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.

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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 !

Tuesday 19 February 2019

VIEWSONIC N4261W-1M 42 INCH LCD TV - FIRMWARE UPDATE

VIEWSONIC N4261W-1M 42 inch LCD TV - FIRMWARE UPDATE

OPERATION OF RS232 WRITING
  • RS-232 mounted one the main board is the main interface writing new firmware.  Can update new firmware to U40 by RS-232.
  • Writing firmware needs;

  1. RS-232 interface built in PC.
  2. RS232 cable.
  3. Pixelworks Flash Upgrade software.
  4. Connect RS232 interfaces between PC and TV set.
FIRMWARE WRITING PROCEDURE
  • Execute Pixelworks Flash Upgrader software.
  • Select Baud rate by 115200.
  • Download "appcode.crams" file.
  • Choose "Flash" Mode entering standby status for writing firmware.
  • Turn ON the TV set.
  • "Bytes Bar" will appear on the screen in few seconds indicating firmware is downloding.
  • The download process will take about4 minutes.  It won't change the original code when download process intercepted.  Once download process finished, system have to take at least 30 seconds updating new firmware.  Make sure power is supplied without interruption; otherwise the system will shut down.
  • System will restart automatically after finishing writing process.
FUNCTION TEST
Check item
Describe
POWER
PRESS [POWER] TO TURN ON OF OFF LCD TV.
REMOTE CONTROL EFFECTIVE RANGE
THE EFFECTVIE RANGE IS 5 MENTER FROM LCD SENSOR.
INDICATOR LED
TURN ON:  GREEN LIGHT.
TURN OFF: RED LIGHT DPMS STATE FOR PC/HDMI MODE : RED LIGHT.
EARPHONE
PLUG IN THE EARPHONE, CHECK THE SPEAKERS IS MUTE.
PLUG IN THE EARPHONE, CHECK THE EARPHONE WORKING.
PLUG IN THE EARPHONE.  ADJUST THE VOLUME AND MAKE SURE THE VOLUME OF EARPHONE FOLLOW THE ADJUSTING.
MENU
PRESS ‘MENU’ KEY TO MAKE SURE THE OSD PICTURE WILL SHOW OUT.
CHANNEL
PRESS ‘CHANNEL’ UP/DN TO CHECK THE CHANNEL NUMBER CHANGE NORMALLY.
PRESS ‘RECALL’ TO CHECK SWITCHING PREVIOUSLY VIEWED CHANNEL NORMALLY.
PRESS NUMBER KEY AND [-/100] TO ENTER THE CHANNEL NUMBER.
VOLUME
PRESS ‘+’ / ‘-‘ TO CHECK THE VOLUME INCREASES OR DECREASES.
SOURCE
PRESS ‘SOURCE’ KEY AND CHECK EACH SIGNAL SOURCE IS NORMALLY.  PRESS HDMI | PC } S-VIDEO | AV | COMPONENT | TO ENTER HDMI, PC, S-VIDEO, AV, COMPONENT MODE.
SCREEN
PRESS ‘WIDE’ WILL SWITCHES IN SEVERAL SCREEN MODE  : AUTO, 4:3, 16:9, 14:9.
PRESS ‘DISPLAY’ WILL SHOW THE INPUT SIGNAL SOURCE.
AUDIO
PRESS ‘MUTE’ TO DISABLE AUDIO.
PRESS ‘MTS/SAP’ TO SWITCH SAP, MONO, STEREO MODE.
Posted By: FRANK at 05:44
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