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 !

Friday 5 April 2019

VIEWSONIC VA2012W - LCD MONITOR - HOW TO DISASSEMBLE

VIEWSONIC VA2012w - LCD MONITOR - HOW TO DISASSEMBLE

DISASSEMBLY
CLICK ON THE PICTURES TO MAGNIFY
The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit(IEC60950 or UL1950). Do not connect the CCFL to hazardous Voltage Circuit.
Panel Source Identify
(1) ID label - The panel code “Q” for QDI panel and “T” for Hannstar panel should be shown on the lower right side of ID label.
(2) UPC label - The panel code “Q” for QDI panel and “T” for Hannstar panel should be shown on the lower right side of UPC label.
(3) Main board - The panel code “Q” for F/W version sticker or silkscreen should show QDI panel and “T” for Hannstar panel on the main board.
The MB board is a two-layer, single-landed. 12V DC power from the power adapter enters the board through connector CN6. Other connectors on the board are for audio speaker and button board .The VGA cable is a signal cable that contains video signal, sync signal and DDC signal from PC VGA adapter. This system board consists of 4 functional areas: flat panel controller, flash ROM, power regulator and Audio amplifier.
Flat panel controller… NT68563HF (IC2)
The heart of the system board is the scalar chip of NT68563HF. The scaler is a highly integrated flat panel display controller that interfaces analog, digital, and video inputs. It combines a triple ADC, a DVI compliant TMDS receiver, a multi-color on screen display (OSD) controller and many other functions in a single chip. It provides user a simple, flexible and cost-effective solution for various flat panel display products. The NT68563HF operates at frequencies up to 205MHz (analog only), suitable for LCD monitor up to UXGA resolution. The NT68563HF also build-in noise reduction function to provide more stable video quality, spread spectrum to provide low EMI solution, sRGB for video color space convert, post pattern for manufacture test.