I bought this TV today with the complaint of appears dead, confirmed. I removed the back and tested the A/C in fuse which was OK. Main cap voltage at 165V. After further testing it looked to me like the whole secondary side of the board was dead with no 3.3V stand-by present.
I pulled the PSU and had a look, nothing obvious showing, so I went to ShopJimmy and looked for a PSU repair kit which they had, here is the link: https://www.shopjimmy.com/sony-1-474...repair-kit.htm .
I checked the components the kit called for. None of those transistors checked short ( I could not locate Q6123 and 6124) and all of the resistors were OK save for R6201 which checks open in one direction and very high resistance in the other.
When I look at the trace it appears voltage comes from the main caps, goes through R6201 to what appears to be a 12V transformer. When I trace the circuits off of R6201's circuit it looks like they all wind up at that transformer.
Based on what I see it looks like this single resistor being open will result in no voltage to the transformer down range and the secondary side of the board?
Can someone have a look at the pix and see if you draw the same conclusion? I put arrows on R6201 to make it easier to see.
Thanks everyone!
I pulled the PSU and had a look, nothing obvious showing, so I went to ShopJimmy and looked for a PSU repair kit which they had, here is the link: https://www.shopjimmy.com/sony-1-474...repair-kit.htm .
I checked the components the kit called for. None of those transistors checked short ( I could not locate Q6123 and 6124) and all of the resistors were OK save for R6201 which checks open in one direction and very high resistance in the other.
When I look at the trace it appears voltage comes from the main caps, goes through R6201 to what appears to be a 12V transformer. When I trace the circuits off of R6201's circuit it looks like they all wind up at that transformer.
Based on what I see it looks like this single resistor being open will result in no voltage to the transformer down range and the secondary side of the board?
Can someone have a look at the pix and see if you draw the same conclusion? I put arrows on R6201 to make it easier to see.
Thanks everyone!
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