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<blockquote data-quote="MrSoul" data-source="post: 1829160" data-attributes="member: 403240">I found the electrical schematic of a Liteon PE324101UN-LF power supply (which also seems to be used in other iMacs), there seems to be some info, but I can only guess the usefulness of these pins....On the 12V output (2x6 pins)<ul>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 1 &gt;&gt;- +12V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 2 &gt;&gt;- +12V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 3 &gt;&gt;- +12V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 4 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 5 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 6 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 7 &gt;&gt;- +5VS</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 8 &gt;&gt;- +5VS</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 9 &gt;&gt;- +5VS</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 10 &lt;&lt;&lt;- AC_DET (Alternating Current Detection?)</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 11 &lt;&lt;&lt;- P_DIM (Power DIMming?)</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 12 &lt;&lt;&lt;- BL (LCD BackLight?)</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 12 &lt;&lt;&lt;- PS_ON (PowerSupply ON !)</li>
</ul>On both 24v outputs (1x12 pins)<ul>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 1 &gt;&gt;- 24V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 2 &gt;&gt;- 24V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 3 &gt;&gt;- 24V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 4 &gt;&gt;- 24V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 5 &gt;&gt;- 24V</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 6 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 7 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 8 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 9 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 10 &gt;&gt;- GND</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 11 &lt;&lt;&lt;- P_DIM (Power DIMMING?)</li>
<li data-xf-list-type="ul">&nbsp; &nbsp; Pin 12 &lt;&lt;&lt;- BL_ON (BackLight ON?)</li>
</ul>For AC_DET, I found this definition:AC adapter voltage detection input. Valid AC adapter input range is set using resistors forming a voltage divider which are connected between ACDET &amp; GND and ACDET &amp; AC adapter.P_DIM should reduce the output power of the 24V PINs to reduce the brightness of the display?BL_ON, turn on the LCD?In short, full of new questions.</blockquote>

[QUOTE="MrSoul, post: 1829160, member: 403240"] I found the electrical schematic of a Liteon PE324101UN-LF power supply (which also seems to be used in other iMacs), there seems to be some info, but I can only guess the usefulness of these pins.... On the 12V output (2x6 pins) [LIST] [*] Pin 1 >>- +12V [*] Pin 2 >>- +12V [*] Pin 3 >>- +12V [*] Pin 4 >>- GND [*] Pin 5 >>- GND [*] Pin 6 >>- GND [*] Pin 7 >>- +5VS [*] Pin 8 >>- +5VS [*] Pin 9 >>- +5VS [*] Pin 10 <<<- AC_DET (Alternating Current Detection?) [*] Pin 11 <<<- P_DIM (Power DIMming?) [*] Pin 12 <<<- BL (LCD BackLight?) [*] Pin 12 <<<- PS_ON (PowerSupply ON !) [/LIST] On both 24v outputs (1x12 pins) [LIST] [*] Pin 1 >>- 24V [*] Pin 2 >>- 24V [*] Pin 3 >>- 24V [*] Pin 4 >>- 24V [*] Pin 5 >>- 24V [*] Pin 6 >>- GND [*] Pin 7 >>- GND [*] Pin 8 >>- GND [*] Pin 9 >>- GND [*] Pin 10 >>- GND [*] Pin 11 <<<- P_DIM (Power DIMMING?) [*] Pin 12 <<<- BL_ON (BackLight ON?) [/LIST] For AC_DET, I found this definition: AC adapter voltage detection input. Valid AC adapter input range is set using resistors forming a voltage divider which are connected between ACDET & GND and ACDET & AC adapter. P_DIM should reduce the output power of the 24V PINs to reduce the brightness of the display? BL_ON, turn on the LCD? In short, full of new questions. [/QUOTE]

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