Question about Acer 22" X223w LCD Monitor

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Acer X223W power supply

Have taken the monitor apart have taken the PSU to one side, but no aparent damage. Have identified all the capacitors - I think as, -

Type Voltage micro farads Tolerance

KMG 400v 68 20%

KY 35v 220 20%

KY 6.3v 1000 20%

50v 22 20%

KNB1560 275vac 0.33 10% C>=0.1 uf 1

and will replace all. Have I missed any? Which components are the voltage inverters, and what are there model numbers - just in case the capacitor fix doesn't work. Additional help will be appreciated.

I'll post disassembly instructions for the monitor shortly.


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The voltage inverters are the small transformers attached to a small pcb, that is connected to the backlight inverter (cold cathode).

Just in case replacing the capacitors did not work, the second thing to do is to check the backlight inverter. If there is busted light, replace this one too..the last thing to check is the high voltage ballast transformer... if one of these is burnt, it is enough to affect the stability of your supply current. It can also result to a dark portion on your screen or worst , could result to a total black screen..

If you can replace this transformer with the same value, please do so.

If this is a help to you.. please rate this solution...thanks.

Posted on May 28, 2010

Testimonial: "No separate PCB's on power supply, but your advice did make me check out the PCB further, so thank you for your advice. I will be undertaking identification of the inverters. On this model the inverters are built into the PCB, above the power supply input. "


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