need help with aegis 152TA touch screen

tofutofu · Joined: 24 Jan 2012 Posts: 15

HI

trying to reaper the Aegis 152TA 15" touch screen.

as I connected the 12v power supply wrong polarity, I suspects I damage it Embarassed

the problem: not turning on.

things I tried:

opening the screen, I sow a bad capacitor (exploded), replace it with different capacitor from shop ( look diffident, but I have been told it's same):

old cap- (22 25a)

new cap (22mf 50v)

to be cont..

tofutofu · Joined: 24 Jan 2012 Posts: 15

checking the screen after replacement - no change

I checked the power board- I could see that the 5V pin show 0v ( 12v OK):

testing the diode (disconnect 1 leg) show it is fine.
so I suspect the U13. ( is it a voltage regulator?)
need help with that

the part number is:1796-50a G3417A

thank you

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

5Volt switching regulator made by Taiwanese outfit Aimtron
Manufactured part number AT1796-50
Probably not easy to find locally. I have had good luck with utsource.net for the oddball stuff but it will take time coming from the east.

tofutofu · Joined: 24 Jan 2012 Posts: 15

thanks

I will try to get it...