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)
Replace the electrolytic capacitors on the submodule.
Snap a photo of a large connector: why purple ? May be violet ?
У кошки 4 ноги... Вход, выход, земля и питание.
@UAM
i replaced electrolytic capacitors. after short green and black not work.
why purple ? May be violet ?
Violet. a little confusing in english.
My English is also at the level of translate.google.com![:)](http://bios.rom.by/img/smiles/icon_smile.gif)
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...
У кошки 4 ноги... Вход, выход, земля и питание.
Hi UEM,
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)
Hi SpyFlash!
![](http://www.rom.by/files/Lamp.GIF)
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:
Place the image block to a more accessible (we) file repositories on the network. If possible reduce the amount of images
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
У кошки 4 ноги... Вход, выход, земля и питание.
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.
У кошки 4 ноги... Вход, выход, земля и питание.
I will try tonight. If found not i will ask you again tonight or tomorrow.
BTW thank for ur help.
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
pdf1.alldatasheet.com/datasheet-pdf/view/252415/VISHAY/TCET1104G.html
output Vce = 70
Vec = 7
i will test tomorrow.
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