@All<div>Service manuals are a highly guarded documentation due to industrial espionage and what have you.</div><div>For some manufacturers (nokia) they divide this info into levels eg level 1,2,3,4.</div><div>The higher you go the more trusted the wielder. </div>

<div>But the most secret proprietary info will not be divulged to anyone.</div><div><br></div><div>@Aki. </div><div>Boss bwana. Testing of Bipolar transistors is common knowledge jo! I feel insulted. : )</div><div>But if you realy demand i answer....with 2 back to back diodes it is never too difficult to determine the BCE.</div>

<div>As for the switching... a good transistor implementation of an SR (or S&#39;R&#39;) Latch.</div><div>(Or a simple common astable multiviber) &lt;- I first saw this in the Physics by Abbot...remember this book?</div>
<div>
<br></div><div>P.S. I did not Google. I know it are fact because of my Digital Logic &amp; Electronics Learnings!</div><div><br></div><div></div><div><font><font><div><font face="arial, sans-serif"><span style="border-collapse:collapse"><span style="font-size:13px"><br>

</span></span></font></div><div><font face="arial, sans-serif"><span style="border-collapse:collapse"><span style="font-size:13px"><br></span></span></font></div><div><font face="arial, sans-serif"><span style="border-collapse:collapse"><span style="font-size:13px"><br>

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</span></span></font></div></font></font><div><font face="&#39;courier new&#39;, monospace"><span style="font-family:arial"><font><font><font color="#006600" face="&#39;courier new&#39;, monospace"><span style="white-space:pre-wrap"><b>Good judgement comes from Experience.</b></span></font></font></font><div>

<font face="&#39;courier new&#39;, monospace"><span style="white-space:pre-wrap"><b><font color="#cc0000">Most of that comes from Bad Judgement.</font></b></span></font></div></span></font><div><div><font><font><font><div>

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<br><br><div class="gmail_quote">2011/12/5 aki <span dir="ltr">&lt;<a href="mailto:aki275@gmail.com">aki275@gmail.com</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

<div>@Steve, @TheMburu,  I don&#39;t think they give schematic diagrams out but I think there is  process where one can buy through Japan or even the regional representatives. When I worked with them for a short while many years ago, the diagrams did not reveal the processor details but had depth details like scope patterns etc for the processors pinouts. I can tell you it is extremely complex but creates the same interest too. </div>

<div class="HOEnZb"><div class="h5">
<div> </div><div> </div><div class="gmail_quote">On Mon, Dec 5, 2011 at 8:51 PM, Steve Obbayi <span dir="ltr">&lt;<a href="mailto:steve@sobbayi.com" target="_blank">steve@sobbayi.com</a>&gt;</span> wrote:<br><blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class="gmail_quote">


<div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:10pt">By the way @Aki does sony avail their circuit diagrams to consumers?</div></div></blockquote></div>
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