[Solved] Samsung UE32J4100AW TV: Choosing Between FAN6755U and FAN6755W for BN44-00696A Module

Hello. The S3330 system in the BN44-00696A power supply module. It is probably FAN6755, only with the letter U (operating frequency 65kHz) or with the letter W - 130kHz? Although both versions are available, I don't want to do more damage if I miss.

A small but significant amendment. Conversely, the system with the letter U works with f-130kHz, and with the letter W- 65kHz.

I would suggest buying a new system at Impelshop - SEM3330.

The author of the information from the page http://www.kenotrontv.ru/forum/gallery/image/2306-%D0%B1%D0%BF/ states that in the BN44-00696A power supply the S3330 system without modifications can be replaced by the FAN6755 system. However, it should be remembered that the FAN6755, FAN6755W and FAN6755UW are different systems.

And e.g. from this forum link
* 203d6 (NCP1203D6)

Work system org. S3330

Come on, since the original is available.

foxes, recommending some alteration, although you would write that it was made to ...
I know that it can be on hand, if not, it is several times cheaper.
But the spec should add that disconnecting pin 1 is a mistake. Use a conversion compatible with the application.

As for the author's question

dariuszj wrote:

It is probably FAN6755, only with the letter U (operating frequency 65kHz) or with the letter W - 130kHz?

External elements and the transformer used (generally its inductance) indicate that it is rather above 100kHz.
When you start it, you'll have the opportunity to personally check how often the system works to provide nominal output voltages.
And by the way a question for those willing - is it safer to insert the system with a higher or lower nominal operating frequency in such a situation?

Piotr2608 wrote:

I would suggest buying a new system at Impelshop - SEM3330.

That was it. By the way, I learned that it is about SEM3330. I was looking for S3330 but none of that. Thanks for the help.

Somewhere here on the forum described conversion to NCP1207A with PIN1 disconnection. I don't know how it worked for someone. Unfortunately, the system did not work for me. Anyway, comparing a typical NCP1207A application with a real system, there are big differences.

Added after 29 [minutes]:

Renso wrote:

The author of the information from the page http://www.kenotrontv.ru/forum/gallery/image/2306-%D0%B1%D0%BF/ states that in the BN44-00696A power supply the S3330 system without modifications can be replaced by the FAN6755 system. However, it should be remembered that the FAN6755, FAN6755W and FAN6755UW are different systems.

Unfortunately you are wrong. FAN6755 and FAN6755W are identical systems (note the method of printing on the casing of the system. In the case of the system with the letter W, the 6755 print is in line with the WTPM print. However, in the case of FAN6755U the 6755U string is the same as in the first case of WTPM). it is a layout in two variants 6755 and 6755U or 6755W and 6755UW if you prefer. Architecturally both versions are the same except for the "programmed" operating frequency.
Of course, this does not mean that they are interchangeable.

dariuszj wrote:

Somewhere here on the forum described conversion to NCP1207A with PIN1 disconnection. I don't know how it worked for someone. Unfortunately, the system did not work for me. Anyway, comparing a typical NCP1207A application with a real system, there are big differences.

Well, the fox gave you the link.
And I also wrote something on this topic.
However, since you say that there are big differences between the typical NCP1207 application and the SEM3330 solution in THIS power supply, then be so nice and just describe them? Because in my opinion they are not so big at all.
So a properly made prosthesis on NCP1207A should work.
So it may turn out that you put in a new SEM, and it will still be bowel.

Quote:

a correctly made prosthesis on NCP1207A should work.

It will not work.

The author probably got it wrong in the description of the system !?

Will work with NCP1203D6 (60kHz, and 100 / i 40) on condition
- disconnection of pin 1 NCP (air)
* resistor ladder desoldered from the SEM application
- compare both systems. work: connection pin.5 NCP ... to the field gate


_____________________________
In some solutions pin.1 NCP is connected via R = 39k / or 47k to ground

I will also give two pictures.
Please show significant differences that cannot be exchanged.
Maybe a friend @Ibuprom will speak to you.

Hello
Finally, some information. The original system works at a frequency of about 65kHz. The conversion with FAN6755 works without any problem. However, the conversion with NCP1207 for me probably did not work because of the damaged MOSFET key. Damage to the transistor is unusual because it did not have to pass or short circuit. After repairing the power supply, the conversion on the NCP1207 was not checked. Ultimately, I put the original SEM3330. For information about the original layout, points for @ Piotr2608 . For all thanks for help.