Dv6700 dead, only adopter light in on

[hispeck]

Hello, DV6700 , dead but when i plug the adopter the light come on only, i checked mosfet pq30 pin 5.6.7.8 19v pin 1.2.3. 0v pin 4 0v, but mosfet is ok

[Techtiger]

Re: Dv6700 dead, only adopter light in on

Check PU1 pin 1.10 for Voltage ? PQ31 pin3 ?
May be the Fet number is not correct upload the Schematic

[hispeck]

Re: Dv6700 dead, only adopter light in on

Ok, i will, thanks

[hispeck]

Re: Dv6700 dead, only adopter light in on

Here is schematic, thanks for your help

[ktmmotocross]

Re: Dv6700 dead, only adopter light in on

u r senior member. u must know that u must start with measure charger ic pins

but is it worth it? that nvidia NB was same shit like nvidia GPUs

[Techtiger]

Re: Dv6700 dead, only adopter light in on

Here is schematic, thanks for your help

test all this voltages

[hispeck]

Re: Dv6700 dead, only adopter light in on

u r senior member. u must know that u must start with measure charger ic pins

but is it worth it? that nvidia NB was same shit like nvidia GPUs

Hello, sorry i thought i said i tested the pq30 which i got only 19v on pin 5.6.7.8. pin 1.2.3. no output even pin 4

[ktmmotocross]

Re: Dv6700 dead, only adopter light in on

Hello, sorry i thought i said i tested the pq30 which i got only 19v on pin 5.6.7.8. pin 1.2.3. no output even pin 4

do u know what is charger ic?

[hispeck]

Re: Dv6700 dead, only adopter light in on

do u know what is charger ic?

yes, max8724 is the chargilng ic for this laptop, meanwhile on this board i found this components short ..[ pu8 TL331 ] and pq27 IMZ2, i dont have exact numbers , which one can i use as replacement ? IMZ2 is shoted all the legs

[hispeck]

Re: Dv6700 dead, only adopter light in on

test all this voltages

i test pr133 one end is 17v and 0.05v same with PD22 17v and 0.05v

[Techtiger]

Re: Dv6700 dead, only adopter light in on

PU8 is the Operational Amplifier remove PQ27 with out power test shot to GND all legs if still short you’re have 5 resistance & 3 caps to test in this circuit may be one of the caps bad

[Techtiger]

Re: Dv6700 dead, only adopter light in on

i test pr133 one end is 17v and 0.05v same with PD22 17v and 0.05v

Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30

[hispeck]

Re: Dv6700 dead, only adopter light in on

Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30

So what should i do?

[hispeck]

Re: Dv6700 dead, only adopter light in on

PU8 is the Operational Amplifier remove PQ27 with out power test shot to GND all legs if still short you're have 5 resistance & 3 caps to test in this circuit may be one of the caps bad

I already removed pq27 there was no short on board, when i tested outside circuits still shorting

[hispeck]

Re: Dv6700 dead, only adopter light in on

Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30

pr133 value is 100k, with my DM i get 99.89k

[Techtiger]

Re: Dv6700 dead, only adopter light in on

pr133 value is 100k, with my DM i get 99.89k

ok then the out put side is short that's why no out put for PQ30 pin 4 , test pc176 pr132 & PQ56 PR233(BATDIS G)
VH28 = 28V only 17V at this point

[Techtiger]

Re: Dv6700 dead, only adopter light in on

So what should i do?

may be some one else can help i cannot find out in Schematic from where that 28V come in

[piernov]

Re: Dv6700 dead, only adopter light in on

I think it's this section that's acting as a charge pump.
Not exactly sure how it works but I think the opamp circuitry around PU8 is an astable multivibrator and PQ27 is some sort of "buffer" to charge/discharge the capacitor PC88 and not affect the characteristics of the astable multivibrator.
This just creates an oscillator for the charge pump (centered around PD12, the dual diode on top right, I cut the markings in the screenshot…) to work

[Techtiger]

Re: Dv6700 dead, only adopter light in on

I think it's this section that's acting as a charge pump.
Not exactly sure how it works but I think the opamp circuitry around PU8 is an astable multivibrator and PQ27 is some sort of "buffer" to charge/discharge the capacitor PC88 and not affect the characteristics of the astable multivibrator.
This just creates an oscillator for the charge pump (centered around PD12, the dual diode on top right, I cut the markings in the screenshot…) to work

Thanks piernov for the explanation i thought PU8 was a Operational Amplifier.
HISPECK the curcit you must get rid of the short

[smali]

Re: Dv6700 dead, only adopter light in on

Remove PQ22 and then check pq30 gate (pin#4) voltage?
And also check voltage on PD8 on both side..