Re: Samsung 243T: Inverter issue (?)



Thanks for the advice!

I'll try asking the local Sumida distributor. According to Sumida product site, the CIOH175 is still in production, so there could be a chance of finding someone who sells them separately!...

Re: Samsung 243T: Inverter issue (?)

Sweet, a clever yet simple way to test it!

Results are that the two transformers with infinite secondary coil resistances do not light up their CCFL at all. However, their CCFLs flash on just fine when connected to other transformer sockets.

Disconnecting all but one CCFL had an effect on the flash-on time, increasing it from milliseconds to about 1 second.

I wonder how those 2 transformers got burnt in the first place, is it just aging or perhaps some current shock has occurred in the past?

...

Re: Samsung 243T: Inverter issue (?)

Forgot to mention in the original post that I identified the inverter controller, which is on the backside of the board, to be [URL="http://www.ges.cz/sheets/o/oz960.pdf"][B]OZ960[/B][/URL]. Click the link for datasheet.



Could this imply that when a transformer coil is damaged, the controller chip simply shuts down the operation? Hmm, I wonder how this fits together with the fact that the FFCL's DO light up for a moment on powerup.Re: Samsung 243T: Inverter issue (?)

Forgot to mention in the...

Re: Samsung 243T: Inverter issue (?)

Took a better picture of the inverter board now.

I've only spotted that 1 fuze next to the input cord on the board, and measured its resistance as less than 1 ohm.

Measured U9 with the diode-testing setting on my multimeter and compared the results to U7. It seems that PIN1 - PIN8 gives a reading of about 450 on both of them to the same direction.

Same with PIN3-PIN8, 450 on both, same direction....

Hello!

I just recently bumped into this forum, and was impressed by the amount of detailed replies people get to their troubleshooting threads. This motivated me to register and start one of my own!

The target for this troubleshoot is a Samsung SyncMaster 243T, 24" PVA-panel monitor, manufactured in 2006.

For general info, I have some knowledge of electronics, and a 20$ multimeter at hand.

When powering on, the monitor flashes on the CCFL backlights for a split second, and then goes dark. I can get the backlights to quickly flash on again...