Re: Sony KDL-55EX620, no stand-by volts from one bad resistor?
Right now we need to find out why AC_OFF_DET line goes to <1V when main board is connected and need to verify the stby3.3v pin with main board connected is at 3.3V or not, if 3.3V is much higer than 3.3V that can be problem.
NJM2884-33 is 3.3V (Vo of +/-1% ) LDO regulator, so are you sure your are getting 3.3V at the STBY3.3V pin of the power supply connector when main board is connected, or you are getting close to 4V or higher?
Ah found your post #24:
"There was 4.45V at the stand-by pin of CN6001 that became slightly unstable but returned to 4.45V and remained". So that NJM2884 is bad.
Long thread is hard to keep track of the Data.
Right now we need to find out why AC_OFF_DET line goes to <1V when main board is connected and need to verify the stby3.3v pin with main board connected is at 3.3V or not, if 3.3V is much higer than 3.3V that can be problem.
NJM2884-33 is 3.3V (Vo of +/-1% ) LDO regulator, so are you sure your are getting 3.3V at the STBY3.3V pin of the power supply connector when main board is connected, or you are getting close to 4V or higher?
Ah found your post #24:
"There was 4.45V at the stand-by pin of CN6001 that became slightly unstable but returned to 4.45V and remained". So that NJM2884 is bad.
Long thread is hard to keep track of the Data.
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