Simple enough with a few twists I need some help with.
1. First off when I download the service manual http://www.manualslib.com/manual/987...90.html#manual
, I get the correct tv.. until I get to the schematics. Nothing matches. It has IC's in the 700 mine are 500. Don't understand
2. P.O. told me he took off the back and looked at the caps. check the inverter picture. He more than looked at them. Underneath ok. but still very concerned about this board.
3. Which brings me to the first and real problem. No 5 volts with main board unplugged so I know it is on the ps board. This supply runs the bridge rectifier at 160 volts on standby all the time. Then it jumps to around 380 when powered up.
Ok.. here is where I need help. Since I cannot find a power supply diagram or schematic for this.. I do not recognize the 5 volt supply path from the bridge rectifier to the output connector. . I have 166 volts on the Bridge Rectifier. (power off) and measuring from neg side of large cap (circled on pic) I have 46 volts when measured on both sides of the fuse (also circled).
Don't know if that is way low or ok... and I am stuck at this point.
I can run a multimeter, measure voltages, check diodes, resistors, fuses.
not so sure of myself testing mosfets, regulators and chips but I am learning.
so if you can help me find the missing standby.. I would appreciate it.
1. First off when I download the service manual http://www.manualslib.com/manual/987...90.html#manual
, I get the correct tv.. until I get to the schematics. Nothing matches. It has IC's in the 700 mine are 500. Don't understand
2. P.O. told me he took off the back and looked at the caps. check the inverter picture. He more than looked at them. Underneath ok. but still very concerned about this board.
3. Which brings me to the first and real problem. No 5 volts with main board unplugged so I know it is on the ps board. This supply runs the bridge rectifier at 160 volts on standby all the time. Then it jumps to around 380 when powered up.
Ok.. here is where I need help. Since I cannot find a power supply diagram or schematic for this.. I do not recognize the 5 volt supply path from the bridge rectifier to the output connector. . I have 166 volts on the Bridge Rectifier. (power off) and measuring from neg side of large cap (circled on pic) I have 46 volts when measured on both sides of the fuse (also circled).
Don't know if that is way low or ok... and I am stuck at this point.
I can run a multimeter, measure voltages, check diodes, resistors, fuses.
not so sure of myself testing mosfets, regulators and chips but I am learning.
so if you can help me find the missing standby.. I would appreciate it.
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