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Sony MBX 247 Laptop Dead. Need help ( Pics attached )
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by on/off View PostShould be half of voltages of VIN
Good news..
Have you check PGOOD1 after 15VPCU get normal?
Also we need to know about RTC_RST# and SRTC_RST# and ACIN.
Yes i think we are progressing in the right direction
NO PGOOD1 yet because there is no MAIND signal to power the EC with +3V
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by on/off View PostShould be half of voltages of VIN
ACIN voltage is 3.3Last edited by IamPritesh; 02-03-2019, 10:29 AM.
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Actually didn't know power sequence on this model (HK1) a bit different with HK8 (mostly come to my bench) S5_ON signal turn ON after pressing PwrBTN. While HK1 seem S5_ON turn ON (actually on your board) after plugin adapter.
What I've been thought that First EC need supplied by 3.3V, for purpose this only need EN2 ON and OUT2 present. Meanwhile EN1 (S5_ON) delayed or after by Pressing PwrBTN, this could be happen. Even if bios didn't supplied by 3V providing that EC got supply it could be. If HK1 should be like this, so S5_ON seem this signal premature.
Found Power of sequence but don't know is correct or not.Attached Files
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by IamPritesh View PostAlso what should be the ideal voltages on gate of PQ67 and and PIN2 of PQ68 before the power button is pressed.
I also want to thank you for supporting me this far. You all are amazing.Last edited by on/off; 02-03-2019, 09:14 PM.
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by IamPritesh View PostAnyone has any suggestion as what should I check next. I think we have progressed well so far after we have achieved 15VPCU.
Wondering why Pgood1 is not generated on PU9
Thanks.Last edited by Techtiger; 02-05-2019, 10:42 AM.
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
I noticed that 3V was generating fine but 5V was not generating as it should. The output of COIL PL14 had 5V but the input side showed no voltage. 3.3 volt was generating just fine.
I tried replacing the PU9 IC and now I dont even have the 3.3 volt. What could have gone wrong ?
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by techtiger View Postmay be bad soldering test vin
pin 6
pin 7 LDO
pin 32
pin 3
pin 19
yeah it was indeed bad soldering but now I have resoldered it almost pretty good but no luck.
Pin 6 - 19V
Pin 4 - 5.5
Other pins have no voltage.
Have I damaged this IC due to bad soldering?
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Originally posted by on/off View Post- +3V_SPI come from +3V_S5 via R61 (short pad), When PQ44 ON require trigger from RVCCD (approx 12V).
- S5_ON generated 15VPCU be RVCCD.
- Maybe bios not working had effect KBC not work well.
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