Acer da0zq0mb6e0 rev e no power

[kalilinux25]

Board has no reading if plug with powersupply, PU1 reading
I really need help about this board

ACN -18V
ACP-18V
ACOK-0V
LCDRV-0V
ACDET-2.5V
REGN-5.9V
VCC-18V

(BQ24737RGRR)
SCHEMATIC IS ATTACHED

[piernov]

Re: Acer da0zq0mb6e0 rev e no power

Everything is fine here. Measure power rails.

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

Everything is fine here. Measure power rails.

I've check the 3v and 5v ic

In pin 8 I get 5V but inthe PL3 has no voltage output
Vin- 18v
EN1-3.5V
pgood- 0V
drvh1- 0v
VREG3- 3.3V
VREG5- 5V
EN2-3.3V

[emestee]

Re: Acer da0zq0mb6e0 rev e no power

You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.

Thanks fior the response sir but now I dont have any oscilloscope.

[qayyum786]

Re: Acer da0zq0mb6e0 rev e no power

check the impedance of pu3 coil pl2 and pl3

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

check the impedance of pu3 coil pl2 and pl3

pl2 1.5kohms
pl3 1.5k0hms

[emestee]

Re: Acer da0zq0mb6e0 rev e no power

pl2 1.5kohms
pl3 1.5k0hms

That's normal. Coils do not fail generally. You can use an $20 DSO138 or similar to test PWM drivers - its bandwidth is limited so you won't be able to test eg 33MHz clocks but for testing but PWMs, EC oscillators etc it works (however you need 1:10 probe for oscillators). In my opinion even without testing, given the circuit and your measurements, there is high chance the controller is dead.

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

That's normal. Coils do not fail generally. You can use an $20 DSO138 or similar to test PWM drivers - its bandwidth is limited so you won't be able to test eg 33MHz clocks but for testing but PWMs, EC oscillators etc it works (however you need 1:10 probe for oscillators). In my opinion even without testing, given the circuit and your measurements, there is high chance the controller is dead.

thanks for the concern on replying , great help ,I ll justo order OSCILLOSPE

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.

I already tested the board it has a pmw signal sir,
I also test the filterng caps at the PC42 its ok

[kalilinux25]

Re: Acer da0zq0mb6e0 rev e no power

also im missing my 3v in vcc of my sio chip?