Samsung 2233sw '2sec to black'. Need guidance please.

[dmddmd]

another 2sec to black - Samsung 2233bw

Hi all!

I'm trying to repair my Samsung 2233bw lcd and i ran into dead ends.

Symptoms - after powering on, backlight turns off after 1-2 seconds.

All caps looks good (didn't test them becouse I don't have equipment to test capacitors).

All diodes and transistors checked good.

Inverter transformers:

Transformer 1 - pins 1 and 3 = 1104 ohms
- pins 2 and 4 around 3 kohm

Transformer 2 - pins 1 and 3 = 1108 ohms
- pins 2 and 4 around 3kohms

What else could be the problem?

Thank you in advance

[TheNinjaGinger]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

just wanted to chime in to thank badcaps.net and everyone in this thread. I was able to quickly and cheaply repair one of my broken monitors because of others had recorded their model specific trials in detail and left me bread crumbs.

Replaced the infamous inverter transformer in my 2233sw for under $15 and it fired right up!

Thanks guys!

[budm]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

I use Panasonic FM/FR/FC series for ALL my repair.

[jfcarbel]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

I have this same model and issues. Capacitors are bulged and bad. As newbie listed in his post on caps numbers on board:

newbie:

Cap A - don't know what brand, dark blue color, what i can see is W0C PET, rating hidden below, 4x11 (estimated mm as i am using ruler, not calliper)
Cap B - Samyoung, NXB 330uf 10V, 7x10
Cap C - Samyoung, NXH 1000uf 10V, 10x12
Cap D - Samyoung, NXB 820uf 25V, 10x20
Cap E - don't know what brand, dark blue color, what i can see is WF W9C PET, 47uf 50V, 6x10
add: oops i just noticed while typing that i missed C116, i think its the same size with C114 (Cap A) but light blue in color.

What would be good replacements for these - Panny FM, Nichicon, or Rubycons MCZ ?

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Hi Everyone,

After waiting over months (parcel lost from China),(wrong model sent from an eBay user) and also another lost parcel that arrives 3 months after, i had soldered the new transformator TM-0815 and everything is back to LIFE :P

Yes sir! The monitor works again!

Thanks to everyone that help us with your guide.

Thanks a lot!

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

It's what i'Ve done. Need to wait another 3-4 weeks. Got damed!! I received the AP45026 and installed. Just wait for the transformator new one.

[Rtech]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

If you ordered the correct one,and received the wrong one, then send it back.

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Hi,

I had order the transformer TM-0815 and received TM-10160. Did someone know if they had an change on an new specs?

Because specs are différents.

TM-0815 is Secondairy 875 ohms and TM-10160 Secondairy 940 ohms. It will not fit?

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

No, not the same body case as the STU.
Get them from EBAY?

Yep! I was reading this post and not check the correct # on the board. I has another model # than other member here. So i had order it without double verification.

Its new but can't install it. I will order the proper one.

[budm]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

No, not the same body case as the STU.
Get them from EBAY?

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

so i can't used it?

[budm]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

. D1, D2 are tied together internally.



The AP has much lower current spec.

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

HI everyone,

I had an question.

My Mosfet U202 is #STU312D. Did the AP4506GEM is the same parts? Can i use it to replace my STU312D?

Thanks

[Rtech]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Inverter transformers can have different resistance,,

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Looks like you need a new transformer...check Ebay with the number on the top of the transformer

It's what i've done yesturday at noon. I had read all this forum and order on eBay for 8$ a new transformator. I had also order the Mosfet chip to must be sure.

Question: Did you know what is the proper value for mesuring a new transformator (what is the normal range ohms)?

Thanks for help and when i will received my parts and repair it, i will let you know for any status on that.

I like to play in electronics and fix my stuff, im proud! It's great to fix some electronics and save money. Also it's give an second life to my monitor.

I like this forum and all the peoples how help us.

Thanks a lot!

[Rtech]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Looks like you need a new transformer...check Ebay with the number on the top of the transformer

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

I have marked two sets of pins on the inverter transformer.One red pair and one white pair.Measure each pair using the restance range on your meter and advise.

Transformer is unsoldered and mesured:

Red pins show 1.976 kOhms
White pins show 0.894 kOhms

[Rtech]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

I have marked two sets of pins on the inverter transformer.One red pair and one white pair.Measure each pair using the restance range on your meter and advise.

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Hi,

I had unsoldered all the capacitor and mesured all of them, and everything seem to be ok.

See attached file for results.

[8ternity]

Re: Samsung 2233sw '2sec to black'. Need guidance please.

Hi Everyone,

Here is the picture of the power board. I Also need to precise all symptômes.

1rst: When we open the monitor, the monitor open, the screen show input and the screen turned off and goes black. The monitor still get open (power is on, power lights is still there, audio is still there).

Can i had some help to know about the symptômes, what can be cause that? Capacitors, mosfet, transformator?

Thanks for help! I want to get back in life my monitor.