If those readings are in meg-ohms then it could be ok?
Im going through a similar process on another model(s10a) with same 42 panel as this so alot will be similar.
My pins varied from printed guides for other models so check your manuals for your models pins to be sure VSCN-F etc are on the pins they should be.
Long story short, at SU41:
VSCN-F 220k ohms is near enough to normal according to the manuals I have - IF that was the 0.2 in meg ohms you read at SU41? and vfo was 1.5m?
Expected approx readings(from 2010_FHD_Plasma_TV_G25_Series_Troubleshooting_Handbook.pdf):
VFO 2.2m
VSCN-F 221k
5V_F 5.7m
and from another guide:
VFO 1.9m
VSCN-F 220k
5V_F 6.3m
Vfo was more interesting.
With Black to VF_GND and Red to VSCN-F measuring point i get 6.2-7.5mohm on 20m resistance scale and no contunuity on diode check or continuity beep settings.
With Red to VF_GND and black to test point i get no reading on any resistance scale(not oL, just open). However with meter set to diode test i do get a reading of 1.0x - on continuity beep setting i get nothing.
The schematics i have for my s10a chassis are missing the SC/SU boards so have to assume with the leads switched the path taken by the supplied current from the dmm is passing through a diode or transistor etc or both, and the positive diode reading is possibly a good sign. As i mentioned on continuity beep setting- i get nothing.
Some patience was needed on measuring the m-ohm readings as they took a while to get a stable number too.
All taken with SC board removed and SU SD ribbon disconnected etc.
I'm not 100% sure what all this means yet but I was fairly confident before reading this that my su/sd boards are ok after checking the various isolation procedures, despite some of the numbers being a bit off the guide they are stil in the mohm range and far from dead shorted.
Also i'm still testing for certainty and wouldn't say i was 100% sure of anything at this stage. If i had my tv working after all this i might be more certain but it will be a couple of weeks before i finish diddling with the sc board and replacement parts etc and find out. fwiw i have not posted yet about my issues but plan to start a thread sometime with my notes on journeys with similar problems but they are looking to be the same as folks in this thread:
Your situation may be different but these panels do seem to be tossing out similar SC issues on various models from the searching ive done lately and i noticed your numbers look suspiciously close to the expected values from the pana guide if they were taken on 20m range. *or in tw2005's post # 58 in this thread: https://www.badcaps.net/forum/showth...t=26322&page=3
Goodluck, hope this helps and sorry if it wasted your time :-)
hi sorry for the long delay after discovering i might have a bad buffer as well i put this on the back burner hoping i could get a donor still not found one so going to have a bash if you all agree this possibly could be repaid in the light of what DoubleDratt88 said about the buffer possibly being ok
hi sorry for the long delay after discovering i might have a bad buffer as well i put this on the back burner hoping i could get a donor still not found one so going to have a bash if you all agree this possibly could be repaid in the light of what DoubleDratt88 said about the buffer possibly being ok
I was thinking U10B & S11B but you'd have to check if these were UK market. Would not it be just as easy if you just looked up the model in question and track down the manual to find the SC part number to work it out or search the model in FlatTV parts and see what boards come up?
Post 16 has some part numbers. what can't you work out?
There's a couple of guys who had some success, including one repair shop in that post. Maybe send them a PM and they may have some tips especially the repair guy as he may be able to assist with the parts .
you got me on this one. You had 7 blinks, starts ok with A and PSU alone, now nothing with it all hooked up. Take a stab and hook everything except SC20 ribbon. Can you post a good picture of everything in one shot from the back for a look.
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