Samsung pn58b860 Clicking

[tom66]

Re: Samsung pn58b860 Clicking

It's the white one right next to it.

[awyatt2]

Re: Samsung pn58b860 Clicking

the round reddish orange is a zener diode, the fuse is the white rectangle next to it.

[ptheman12345]

Re: Samsung pn58b860 Clicking

ohhh, okay. Just measured the white one and i'm getting a reading of around 5.2V

[tom66]

Re: Samsung pn58b860 Clicking

Ok, so it uses 5.2V, that is still OK, 15V for the sustain board may come in on the main connector instead.

[tom66]

Re: Samsung pn58b860 Clicking

Regarding the clicking, does it just click two or three times, or does it continue to click when plugged in?

Have you owned the TV since new and if so did you turn off the "Samsung melody" which makes sound when the TV is turned on? If not, do you hear the start up tone?

[ptheman12345]

Re: Samsung pn58b860 Clicking

When I initially plug it in, the red standby led turns on. Once I press the power button on the tv, it goes into a cycle where it tries to turn on (clicks), but then turns off (clicks again). The cycle goes on forever unless I unplug it from the wall. As for the melody, the tv doesnt stay on long for it to sound.

[tom66]

Re: Samsung pn58b860 Clicking

Hmm, I did not realise this from the original post -- may have missed it. Does Vs drop out while it clicks? It could be the main board if it is doing that.

[ptheman12345]

Re: Samsung pn58b860 Clicking

The 2 green LED on the control, 1 on the Y main, and 1 on the X main all blink when it initially tries to start up if that matters.

[ptheman12345]

Re: Samsung pn58b860 Clicking

Does it matter where I measure the Vs at? I measured it where the Y main connects to the power supply. It would rise to around 202V when it first clicks on, but then drop when it clicks off

[tom66]

Re: Samsung pn58b860 Clicking

It doesn't matter on which board, they are both the same.

Does it ramp down slowly or very suddenly drop?

[ptheman12345]

Re: Samsung pn58b860 Clicking

It rises to 202V on the first click then drops to around 160V 4 seconds after the second click off

[tom66]

Re: Samsung pn58b860 Clicking

If a board were shorted I would expect a drop to 0V but since that's not the case, the fault is probably elsewhere.

On the power supply there should be a legend near the connector going to the main board. There should be a pin marked PSON. Do you see this?

[ptheman12345]

Re: Samsung pn58b860 Clicking

yes i see it

[tom66]

Re: Samsung pn58b860 Clicking

Can you test the voltage on the pin. Does it change when it clicks off.

[ptheman12345]

Re: Samsung pn58b860 Clicking

just tested it. The ps on goes to 3.12V when it clicks on, but then goes to 0V when it clicks off

[ptheman12345]

Re: Samsung pn58b860 Clicking

the ps on is on the second underlining row correct? i had to use a thin metal wire and poke it in to get a reading

[tom66]

Re: Samsung pn58b860 Clicking

Since it is going off when the TV goes off, this makes me suspect the main board instead. It's possible the control board doesn't have enough time to start up. Can you get hold of a 100~470 ohm resistor? It can be used to force on PSON, and then the test patterns can be enabled. This should help locate the fault...

[ptheman12345]

Re: Samsung pn58b860 Clicking

Scratch what I said previously. Those readings are wrong. The correct ps on reading is 3.21V when the tv set clicks off and 0.2V when it clicks on

[tom66]

Re: Samsung pn58b860 Clicking

OK, but 0.2V is still off for the PSU.

[ptheman12345]

Re: Samsung pn58b860 Clicking

do you suspect the power supply is causing it to fault?