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marcdima replied to equivalent for ic switching power supply control

in Troubleshooting Power Supplies and Power Supply Design

01-29-2013, 04:13 PM
Re: equivalent for ic switching power supply control

thank you [COLOR="blue"]Khron666[/COLOR] for your explanation
I thought even if the internal diagram is different the result is the same, but this is not the case

hi [COLOR="blue"]budm [/COLOR] the FA3647 blown up

I hope that these pictures in attached files are clear to you because the board is a little big.
the board is fragile the slightest shock can break him just as you can see in
the picture in extremity of board but this is not a big...

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marcdima replied to equivalent for ic switching power supply control

in Troubleshooting Power Supplies and Power Supply Design

01-29-2013, 09:15 AM
Re: equivalent for ic switching power supply control

thanks for your reply retiredcaps
the problem, not everyone can buy over internet this is not problem of money but this is a policy of my country unfortunately

that why i search for equivalent parts in others board.

If a photo of the board can help I can take a photo and upload it .

the dc voltage in Vcc pin of
power ic FA5317 fluctuate between 9V to 16V

the test voltage in secondary ( diode shotky) = 0.7V

it is a complex supply...

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marcdima started a topic equivalent for ic switching power supply control

in Troubleshooting Power Supplies and Power Supply Design

01-20-2013, 02:40 PM
equivalent for ic switching power supply control

hi guys,

I need your help

to tell you I am not a professional on electronic

I repair office machines (copier, laser printer ...)

I have a problem with a power supply board for a copier

apparently had a hard blow

many components are burned

I tested and changed I think the majority of burned components (bridge rectifier, filter capacitor, some resistance)

the problem I do not found the original circuit FA3647 I replaced by FA5317
and a transistor 2SA1015 by A733
...

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

11-05-2012, 09:50 AM
Re: Analog ESR meter design

all things are clear now thank you very much...

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

11-04-2012, 01:54 PM
Re: Analog ESR meter design

thank you [COLOR="Red"]Simurg[/COLOR]
for the new link I see that you are the author of this great work
I like the way you made the testing pads for testing the surface mounted cap. , I try to do something similair .

thank you [COLOR="red"]tom66[/COLOR] for the explanations
you're right it's very clever

for resistors I only found standard SMD 1R0
I think tolerance will influence on the accuracy of measurement , I do not have a choice .Re: Analog ESR meter design

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

11-02-2012, 10:29 AM
Re: Analog ESR meter design

Unfortunately, this link does not work now
[url]http://radiokot.ru/konkurs/10/[/url]
but luckily I saved the diagram (see picture)

I would really like a small explanation of this diagram
I'm not a pro of electronics but I have basic notion
I always learning in this field

I understood
In this diagram the power source is a 1.2V battery rechargeable

the transistor VT1 used as a constant current source to approximately 50mA current given...

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marcdima replied to No sound, USB, or webcam on Satellite L505D-LS5006

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-01-2012, 06:30 AM
Re: No sound, USB, or webcam on Satellite L505D-LS5006

vous ne pouvez pas dessouder une puce BGA avec un simple fer a souder ce n'est pas possible il te faut une station de rebillage qui te coutera pas mal d'argent
mais tu peut tenter la refusion de la puce ( Reflow) pour cela il te faut une station de soudage a air chaud avec temperature reglable en utilusant le flux de desoudage pour une bonne refusion...

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

10-22-2012, 06:39 AM
Re: Analog ESR meter design

thank you guys I am trying to collect components

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

10-21-2012, 12:42 AM
Re: Analog ESR meter design

thank you [COLOR="Red"]MDOC[/COLOR] I did the translation I wanted to say rather it is not well translated

thank you [COLOR="red"]vhr[/COLOR] this is what I wanted to know
and thank you again for useful documents

I need just know the capacitor C2 = 6200* !!! , and I give a try . What is the value of this one ?Re: Analog ESR meter design

thank you [COLOR="Red"]MDOC[/COLOR] I did the translation I wanted to say rather it is not well translated

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marcdima replied to Analog ESR meter design

in Equipment Usage, Soldering, Techniques, and Reviews

10-20-2012, 01:18 PM
Re: Analog ESR meter design

good link

someone has tested this assembly
really interesting but unfortunately the schema is not clear to me especially value of component
I tried to translate the page but I do not understand much ...

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