42" plasma tv power Z Y boards...

robeliber · Joined: 29 Apr 2008 Posts: 4 Location: mexico

hi im new and im from mexico, i have problems with a 42" plasma tv, with LG YSUS ZSUS boards, the power suply board is samsung and im not sure if this one is ok, when i conect the Z board the voltage of power supply get down. What could be wrong? a technic told me that the Z and Y boards need to be changed he cheked and are wrong but im not sure if the power supply it ok, i hope you can help me. thanks

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

X or Y, Y or Z sustain board. It's always the last #. Replace the Z sustain, in this case, have been wrong before the sustain board on the right. Go for the Z does the main video processing.

gary · Joined: 05 Apr 2005 Posts: 584 Location: MANCHESTER, uk

for some models of lg plasma a repair kit is available containing both the sustain pcbs and the processing pcb, it is cheaper on its own than buying any one of the sustain pcbs!!!!

robeliber · Joined: 29 Apr 2008 Posts: 4 Location: mexico

thanks for your answers, im going to buy this kit: Repair Kit 6871VSNB03E, this one contains the Y, Z and CTRl boards, so im not worried about this pieces, what i don`t know if is working is the power supply because like i told you, when the ZSUS card is unpleged the power board get me 191 v in vs, but when i conect the Zboard the voltage disappear, so i don`t know if the problem is on the power board or in the ZSUS board, i hope you can help, thanks.

robeliber · Joined: 29 Apr 2008 Posts: 4 Location: mexico

hi, i have cheked it again and when i conect either z or y board the Vs voltage get down, but Va still having 68v, and +5v still being ok, so when i conect one of this boards only the Vs voltage get down, so i want to be sure that this problem is from the Z or Y boards, to be able to buy the reparation kit, or if this is a power suply problem to don`t buy it and try to fix the problem. thanks.

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

Welcome to plasma's. Seems with x/y disconnected VS and Va are ok indicating a good power supply. Hook either x/y up, Vs drops. Could be taken care of by replacing the kit, or, it's a bad PDP/panel. How much for the kit?

robeliber · Joined: 29 Apr 2008 Posts: 4 Location: mexico

so do you really think the power suply its ok? i need to be sure that this board is good, because if its, i will pay it now, i get it for £81 including shipping to mexico, what do u think¿?