Автор: SpyFlash , 21 апреля 2011
Hi all,
I have some problem with my newton's power supply. The purple line have 5 volts but it can't start.
Then i decided to replace caps in secondary side but nothing change.
If anyone can help me please tell me howto fix it.
I attached some pictures of this power supply.

http://images.temppic.com/21-04-2011/images_vertis/1303360821_0.61997400.jpg
http://images.temppic.com/21-04-2011/images_vertis/1303360822_0.03474700.jpg
http://images.temppic.com/21-04-2011/images_vertis/1303360822_0.42686200.jpg
http://images.temppic.com/21-04-2011/images_vertis/1303360822_0.81690900.jpg
http://images.temppic.com/21-04-2011/images_vertis/1303360823_0.18954400.jpg
Содержимое данного поля является приватным и не предназначено для показа.
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UAM

14 лет 10 месяцев назад

Replace the electrolytic capacitors on the submodule.
Snap a photo of a large connector: why purple ? May be violet ?

SpyFlash

14 лет 10 месяцев назад

@UAM
i replaced electrolytic capacitors. after short green and black not work.
why purple ? May be violet ?
Violet. a little confusing in english.

UAM

14 лет 10 месяцев назад

My English is also at the level of translate.google.com :)
Replace the fuse on the incandescent lamp (~ 60W) for the protection of power transistors. Find optocoupler, which controls the main power
If the output is not short circuit, jumper pin 2 coupler to the ground and if the lamp is not lit, measure the output voltage...

SpyFlash

14 лет 10 месяцев назад

Hi UEM,

http://images.temppic.com/22-04-2011/images_vertis/1303445828_0.86788300.jpg

Replace the fuse on the incandescent lamp > Could u please make in snapshot? I don't know where is it. No lamp on this board.


Find optocoupler, which controls the main power > See in picture.
http://images.temppic.com/22-04-2011/images_vertis/1303446311_0.85306800.jpg

Back curcuit line of optocoupler
http://images.temppic.com/22-04-2011/images_vertis/1303447306_0.72151500.jpg

doomnik

14 лет 10 месяцев назад

Hi SpyFlash!
Incandescent lamp (lighting) does not belong to the scheme of your power supply. It is necessary to limit current consumption and to prevent failure of the circuit components.
For example:
https://rom.by/files/Lamp.GIF
Place the image block to a more accessible (we) file repositories on the network. If possible reduce the amount of images

UAM

14 лет 10 месяцев назад

What missing an element on the board ?

Yes, on-board 3 coupler. One - the stabilization +5 SB, the second - the stabilization of the main power supply and a third that we need.
With the closure of the green wire to black, it opens and enters the voltage on the PWM.
But if a few seconds leaving no voltage in output, with the coupler off the voltage

SpyFlash

14 лет 10 месяцев назад

Hi UAM,

How to find a schematic of this power supply? I don't under stand power circuit.

a third that we need = Is it near violet line (in picture above)? Could u please explain with picture diagram instead.

Thanks.

UAM

14 лет 10 месяцев назад

a third that we need = Is it near violet line (in picture above)?
No. May be its connect to to pin 3 bottom IS (WT7510?)

SpyFlash

14 лет 10 месяцев назад

I will try tonight. If found not i will ask you again tonight or tomorrow.

BTW thank for ur help.

SpyFlash

14 лет 10 месяцев назад

Hi UAM,
Sorry for late reply. today i have no time for testing coupler. but i found a datasheet of it (ET1104).

What missing an element on the board ? = miss answer... it is a transistor but i put it already.

here is a link of ET1104
http://pdf1.alldatasheet.com/datasheet-pdf/view/252415/VISHAY/TCET1104G.html

output Vce = 70
Vec = 7

i will test tomorrow.