I am working on Samsung Model UN22f5000af, power led is on steady but will not turn on. This set is a 22 inch LED tv and monitor, no ccfl. This set is powered by an external 14v dc supply (measured at 14.26 v). Before I BREAK open the welded case can anyone suggest the acceptable ripple on that output and do you think any main board components would cause (no turn on) if ripple is too high. I have found service manual for this chassis, and of course NO schematic. It does have some troubleshooting info and I NEED some assistance with the nomenclature used.
Examples,,
1. A power tree diagram mentions supplies of "A5v_PW and B5v_PW" I assume 5 volts but don't know about the A or B or PW and neither one is anywhere near a PWM source.
There are several mentions of "SW_Power", what does SW mean? It does not seem switch dependent.
2. On silkscreen on PCB parts are labeled as "Qxxxx_AD or Qxxxx_JT or Rxxxx_PC"
What does AD,JT,or PC mean.
Also this is the only board in the set.
Photo is credited to SHOPJIMMY.COM
Examples,,
1. A power tree diagram mentions supplies of "A5v_PW and B5v_PW" I assume 5 volts but don't know about the A or B or PW and neither one is anywhere near a PWM source.
There are several mentions of "SW_Power", what does SW mean? It does not seem switch dependent.
2. On silkscreen on PCB parts are labeled as "Qxxxx_AD or Qxxxx_JT or Rxxxx_PC"
What does AD,JT,or PC mean.
Also this is the only board in the set.
Photo is credited to SHOPJIMMY.COM
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