Samsung Monitor 206bw

[killivolt]

I replaced the bad Caps which is typical. I have already repaired 3 other samsung monitors a bit newer no troubles all went well with them.

This one is a 206bw I was able to get it to turn on but, the bottom of the screen is dim.

I suspect the back light. The top half is looking good, maybe I could get voltages off it somehow. If so, how would I approach it?

Any suggestions.

 

[Nigel Goodwin]

If the bottom half is dim, it sounds like the backlight tubes aren't all lit.

A common problem is the inverter transformers, I changed one in a Samsung TV/Monitor this week - it was a single (large) transformer, with two distinct halves. One secondary half read 1.1K, the duff half read 1.8K - the new one I fitted read 1.1K on both halves.

 

[Exo]

That monitor should have 2 ccfl's. I'd try to swap their connectors around first. If this causes the top half to be dim then you know the inverter is broken and not the ccfl itself.

 

[ben7]

I replaced the bad Caps which is typical. I have already repaired 3 other samsung monitors a bit newer no troubles all went well with them.

This one is a 206bw I was able to get it to turn on but, the bottom of the screen is dim.

I suspect the back light. The top half is looking good, maybe I could get voltages off it somehow. If so, how would I approach it?

Any suggestions.

How old were those monitors?

 

[killivolt]

If the bottom half is dim, it sounds like the backlight tubes aren't all lit.

A common problem is the inverter transformers, I changed one in a Samsung TV/Monitor this week - it was a single (large) transformer, with two distinct halves. One secondary half read 1.1K, the duff half read 1.8K - the new one I fitted read 1.1K on both halves.

I noticed that transformer, I'm guessing your saying 1.1k ohms and not 1.1kv. If the Transformers is bad. Is it possible to rob one from a different monitor? I'm sure there not cheap.

 

[killivolt]

How old were those monitors?

Not sure, I found them in our surplus and snatched them before they went to the public. I noticed all of them had the same problem. I figured easy fix. I measured ESR on all ther caps on the board. Only 2 bulging 1k caps.

 

[killivolt]

That monitor should have 2 ccfl's. I'd try to swap their connectors around first. If this causes the top half to be dim then you know the inverter is broken and not the ccfl itself.

That thought occurred to me as I started the thread. I didn't think about it again till now.

Thanks.

 

[Nigel Goodwin]

I noticed that transformer, I'm guessing your saying 1.1k ohms and not 1.1kv. If the Transformers is bad. Is it possible to rob one from a different monitor? I'm sure there not cheap.

Yes, 1.1K ohms

Assuming you can find an identical one, then swapping it would be fine - as long as it's OK.

A new one wasn't expensive though, about £12 plus VAT.

I had a good day - I replaced an inverter transformer in a Samsung 19 inch set, I fitted a new inverter board in a Toshiba 42 inch set, and replaced two bare PCB's (just connectors and tracks - one board was burnt in half) and a damaged CCFL tube inside a Sharp 32 inch LCD panel

 

[killivolt]

Yes, 1.1K ohms

Assuming you can find an identical one, then swapping it would be fine - as long as it's OK.

A new one wasn't expensive though, about £12 plus VAT.

I had a good day - I replaced an inverter transformer in a Samsung 19 inch set, I fitted a new inverter board in a Toshiba 42 inch set, and replaced two bare PCB's (just connectors and tracks - one board was burnt in half) and a damaged CCFL tube inside a Sharp 32 inch LCD panel

Wow:O Excellent.

A new one wasn't expensive though, about £12 plus VAT.

That price it would be ok. I don't have an account with anyone, how could I get it? Who are the common suppliers in the states that would sell me one without being an authorized repair center?

 

[Nigel Goodwin]

Wow:O Excellent.


That price it would be ok. I don't have an account with anyone, how could I get it? Who are the common suppliers in the states that would sell me one without being an authorized repair center?

Can't help you in the states, but we aren't Samsung agents either, that price was retail from a wholesaler (CHS in Pocklington).

 

[killivolt]

Thanks, I'll plug in the part # on the transformer. Maybe I'll get some hits off the net.

 

[Nigel Goodwin]

Thanks, I'll plug in the part # on the transformer. Maybe I'll get some hits off the net.

Have you checked it?, see if it reads faulty?.

 

[killivolt]

Tomorrow, I'll probably switch the ccfl's and test the transformer.

At least I have some clues to chase before I call it quits.

Thanks for all the info

 

[killivolt]

I switched the connectors on the ccfl's with no change. Just for the hell of it I measured the Transformer. 1.076k and 1.070k.

I thought maybe if the transformer was going bad it would shorten the life of a bulb.

I will end up using this monitor I'll switch it out for one in a classroom running a network clock for the professors . The big red number are in the center of the screen. It will never be noticed.

Thanks for all the help.

kv