Ps64e8000 powersupply troubleshoot

[ant17]

hi i have bn44-00516a power supply out of a samsung ps64e8000 tv which transistor failures in the pfc circuit and the main switchmode supply ic failed taking some tracks with them and the tv has some missing smd caps which i do not know the value of cx814 and cx812 cx813
and the smd cap cx826 which goes the across the switchmode ic is missing also but i need to know where the track that runs between it goes as it has partialiy missing peice where the red line is the track under cap to either one of those pins seen in the picture can anyone help

[tvtimmy]

Re: Ps64e8000 powersupply troubleshoot

You have to take closer, and clearer pictures of the board. Yours are to blurry when we zoom in.

[ant17]

Re: Ps64e8000 powersupply troubleshoot

in this image i know where yellow trace goes to but trace going underneath the missing cap i don't know if it take the path of the blue line or the red line

[diif]

Re: Ps64e8000 powersupply troubleshoot

Go to shopjimmy.com and stick your power supply model number, they have a decent high res photo, albeit slightly obscured by glue.

[ant17]

Re: Ps64e8000 powersupply troubleshoot

thanks have looked not much help thanks anyway

[R_J]

Re: Ps64e8000 powersupply troubleshoot

in this image i know where yellow trace goes to but trace going underneath the missing cap i don't know if it take the path of the blue line or the red line

The correct path is the red line, that is the vcc for pin4 of the ic

What are you using for a solder iron?

[lotas]

Re: Ps64e8000 powersupply troubleshoot

Look at the datasheet, it has a wiring diagram.

[ant17]

Re: Ps64e8000 powersupply troubleshoot

ok guys thanks i started this repair a few years and was using a yihua soldering iron which got me into trouble in the first place a forgot about until recently dough it out again i am now using a jbc dde soldering station

[R_J]

Re: Ps64e8000 powersupply troubleshoot

Based on a similar schematic BN44-00445C, that uses a ICE3BR1065JF
CX814 = 474/16v (1608) pin3
CX812 = 104/50v (1608) pin4
CX813 = 103/50v (1608) pin6

There is an electrolytic cap (CM802?) on the vcc line, it should be replaced as well, and CM801 could be also be weak.

[ant17]

Re: Ps64e8000 powersupply troubleshoot

thank you guys this most helpful