Sunday, January 1, 2012

Samsung SyncMaster 204B Power Supply Repair

Samsung SyncMaster 204B PSU PCB


The SyncMaster 204B is a very nice 20.1" UXGA (1600x1200) panel circa 2006.
I really like this aspect ratio but everything has gone widescreen and a monitor like this is basically no longer available.

The CapXon caps bulge and fail and before complete failure the monitor flickers more and more since the caps are on the switching power supply that powers the backlights. I think only the three caps after the chopper were bulging on this unit.

See: http://en.wikipedia.org/wiki/Capacitor_plague

Opening the monitor is a PITA and you don't want to do it twice so replace all the caps the first time. Use flush cutting side cutters to cut away as much of the leads and solder as you can. Solder wick rubbed with flux and pressed into what remains will loosen the caps to the extent that they will almost fall off the PCB.

More info:

http://tinymicros.com/wiki/Samsung_SyncMaster_204B_LCD_Repair

A proper parts list is a stumbling block for some people. These parts are perfect for my board rev 0.1 as of December 2011. These are not the cheapest possible parts but the parts with the longest lifetime ratings.

Digi-key part numbers



9 comments:

  1. This comment has been removed by a blog administrator.

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  2. Well good for you Benjamin you got the tools and the skills. When I broke mine, I was devastated because having it repaired would cost as much with no assurance that it will last longer.

    -Lawrence Banks

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  5. Use flush cutting side cutters to cut away as much of the leads and solder as you can. 300w acdc adapter power supply

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  6. I've replaced all the caps on a rev 0.1 board but that didn't solve the problem. Can I buy a rev 0.0 board and use that? I don't see anyone selling complete rev 0.1 boards.

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