Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
After replacing the cap bios chip PIN 8 any voltage change & power button any change?
After replacing the cap bios chip PIN 8 any voltage change & power button any change?
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Last edited by Techtiger; 01-30-2019, 08:40 AM. -
Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
resistance in PL13 ? PL13 +3VPCU present ? PD26 PIN 2 15V ?Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Since there is no Voltage in BAT+ . I have measured the voltages on the charging IC chip and they are as follows
PU10 ( ISL88731CHRTZ )
Pin 2 - 3.54 ( ACIN)
Pin 3 - 3.16 ( VREF)
Pin 4 - 0 Volt (ICOMP)
Pin 6 - 0Volt (VCOMP)
Pin 8 - 0 Volt (ICM)
Pin 9 - 3.36 ( SDA)
Pin 10 - 3.36 (SCL )
Pin 11 - 3.34 (VDDSMB)
Pin 13- 3.93 ( ACOK)
Pin 15 - 0 Volt (VFB)
Pin 17 - 0 volt
Pin 18- 0 Volt
Pin 20 - 0 volt
Pin 21 - 5.05
Pin 22 - 18.95
Pin 23 - 0 Volt
Pin 24 - 0 Volt
Pin 25 - 4.95
Pin 26 - 5.05
Pin 27 - 19.38
Pin 28 - 19.38
Is this IC faulty ? Please help.Last edited by IamPritesh; 01-31-2019, 02:44 AM.Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Now measure the Resistance on the same chip.Just cook it! It's already broken.Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
My expextation should be 200K or more on PD28 pin2, ( maybe your lead probe black on point and red probe on gnd, right)Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Yes red on ground and black on the test point. Multimeter set at 2K ohms range.
How exactly is the 15V generated . Does this diode internally increase the voltage from 5V to 15V ?
Update : If I set the multimeter range at 20K then I get 5.99 resistance on PD28 Pin 2.Last edited by IamPritesh; 01-31-2019, 03:46 AM.Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Seem fine if ~500K.
What voltages on PQ65 and PQ44?Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Now, measure the resistance on PD27 pin2Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
Here: on Page 35
https://cdn.badcaps-static.com/pdfs/...ed6b68ec05.pdf
I think because drop 15V be 10V, the problem had effect to MAIND signal, didn't generated 5V_S5 be 5V and so on.
EDIT: should be page 36Last edited by on/off; 01-31-2019, 04:32 AM.Comment
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Re: Sony MBX 247 Laptop Dead. Need help ( Pics attached )
I small Q did you reflash the bios or test to see if the chip it's ok?Just cook it! It's already broken.Comment
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