Re: emachines e19t6w inverter powersupply help
Yeap.
Because in the very beggining I have just that on hands...
After that blows up, I bought the exactly one that the board has...
Do you think that are problems with this difference?
many tks!...
jselvatici
Member
Last Activity: 10-25-2010, 12:44 PM
Joined: 05-03-2010
Location: São Paulo - Brazil
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Re: emachines e19t6w inverter powersupply help
Well, now I have 0.24 ohms resistor (Is exactly the same as the original that was installed before).
Facing this resistor, my board don't look like the one in the file vg1930wm-1_sm.pdf ?? (Page 62)
tks....Leave a comment:
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Re: emachines e19t6w inverter powersupply help
I have the same clue... But I was checking for the transformer, and this SPW-055 is not so easy to find.
Here where I live, will be much harder..
Something else to check before goes to transformer replacement?
Tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Okay,
D805 there's no 5V DC on it. and the transformer is not provinding any voltage. D803 has the same behavior.
I did the diode check on both and the results are:
D805 -> Between 1 and 2 = 0,150 ohm and is the same for 3 and 2.
also, if you go in the reverse way, the multimeter is giving me 1.520 ohms. Is not suppose to not conduct in this way? or is this type of diode?
D803 -> Between 1 and 2 = 0,300 ohm and is the same for 3 and 2.
Nothing on...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Guys,
Something is no good on this transformer or before it. When I take a GND as a reference, I have 308V in the pin 1 and 308V on pin 3, but nothing in the output. Also, If I check voltage between pins 1 and 3, no voltage. Is this not DC voltage?
Tks!Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Let's take this side as a secondary, all the pins (6 , 7 , 8 , 9 , 10 , 11) are shorted and they measure less then 1.0 ohm between each other.
When the transformer is installed in the PCB, it shorts 6-7 than 8-9 than 10-11. (see picture available)...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
WOW!!! I saw this manual and the board is EXACTLY the same as I have!!!!
If I find one like this to buy, can fix my problem and I can have more time to fix the bad board... Someone knows were I find one like this?
Also, I'm moving and will measure some other points, because this wiring manual helps a lot!
Keep you all posted. Tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Here we go...
I'm goingo to work now, so I will not be able to take any picture for few hours..
But let's keep moving...
tks a lot!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Sorry! GND is not on Pin 4 but on Pin 5.
On Pin 4 there was nothing....Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Just one thing, I have 308Vdc going to Pins 1 and 3 take a GND as a reference. Pin 4 I have GND. Measuring in the other side, no reading at all, looks like a bad transformer... what do you think? Shall I remove it from the PCB to take a better look?
Tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
The diagram says that the transformer has 8 pins, but here it has 11 pins.
I see the main voltage input, but hard to identify which pins are the right output voltage....Leave a comment:
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Re: emachines e19t6w inverter powersupply help
No luck my friend...
I change the FET, Resistor, the Fuse and the 47uF Cap and no 5VDC in the output...
Any new idea?...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
I measured some components and looks good, the only thing now is the Main fuse is open, I have to wait to buy one like that... may be tomorrow I can power up the board again. (I already replace the resistor and the FET)
Tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
This is the FET that I changed because it was all shorted....Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Here is:
1) I would start at D801 and test it in circuit with ohms to make sure there are no shorts since D801 feeds right into R805.
-> D801 (the rectifier) is okay, it only goes in the direction to convert AC to DC and the values are 631ohms.
2) Test R805 out of circuit to ensure it meets the proper ohms value to the color code.
-> I dont know if I can trust on reading because part of it came off, so it reads 1k5ohms. Picture available
3) Retest...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Hi, I'm back... I could not wait until get home to still working on this, let move...
1) Okay, please disclose everything else that you found BEFORE you posted. Letting us know about the bad NCP and open resistor is something we need to know. Was anything else replaced or found wrong?
[B]-> yes, since the problem begins, I replaced the NCP1337, the resistor (R805)(looks like a fuse-resistor), the FET that is marked with S G D, and 2 SMD's resistor (R807) and (R831).[/B]
2) I'm assuming you are...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Without the logic board connected.
tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
Okay,
I'm going to work now, and as soon I'm back home, I can do those actions.
Please wait few hours.
Tks!...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
1) The datasheet for NCP1337 is at
You will need to download that and refer to it for voltage measurements. Pin 4 is your ground. Please list voltages for all pins.
[B]-> Taking the Pin 4 as ground, the voltage is Pin 1= 0VDC Pin 2= 0VDC Pin 3= 0VDC Pin 5= 11VDC Pin 6= 0VDC and Pin 8= 275VDC[/B]
2) Did you replace NCP1337 before you posted here or after? It matters to know when you replaced it.
[B]-> I replace it after the problem. The only thing is, the previous component was...Leave a comment:
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Re: emachines e19t6w inverter powersupply help
NCP1337
It's a 7 pin IC
I have replaced it, because it was cracked (very easy to identify).
I will post the pictures. I got those.
Yeap, here is almost 3am.
tks for your help....Last edited by jselvatici; 08-25-2010, 12:02 AM.Leave a comment:
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