Re: Samsung 42" plasma fault
Thank you for clearing that up. The pins are as follows:
Fan On (0V)- NC
D13v(.3v) - D13v(.3v)
D13v(.3v) - RTN
RTN - RTN
5.3 (0v) - 5.3 (0v)
5.3 (0v) - 5.3 (0v)
RTN - RTN
RTN - RTN
13 VAMP (.3V) - 13 VAMP (.3V)
RTN - RTN
STDBY (5V) - RTN
PSON (4.1V) - NC
the79bomb
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Last Activity: 04-12-2012, 09:24 AM
Joined: 12-27-2011
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Re: Samsung 42" plasma fault
There are no pins on the power board. It seems to me that there is some overload in the main board causing power to shut off after 1 second. I was unable to find any jumper pins on the main board either. The main logic has 4 but there is no jumper present but it cannot be the source of the problem as it is unplugged.Last edited by the79bomb; 01-02-2012, 12:01 PM.Leave a comment:
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Re: Samsung 42" plasma fault
there is no picture but the power still clicks off after 1 secondLeave a comment:
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Re: Samsung 42" plasma fault
The standby pin has 5 volts and the 5.3 do indeed have 5.3 volts for a second. My volt meter takes a second to get the reading so it was hard to get a stable reading but it is 5.3 volts.Leave a comment:
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Re: Samsung 42" plasma fault
I read 5v but now I'll double check it and let you know.Leave a comment:
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Re: Samsung 42" plasma fault
my camera will not focus closer. no macro mode on my camera for taking close up shots. The codes on the connectors are as follows from left to right:
stby,vs-on,n c,ps-on,rtn,5. 3v, rtn, rtn,5.3v,5.3v
all "5.3v" pins have 5v for the 1 second but then 0 after the relay clicks off. "Stby" has 5v throughout. However ps-on has 0v with relay closed and then 3.3 when it clicks open. This is with the connector unplugged as pictured meaning that something on the main board is causing the relay to open as it is the...Last edited by the79bomb; 12-28-2011, 12:24 PM.Leave a comment:
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Re: Samsung 42" plasma fault
Thanks for the response. I have attached a better picture of the connector to the main logic board from the power supply as well as a clearer picture of the overall system with enough res to zoom in. I have tried starting the system with virtually every combination of power cables plugged in/unplugged with no change - system clicks off after 1 second unless the main board is unplugged in which case nothing.
Thanks, Tim...Leave a comment:
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Re: Samsung 42" plasma fault
Thanks for the reply. I have tried unplugging each board. both x & y mains as well and the problem remains. the only change is when I unplug the main board and then nothing happens. I just hate to pay for a main board and have that not be the problem or not be the only problem. That is why I wanted to be sure.
Thanks, TimLeave a comment:
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Samsung 42" plasma fault
I have model pn42a400c2dxza
It comes on for just over a second and the relay cuts off power (Still have 5v on standby pin). For that 1 second the screen looks off (see screenshot)
Unplugging the power cable to all of the boards has no effect except when unplugging the board with a/v inputs (main board) in which case it does not turn on at all.
It appears there is an overload somewhere. The cable from the central board to the board with the a/v inputs (main board) was damaged when I got the unit so some of the pins might have shorted. I have repaired...Last edited by the79bomb; 12-27-2011, 05:58 PM.
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