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| Vaio VGN-FZ11M (MBX-165 MS90) Does not power on https://vlab.su/viewtopic.php?f=55&t=30195 |
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| zibi1998 [ 10 мар 2015, 20:01 ] | |
| Заголовок сообщения: | Vaio VGN-FZ11M (MBX-165 MS90) Does not power on [РЕШЕНО] |
Hello, I solved the problem with this board, it was little wet with coca-cola and after that it stopped powering on. Due to Cola I had to replace IC PU5 (MAX8734AEE) and IC PU11 (SOT23-5, marking 922BN, part numer G922T12U) had to be replaced. But I had problem to quickly buy G922T12U working as 8,5V voltage regulator (only available in China, long shipment time) so I replaced it with LT1761-SD with following modification. 1. I had to cross pins 3 and 5 of LT1761-SD with wires (pin 3 goes to pad 5 on PCB and pin 5 goes to pad 3 on PCB) 2. Resistor PR231 and PR232 stay as they are (59k and 10k) The original IC (G922T12U) you can also find on other laptop motherboards from Sony: MBX-217 M850, MBX-165 MS91 Use datasheets for details (available in internet). Cheers zibi |
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