REPAIRING AND NOT THROWING AWAY

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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 !

Wednesday, 20 March 2019

KONKA KLC -1521QS - SERVICE MODE & ADJUSTMENTS

KONKA KLC -1521QS - SERVICE MODE & ADJUSTMENTS

TO ENTER FACTORY MODE
  • Using the remote control, press Menu button once first , then press RECALL button five times, and you can see manufacture menu on the LCD panel.
  • Press the PROG ▲/▼ button to selection the sub menu of factory menu (including F,E,UOCIII,Temp) and press the VOL ► to enter the sub menu and setting the value.
  • Press the MUTE button again and again or turn off the TV, it can exit the factory menu.
AGC ADJUSTMENT
  •  In TV mode, receive 60dB split field signal.Enter factory mode menu “UOCIII” item, press PROG ▲/▼ to select “RF AGC”, then use VOL◄/►to adjust the item until the voltage of Pin 1 of N100 to be about 2.5V±0.2V, then noise wave of the picture point disappears.
WHITE BALANCE ADJUSTMENT
  • Receive black or white signal under AV or PC mode, adjusting brightness and contrast to set the brightness to 15Nit in dark area and 90 Nit in bright area 4.5.2 Adjust white balance. 
  • Press MENU button once, then press RECALL button five times to enter factory menu, select “Temp” Menu.
Adjust
Red 0-100
Green    0-100
Blue    0-100
Adjusting chromaticity coordinates of black and white to fit the requirement, or plug automatic calibration system to adjust white calibration automatically.
TROUBLESHOOT
  • Verify the state of TV set. Switch the TV on ,then verify the LED color. Red is standby state and green is working state.
  • Checking Supply Power. If the color of LED is yellow, the power supply for signal board, N801 supply 5V and N802 supply 3.3V,N804、N806 supply 3.3V power (Test the PIN 2).N805 supply 2.5V(Test the PIN 2),D803 supply 8.3V,V401 and V402 supply 1.8V. All these are on main IC N401,N501.
  • After turning on the power, if blank screen appears (no back light lamp), just press POWER button several times, if blank screen still there. Check if the voltage of every power supply is normal.
  • Check if the crystal oscillator X501(14.318180MHz) X401(24.576MHz) oscillate or not, and oscillate frequency is right or not.
  • Back light control signal (BKLON) of XS801 has high level (about 2.5V) or not. If not, check whether fault soldered or short circuit happened, 6) If back light lamp is on while there is no display, check N407 and N501’s reset circuit and the output of the oscillator to confirm the CPU and SCALER are working or not. If RGB is abnormal, check N501;If RGB is working correctly and the other channel is abnormal, check N501.
Posted By: FRANK at 03:50
TAG: , ,