REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 16 February 2019

ACER AT4202P CHECKINGS AND MEASURE

ACER AT4202P CHECK AND MEASURE

CHECK AND MEASURE
Image Board
Test the power of each chip with a good quality digital multimeter, to ground impedance and earth.
POWER CHECK AND MEASURE
Supply with getting Red Arrow point A|B|C|D that identification come out for power, image of board with the interface among having picture, it corresponding power make direction method separately among following pictures.
[View images by Google Picassa-3]

  • In the following picture it is successively  1pin to 5pin of CN12 from left to right.  Among them, 1pin connects 6V & 3pin connect 12V, 2pin & 4pin connect power, 5pin is free.
                                                   This picture for SDI panel Power
In the following image, it is successively 1 to 11 pin of  CN-120 from left to right.  Among them, the second pin connects STB 5V and supplied the power of CPU U-38.  This voltage is directly provided  panel power board when turn on PDP.  This is the first reason for CPU normally working .  4pin is relay On signal output, 5pin connect D12V, 8&9pins connect 3.3V, 11pin connect D6V.  pin-1 is free, 3,6&7 pins are connected to ground. 
                                                            [SDI PANEL POWER]

In the following image, 1 to 7 pin of CN-123 from left to right, 1pin ACD signal output, 2pin Relay on signal output, 3pin connect STB 5V and this provide the power for CPU U38, this voltage is directly provided from panel power board when turn On PDP , and this is first reason for CPU normally working, 4pin connect to ground, 5pin connects to VS-ON signal output, 6pin connects 5V, 7pin is free.
                                                This picture is for LG Panel Power.

In the following image, 1 to 7 pin of CN-122 from left to right, 1&2 pin connects to 9VSC, 3,7,8&9 pins connects to ground, 4,5&6 pins connects to 5VSC Power.
                                                This is the picture for LG panel Power.