Westinghouse lvm 42w2

[testas86]

Re: Westinghouse lvm 42w2

Here are as many answers to plain bills questions as i can answer right now ( i need to go to my friends house where the rest of the tv is located)

when i turn on the tv all i get is the westinghouse light onthe bottom to turn on, i can not select anything else or change anything cus nothing else has power, with the flashlight i see nothing on the screen i dont hear anything over the speakers as well.

the caps are nichicon(brown), rubycon(black)

and attached are the side pics of the caps as best as i could take them

[PlainBill]

Re: Westinghouse lvm 42w2

Here are as many answers to plain bills questions as i can answer right now ( i need to go to my friends house where the rest of the tv is located)

when i turn on the tv all i get is the westinghouse light onthe bottom to turn on, i can not select anything else or change anything cus nothing else has power, with the flashlight i see nothing on the screen i dont hear anything over the speakers as well.

the caps are nichicon(brown), rubycon(black)

and attached are the side pics of the caps as best as i could take them

The pictures are good enough to show there is no bulging. That is a good sign.

PlainBill

[testas86]

Re: Westinghouse lvm 42w2

here is a pic of the logic board for the power supply with the reading i got.


i tested it a second time and i got on CN203 5th pin for the bottom a reading of .75 but drained down to 0 and 4th pin .15 and drained to 0 and 3rd pin .9 but drained to 0

and on cn204 the first 5 pins from the top .01v constant

[PlainBill]

Re: Westinghouse lvm 42w2

here is a pic of the logic board for the power supply with the reading i got.


i tested it a second time and i got on CN203 5th pin for the bottom a reading of .75 but drained down to 0 and 4th pin .15 and drained to 0 and 3rd pin .9 but drained to 0

and on cn204 the first 5 pins from the top .01v constant

That sounds like the power supply may be starting. Does the voltage at the top pin of CN203 (PSON) stay at 5V?

PlainBill

[testas86]

Re: Westinghouse lvm 42w2

yes its a constant 5v

[PlainBill]

Re: Westinghouse lvm 42w2

yes its a constant 5v

OK, that means the main board is not detecting a fault and shutting the power supply down. The problem is either a short on an output (either in the power supply or on one of the other boards), or a problem with the power supply itself. As a first test, hook one end of a 1K resistor to the PSON pin and the other end of the resistor to the 5VSB pin. If the power supply does not come up there is definitely a problem with the power supply.

PlainBill

[testas86]

Re: Westinghouse lvm 42w2

also when we were testing the voltages we didnt try to power on the unit we just had the power plugged in. Is that correct or should we have tried to power on unit?

[PlainBill]

Re: Westinghouse lvm 42w2

also when we were testing the voltages we didnt try to power on the unit we just had the power plugged in. Is that correct or should we have tried to power on unit?

Try to power the unit on. Look for changes in the output voltage and the PSON line.

PlainBill