Re: Samsung PN42A450P1D Plasma screen doesn't prime
VSCAN to gnd= -189.7
VSCH to gnd=-48.3
VSCAN to VSCH=141.4
Fwrothy
Senior Member
Last Activity: 02-21-2016, 12:32 PM
Joined: 02-25-2014
Location: Caledon Ontario
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Ok so totally disregard #19and. Moving on..
I pulled of the bezel to check the panel for damage; nothing visible.
The fuse under the heatsink it is near the 3 big capacitors, is that part of the ERC circuit?
If so the voltage is ok right?
Another thing, what is the difference between Vsch and Vscan?Leave a comment:
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Re: Tc-42px14
I realized that english was not your first language early on, no problem I will try to be clear
Since I am not familiar with the set, a good clear photo of the whole back of the TV ( showing all boards) would be good.
Do you have a multimeter? Next you should check the Vsus and Ve voltages at the P board. The values are on the panel sticker.
These are high voltages so you need to be careful.Leave a comment:
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Re: Tc-42px14
Does it 'flash' briefly when you first turn it on?Leave a comment:
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Re: Tc-42px14
I think we are starting to go in circles here...
I am just a novice at this but I'm trying to help you gather some information so maybe someone can help you.
Maybe I am not asking the right or most relevant questions but by you not answering them we are getting nowhere....Leave a comment:
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Re: Tc-42px14
Ok can you describe what the set does when you plug it in and turn it on-with everything reconnected?
I think we have deterimined that you have a solid red led, right?
Does the screen come on briefly or at all?Leave a comment:
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Re: Vizio VT470M, no display, components seem OK
The first step: [url]https://www.badcaps.net/forum/showthread.php?t=39740[/url]Re: Vizio VT470M, no display, compon...?t=39740[/url]Leave a comment:
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Re: Tc-42px14
Neither am I, if you were to disconnect C1, that is exactly what you would expect to see, I believe.
Here is the service manual:Leave a comment:
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Re: Tc-42px14
So with c1 connected you have no picture?...Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Ok I found the GREEN FUSES F5002 top right quadrant of Y-main, 15vdc.
F5007 is in the bottom right quadrant under the heat sink, 92vdc.
Both measurement use chassis ground.Leave a comment:
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Re: Tc-42px14
Ok so the reason I asked was I just worked on a TC-p42x3, I spotted your panel sticker and see its a different panel(2009) and the boards are different but perhaps I could apply what i learned to help you since the locked red led seems key.
Basically we started with the set powered of and unplugged, by disconnecting the cable from p board to sn and checking sn for short.Leave a comment:
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Re: Tc-42px14
Excuse me in advance for asking but...Is this model # correct?Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Rl1 is ~26vdc
Rl2 is ~35vdc
10x probe is my only probe at this point and I don't have much practical experience.Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
So I should have 5 & 15vdc at the exposed legs?...Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
I do! Picked up a tek2465 last spring but have not used it yet, been looking for an isolation trans...
Fl1&2 on Y-main, are those fuses?...Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
boards:...Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
I only found the one fuse on the ymain...Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Yup as per# 3&5Leave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Tried the self test-nadaLeave a comment:
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Re: Samsung PN42A450P1D Plasma screen doesn't prime
Yup Vscan(Vsc on panel sticker),Ve, Va and Vs are all spot on....Leave a comment:
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