Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
Sorry to keep bugging you. I'm about to give up on it. Any last suggestions?...
pswayze
Member
Last Activity: 04-24-2013, 07:18 PM
Joined: 04-21-2013
Location: Tucson, AZ
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
Tom, any ideas?...Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
I removed the transformer from the vertical board. For the life of me, I couldn't pinpoint what component the clicking was coming from. After removing the transformer, the clicking stopped but obviously it could have been any component in that circuit. There is still 98V across the FETs with that transformer removed....Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
All the FETs read 10K Ohm between the legs, and 5M Ohm between each leg and the base. It's like something is keeping the FETs from turning on?...Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
I've been patiently waiting for sunset. The screen does not glow at all even with a source playing....Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
I will try to find out but it will be a bit difficult because of the room it is currently in is very bright and moving it is problematic. I do not believe it is glowing. All the FETs are still open/off. Should I be concerned about the ticking noise?...Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
Each set of three caps is between 98V and 100V...Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
The model of the TV is HPS5073.
The board pictured that is mounted vertically is something of interest. I'm not sure what it does but I see a transformer on it. It is also on the same board with the FETs that are off. There is a component on the board that makes a faint snapping/clicking/popping sound about once every second....Last edited by pswayze; 04-21-2013, 04:10 PM.Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
I found a much better manual in your sig. I have verified that all voltages are correct on the SMPS output....Leave a comment:
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Re: Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn o
Vs is 198V....Leave a comment:
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Samsung Plasma S50HW-YB01 has sound but no picture. PSU OK but FETs don't turn on.
I've got a 50" Samsung plasma that has sound but no picture. The internal model number shows S50HW-YB01. I've been going through a service manual I found online. There are no fuses blown and all voltages on the power supply board are in spec. Now I'm at the step in the service manual where it has me test for blown FETs on the Y-MAIN board. The manual says a shorted FET will read 0 Volts across the terminals (duh), and anywhere from 0.3-0.9 Volts if it is working properly. I'm assuming that is the saturation voltage. The readings I get are about 90V across all the FETs which is telling me...
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