Hi,

I have this Technics for repair it power's up alright.

All buttons work but no sound comes out from the tones/patches or rhythm section.

The LCD display also works alright.

I saw internal battery inside that checked ok.

A bassy reverberating wave sound is continuously heard coming from the speakers and it wouldn't go away.

Any suggestions please/ ideas of what to check.

All supplies seem to be ok although I do not have a schematic/sercive manual.

Thanks very much in advance.

Regards,

eons

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