DCAC40A4 power converter failure
I removed the DCAC40A4 power converter from my Optiquest (ViewSonic) Q9 Model No. VS11201 LCD monitor. I was looking for a bad capacitor like so many mention but didn't find any bad. Then I noticed one of the two blue capacitors on the high voltage side is splitout on its side. I want to try and replace it but the info on the capacitor makes no sense
F .33J
PMD 250V
The period (.) in front of the 3 is actually positioned half way between the top and bottom of the 3. I have tried looking up this part but cannot find it anywhere. Can you help me identify this part?
F .33J
PMD 250V
The period (.) in front of the 3 is actually positioned half way between the top and bottom of the 3. I have tried looking up this part but cannot find it anywhere. Can you help me identify this part?
Computers & Internet - ViewSonic - Optiquest - Optiquest Q9b 19" Flat Panel LCD Monitor
Answers & Comments
This is too funny. I have a Norwood lcd monitor with the same problem. It has the same exact board. I started to troble shoot and it is pretty tough without schmatics but there is a diode (d301) that I am getting a dead short across.
I think this is a dipped .33 uf or 3300pf 250v cap. I thought tantalum, but none are available at 250v, so I think it is ceramic.
http://www.badcaps.net/ has a forum and a section for computer displays. There is a recent post on a viewsonic there.
digikey.com has low cost/order shipping fees, mouser.com has parts too.
tom
When you open up one of these you are best off replacing ALL the capacitors.
I found the same fail capacitor on my DCAC40A4 board. I replaced a good one but the problem is still existed, the power LED is blinking. Do you have any recommendation for this problem?
My diode look likes short but it is OK after I removed it from the PCB. I think there is something damage and has not been found yet.