My best garbage find yet.
LG 50PS3000 with intact screen. (50" 1080p 2009 plasma panel.) Back cover was present but ALL screws missing so guessing someone had a fiddle. All boards in the set though and all cables hooked up. Minor damage to main board speaker cable but looks repairable.
Found PSU fuse missing but couldn't find any shorts on the PSU so presume this was a diagnosis step but forgotten about by someone. Think set might have had the common pink tint issue as found two shorted FETs on Z-sustain near Vzbias generate & bias ckt. Since fuse on Z-sustain was OK & Vzbias regulator FET was OK, I suspect the shorts could have made PSU cycle on and off (the regulator FET would not have any current limiting.)
Will replace Q13,Q14 & Q15, plus PSU fuse and with any luck it should work. There is always the chance of bad panel due to vertical line on these but usually it is minor and I'm not complaining for a freebie.
LG 50PS3000 with intact screen. (50" 1080p 2009 plasma panel.) Back cover was present but ALL screws missing so guessing someone had a fiddle. All boards in the set though and all cables hooked up. Minor damage to main board speaker cable but looks repairable.
Found PSU fuse missing but couldn't find any shorts on the PSU so presume this was a diagnosis step but forgotten about by someone. Think set might have had the common pink tint issue as found two shorted FETs on Z-sustain near Vzbias generate & bias ckt. Since fuse on Z-sustain was OK & Vzbias regulator FET was OK, I suspect the shorts could have made PSU cycle on and off (the regulator FET would not have any current limiting.)
Will replace Q13,Q14 & Q15, plus PSU fuse and with any luck it should work. There is always the chance of bad panel due to vertical line on these but usually it is minor and I'm not complaining for a freebie.
Comment