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[Moved] ic number not visible in (smps)

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seekerofknowledge

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Hi Friend/z

I am new to this forum and i hope i will get some help to this problem.

I have a computer power supply Compaq, Product of china, Series PDP 118.

The problem is there is one broken ic in which the number is not visible to replace it so i want that number or equivalent one.

here i will upload images of that power supply

https://imageshack.us/photo/my-images...icture2oi.jpg/
https://imageshack.us/photo/my-images...icture3hc.jpg/
https://imageshack.us/photo/my-images/19/picture4pu.jpg/
https://imageshack.us/photo/my-images...icture5jx.jpg/
https://imageshack.us/photo/my-images...icture6pa.jpg/
https://imageshack.us/photo/my-images...icture7hc.jpg/
https://imageshack.us/photo/my-images...icture8gd.jpg/


That ic is in primary section

There is one more good similar ic the number of that ic is

J242
TOP243Y
21041C

IMAGE OF THAT GOOD IC IS https://imageshack.us/photo/my-images/19/picture4pu.jpg/


THX IN ADVANCE
 

Re: ic number not visible in (smps)

All your image links are broken and in addition you should attach them in the post

Don’t upload your files to external servers and post the links, these files will be deleted after a while and the thread will become useless, attach your files in the post. Moderators will delete any posts that includes files uploaded to file sharing servers like Rapidshare, 4shared etc. Try to uploads compressed formats that are easily opened by different operating systems, zip is preferred over rar or 7zip and note that the attachments should never be password protected.
Click to expand...
 

Re: ic number not visible in (smps)

alexan_e said:
All your image links are broken and in addition you should attach them in the post
Click to expand...

Ok sir sure. i will re post images.

- - - Updated - - -

Picture 2.jpgPicture 3.jpgPicture 4.jpgPicture 5.jpgPicture 6.jpgPicture 7.jpgPicture 8.jpg
 

Re: ic number not visible in (smps)

Hi seekar can you help me regarding smps troubleshooting my smps is desktop atx 400w please help me my smps not getting start when shorting its green (ps_on) and black (ground) pins. only fraction of fan is rotate and stops. please tell how to go through testing and troubleshooting also there is no bulged capacitors in it ..

- - - Updated - - -

Hi seekar can you help me regarding smps troubleshooting my smps is desktop atx 400w please help me my smps not getting start when shorting its green (ps_on) and black (ground) pins. only fraction of fan is rotate and stops. please tell how to go through testing and troubleshooting also there is no bulged capacitors in it ..
 


Re: ic number not visible in (smps)

peter_england said:
Hi seekar can you help me regarding smps troubleshooting my smps is desktop atx 400w please help me my smps not getting start when shorting its green (ps_on) and black (ground) pins. only fraction of fan is rotate and stops. please tell how to go through testing and troubleshooting also there is no bulged capacitors in it ..

- - - Updated - - -

Hi seekar can you help me regarding smps troubleshooting my smps is desktop atx 400w please help me my smps not getting start when shorting its green (ps_on) and black (ground) pins. only fraction of fan is rotate and stops. please tell how to go through testing and troubleshooting also there is no bulged capacitors in it ..
Click to expand...

I think the problem is in secondary section, i remember once i faced the same problem, when i replaced the ic in secondary section it was alright, but before replacing ic try to check surrounding components. But i am sure the ic is the culprit.

- - - Updated - - -

Tahmid said:
It's probably a TOPSwitch. The manufacturer logo on the 3rd picture looks like the Power Integrations logo.

http://www.powerint.com/products/product-archive/topswitch-gx
http://www.powerint.com/products/topswitch-family/topswitch-hx
http://www.powerint.com/products/topswitch-family/topswitch-jx
**broken link removed**
Click to expand...

Any particular number of the TOPSwitch so that i can replace it with out any fear?
 

seekerofknowledge said:
There is one more good similar ic the number of that ic is

J242
TOP243Y
21041C
Click to expand...

So, there are two ICs in the primary section and one of them is damaged?

You could probably use a TOP249 or TOP250. However, before using a TOPSwitch IC, ensure that the damaged part is a TOPSwitch IC, by comparing the circuit you have with the pinout and schematics given in the datasheet and other documentation.
 

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