Re: view sonic VS11838-1M channel up running continuiously
Oh, and also, your TV probably has a main board, responsible for creating your picture and all the other logic, a power board that provides power, a TCON that controls timing of the screen, and than probably driver boards (usually long ones, on side or top/bottom) that split the power from the supply across all of the rows and columns, and controls the individual pixels. These driver boards are a bit complicated in that the screen has so many connections for the individual pixels, it is impossible to hook them all to one...
BangBusDriver
Maker and Fixer
Last Activity: 10-09-2021, 10:54 AM
Joined: 03-14-2017
Location: Chicago, illinois
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Re: view sonic VS11838-1M channel up running continuiously
Just to give a through understanding of how these buttons/Remote Control sensor should work, the buttons are just switches. Pretty simple. They have a positive and a negative side. Although I can't tell you exactly what they connect to, eventually, the voltage that passes when you press the button is read by as input by something ,and eventually is turned into digital logic used to change the channel output.
The IR sensor (If you don't have a radio remote or some other tech, but I assume IR since it is an old TV) usually...Leave a comment:
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Re: view sonic VS11838-1M channel up running continuiously
What you really need to do is find a schematic so that you know what are poking around at. Sometimes they even give correct voltage readings for components.
You might find one in the TV's service manual, or you could look it up by the part numbers on the boards. Each board should have a different part number and it should be pretty obvious when you examine them.Leave a comment:
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Re: view sonic VS11838-1M channel up running continuiously
I would check for shorts to power/ground on the circuits that lead to the buttons, or on the IC that the buttons likely act as an input for.
I suspect they will lead to the TV's main micro controller, but I could be wrong. I also hypothesize that you could have a problem in the IR sensor circuit causing it to get false readings, might want to check there too.
This is more likely a problem with related to digital or analog logic than your power rails. Also keep in mind that when measuring the voltage on the...Leave a comment:
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Re: A question about false continuity.
So based on your feedback, I have another question. The caps that can be found on the underside of a processor socket... are those all connected to the processors 1.5-1.8 volt rail, typically? I thought perhaps some of them were used to pass signal voltage and block power, maybe?
Also to clear things up, when measuring for continuity ACROSS the caps from the positive side to the negative side (which I assume should just be ground if they are used to keep the power rails steady at load), and getting continuity, as if they were...Leave a comment:
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A question about false continuity.
Here I post a question to which Google has failed me utterly.
I am currently troubleshooting a motherboard and in the CPU vcore area, ALL of the caps seem to have continuity. And a few others on a certain power rail.
They all have about 8ohms resistance. Is this a problem or normal?
My hypothesis is that the caps may be charged on both sides or otherwise meant to pass high mhz ac current from the CPU?
Please, any help is appreciated. I'm a relative beginner at electronics. -
Re: Asus R505CB (K56CM motherboard) backlight problem
I just received one of these boards for repair.
Has no power, allegedly, but on close inspection of the LVDS connector I noticed that the right side of the connector, looking with pin 1 on facing towards me, seems to have melted. I haven't plugged it in yet, but I'm hoping I did not get ripped off.
I digress, I'm also measuring continuity and low resistance both ways across a lot of the diodes on this board.
I will post my results in this thread for those of you whom are interested.Leave a comment:
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Re: Philips 32pfl3403d/27 no power
To clarify this fuse mess, a fuse is essentially just a wire, it should have extremely low resistance and voltage drop across it.
If your multimeter in resistance/continuity/diode mode reads OL with the probes on either side, that means it is blown. Otherwise it is good.Leave a comment:
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Re: Asus motherboard K53SV schematic
I am about to come into possession of a dead board of this model and will post my findings here for all.
I have already downloaded the boardview from another thread on the forum and the repair guide posted here and am optimistic about the repair
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Re: New Members - please post your introductions here
Hello, I'm new here and hope to have an enjoyable stay with you all.
I've worked in a repair shop for a few months now and am looking to gain more knowledge on component level repairs, particularly for laptops and phones. This forum has quite the reputation and I hope to learn a lot from you all.
To date, I have successfully repaired one board and troubleshooted another. A zener, in the former case (Replaced with a regular diode of unknown rating, no schematic, diode was destroyed :/); two power...Leave a comment:
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