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Old 05-29-2020, 06:47 AM   #21
techtiger
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Quote:
Originally Posted by Motherfinboard View Post
Some components are getting warm as soon as I plug in DC,without even pressing power button. Components near dc in and the copper heatsink pipe.
Thanks
if components are getting hot you having a short in the MB what are the Components getting hot uplode a pic of the area ?
check the resistance to gnd R523 with out power ?
what voltage you get Q503 Source side ?
check U500 pin 2 3 4 5 12 voltage be care full don't short the pins ?
find out the voltage on L12 & L18 coil voltage page 7 Schematic?

Last edited by techtiger; 05-29-2020 at 07:08 AM..
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Old 05-29-2020, 12:57 PM   #22
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Quote:
Originally Posted by techtiger View Post
if components are getting hot you having a short in the MB what are the Components getting hot uplode a pic of the area ?
check the resistance to gnd R523 with out power ?
what voltage you get Q503 Source side ?
check U500 pin 2 3 4 5 12 voltage be care full don't short the pins ?
find out the voltage on L12 & L18 coil voltage page 7 Schematic?
Getting hot around D502,Q504 jumper wire,fuse501,L500,C532,R523 and capacitors around it.
Also other side of board warm inside red circle.

R523= 3.5 omhs Q503= 2.3v
Pins on U500, 2= 2.9v 3= 2.9v 4= 3.0v 5 = 187v 12= 2.73
L18= 20.5v L12= 0.5v

Thanks
Attached Images
File Type: jpg IMG_20200528_144119~2.jpg (615.9 KB, 13 views)
File Type: jpg IMG_20200529_185304~2.jpg (817.0 KB, 17 views)
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Old 05-31-2020, 02:17 PM   #23
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Results of short to ground with jumper wire removed.
Q504 drain stg,fuse501 no stg,c504 1pin stg,c503 1pin stg,
D502 no stg,c532 1 pin stg,c524 no stg,R521 no stg,
L500 no stg,R523 2 pins stg,c538 2 pins stg,
c534 2 pins stg,c533 2 pins stg.

Cheers Olly
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Old 06-10-2020, 04:39 AM   #24
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Hi, I have 096.7 kilo ohms on pin 1 and 25.75 kilo ohms on opposite pin of L506,after rechecking with black lead to ground red lead to the pins on L506.
I wonder if this is correct still attached to board no power connected?

Thanks Olly
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Old 06-22-2020, 09:58 AM   #25
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Pictures of the parts soldered back onto board with changed n channel.
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Old 06-24-2020, 03:23 AM   #26
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

I now have a blue light when plugging in ac adaptor,but still no fan spin when pressing power button?
Anyone have any idea where I can check on the board next please.
Thanks
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Old 07-03-2020, 08:36 AM   #27
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

So I have lifted 1 pin on each of L513,L516 and still only a blue light doing anything from the board,CPU fitted and without CPU.
Can anyone confirm I have the cable connected from the board to power button is fitted the correct way on both ?

Thankyou
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Old 07-03-2020, 10:32 AM   #28
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Cable is reversed, it won't make contact with the connector pins.
Also no point in messing with the CPU inductors, but would be a good idea to replace the NEC Tokin.
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Old 07-03-2020, 10:53 AM   #29
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Reversed both ends so blue tab down?
It's what another member recommended to lift the conductors as his tried helping me from the start.

Thanks
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Old 07-04-2020, 06:26 AM   #30
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

I now have fan spin and 2 blue lights on with AC adaptor. L513 L516 soldered back to board are both showing 0.988v with power on?
Doesn't seem to be correct voltage to me.
Still have a black screen too.

Cheers
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Old 07-04-2020, 06:54 AM   #31
techtiger
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Voltage is correct for that line now check again all coils what voltage is missing
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Old 07-04-2020, 06:57 AM   #32
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Could be the NEC tokin cap as piernov suggested ?
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Old 07-04-2020, 06:58 AM   #33
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

If it is the NEC Tokin,do you know which 4 replacement chips to use so I can try.
Cheers
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Old 07-04-2020, 09:21 AM   #34
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Use 330F SMD aluminum polymer capacitors from the CPU VCore section of a donor board.
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Old 07-06-2020, 03:10 AM   #35
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Default Re: Toshiba A200 Equium 6050A2109401-MB-A02 dead no power

Here is test of all coils,well I think all coils.
L513=1v ,L516=1v, These to are getting hot?. L503=1.10v, L501=193v not good?. L25=1.25v, L18=5.16v, L12=3.4v, L2=1.87v, L506=19v, C532=19v, L500=19v.
Cheers
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