<p>This is what the <a href="http://www.yamahamusicindia.com/index.aspx" rel="nofollow">Yamaha Music India Pvt. Ltd.</a> references for <a href="http://www.yamahamusicindia.com/service_centres/index.aspx" rel="nofollow">AV & Hi-Fi Service Centers</a> give, </p>
<blockquote>
<p><strong>NAMAN ELECTRONICS</strong><br>
418, GANESH PETH,<br>
NEAR GURUDWAR,<br>
PUNE - 411002, MAHARASHTRA<br>
+91-20-2605 1200</p>
<p><strong>NATIONAL ELECTRONICS</strong><br>
SHOP 6, NATIONAL HEIGHTS,<br>
418, GANESH PETH,<br>
NEAR GANESH PETH GURUDWARA,<br>
PUNE - 411002, MAHARASHTRA<br>
+91-20-2605 1300,<br>
+91-20-2605 1400 (I think this is a Fax number)</p>
</blockquote>
<p>PS: If other numbers do not work, you can try talking with Mr Deepak directly at +(91)-(20)-66821099.</p>
<hr>
<p>Here is <a href="http://www.servicecenterpune.in/contact-us.html" rel="nofollow">a map reference for the National Electronics</a> place.<br>
I could not reach their number at the moment; maybe they're closed Tuesdays.<br>
Am also trying to get a Yamaha Synth repaired...<br>
(thanks for reminding me to look this up :-)</p>
<hr>
<p>We may be too late for the day if <a href="http://pune.justdial.com/national-electronics_ganesh-peth_Pune_kyorveWPhsq.htm" rel="nofollow">this JustDial reference</a> is to be believed,</p>
<pre>
Monday : 09:30 am - 06:30 pm
Tuesday : 09:30 am - 06:30 pm
Wednesday : 09:30 am - 06:30 pm
Thursday : 09:30 am - 06:30 pm
Friday : 09:30 am - 06:30 pm
Saturday : 09:30 am - 06:30 pm
Sunday : Closed - Closed
</pre>
<p>PS: Mr Deepak confirms that they are open till 7pm on working days.</p>
<hr>
<p>Ok! from that JustDial page I got another number for a '<code>Mr Deepak</code>',<br>
This is <code>+(91)-(20)-66821099</code>.<br>
Got to talk with Mr Deepak himself, who says he will call back shortly.<br>
There may be hope here...</p>
<hr>
<p><strong>Update</strong>: I was able to talk with Mr Deepak just now.<br>
He confirms they are an authorized Yamaha service center and they can fix music systems as well as keyboards. This should be useful for both of us to start with. </p>