Toshiba satelite c650 not working

[FastEddy]

Hi guys and dolls,

For a friend I am trying to find the fault on C650, 6050A2355301-MB-A03, MAS10M.

I am using the schematic attached.

Measurements as follows,
Adaptor only no Battery on

NOTHING WORKING NO LIGHTS NO FAN COMPLETELY DEAD.

Battery pins =

1=0v
2=0v
3=0v
4=0v
5=1.02v
6=0v
7=0.01v
8=3.53v
9=3.53v

CN6000 = 19v

R6036 = 0v~0.02v
R6013 = 1.66v ~ 0v
R6016 = 18.8v ~ 0.00v
R6000 = 8.53v ~ 8.53v

L6000 = 3.52v ~ 3.48v
L6001 = 19v ~ 19v

FUSE6000 = 19v ~ 19v
FUSE6100 = 3.53v ~ 3.52v

D6000= 1.66v - 3.85v - 3.50v
D6001 = 0.01v - 5.37v - 5.54v
D6002 = 5.43v - 5.43v - 8.54v

Q6004 = 5.33 - 0v - 0v

U6000 =

1 = 0v
2 = 0v
3 = 18.88v
4 = 5.49v
5 = 0.07v
6 = 1.07v
7 = 8.54v
8 = 3.48v
9 = 3.65v
10 = 5.45v
11 = 3.51v
12 = 3.51v
13 = 3.51v
14 = 0v
15 = 3.51v
16 = 3.51v
17 = 0v
18 = 0.01v
19 = 1.66v
20 = 5.35v
21 = 4.09v
22 = 5.40v
23 = 0v
23 = 0v

U6200 =

8 = 3.2v
15 = 0v
16 = 3.52v
17 = 3.52v

Hope above info can help, I think the problem is staring me in the face but I am not skilled enough to figure it out yet.

[FastEddy]

Re: Toshiba satelite c650 not working

Hi,
Does anybody have any ideas for this problem?

[cyberhack]

Re: Toshiba satelite c650 not working

The toshiba is fast asleep, remove battery cmos press power button for 30 sec
then plug in the brick that should do it power up

[rievax_60]

Re: Toshiba satelite c650 not working

What voltage is +VBAT?

[FastEddy]

Re: Toshiba satelite c650 not working

Thanks for reply, the Voltage at +VBat = 3.51v

[FastEddy]

Re: Toshiba satelite c650 not working

Tried the 30 sec PW button no change

[smali]

Re: Toshiba satelite c650 not working

Try to flash bios.

[meritosari]

Re: Toshiba satelite c650 not working

Might be this case similar with old thread, you can learn it.

Pin 10 (ACOK) must be low, indicate ac adapter present.

According datasheet:

"AC Detect Output. This open-drain output is high impedance when ACIN is lower than 1.485V.
The ACOK output remains high when the MAX17435/MAX17535 are powered down. For a typical
application, use a 10k ohm pullup resistor to LDO (pin 4)".

[rievax_60]

Re: Toshiba satelite c650 not working

As far as I can tell, all of the conditions are right for ACOK to be low.

[FastEddy]

Re: Toshiba satelite c650 not working

Hi all,
Spent the day getting more voltage measurements and putting them onto the schematic.
This might give you more insight into the problem.
It is only the first 4 pages of schematic but more to follow later.
Hope you can see the problem
thanks
FastEddy

[meritosari]

Re: Toshiba satelite c650 not working

Here measurement of MAX normal condition.

Acok must be 0V, then
PDSL appear be 25V

First Check Q6002 and Q6005 (resistance D-S-G)
Second, Possibly the IC MAX has failed to work.
Third, make sure VBAT have no short to ground.

[FastEddy]

Re: Toshiba satelite c650 not working

There is definitely low voltages in places to what there should be with highest only of 18v. I need to find out why I am not getting the 20+ volts especially at PDSL which is showing 0v. Also Acok is 5.29v and should be 0v

[inflex]

Re: Toshiba satelite c650 not working

You might want to be checking / looking for a short. In particular look at the 0805 ceramic caps around the switch mode regulators. Look at the surface of the caps very carefully and don't be surprised if you see some cracks on one.

Put your multimeter in to diode mode and start checking the values, should be 0.3V or higher usually, if you get anything like 0.01 then you've got a short most likely.

It's a fairly easy way to spend half an hour under the magnifying glass in good light, but it often reveals faults without having to do much else.

https://www.youtube.com/watch?v=ZtFH1gn25h0