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| Acer Q5WPH (LA7912P) on and off https://vlab.su/viewtopic.php?f=59&t=31059 |
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| eletmoraes [ 03 апр 2015, 08:20 ] | |
| Заголовок сообщения: | Acer Q5WPH (LA7912P) on and off |
It is initialized and off shortly after 5 s. Voltage on pin 8 of U36 memory is 2.2V. Tension in PL7 coil is 5v and PL6 coil is 3.3V. Measurements obtained without the use of the processor. |
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| 2N3904 [ 03 апр 2015, 13:09 ] | |
| Заголовок сообщения: | Re: Acer Q5WPH (LA7912P) on and off |
Try this: http://t-hex.livejournal.com/174832.html |
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| eletmoraes [ 04 апр 2015, 04:11 ] | |
| Заголовок сообщения: | Re: Acer Q5WPH (LA7912P) on and off |
soldered components in FQ6 and FQ7 around but the problem continues. I noticed that seem to lack a component that should be a resistor near the FQ7 marked with a circle watching the picture. I think it's a 100k connected in FQ7 pin gate 2 Posted after 4 minutes 37 seconds: have this component in the circuit and at the plate? |
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| 2N3904 [ 04 апр 2015, 10:03 ] | |
| Заголовок сообщения: | Re: Acer Q5WPH (LA7912P) on and off |
Marked resistor must be 100k (PR28). |
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| eletmoraes [ 04 апр 2015, 23:13 ] | |
| Заголовок сообщения: | Re: Acer Q5WPH (LA7912P) on and off [РЕШЕНО] |
put a resistor 100k taken from another board scrap and turn on the notebook the same again work perfectly. Many thanks to friend 2N3904. Topic completed. |
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