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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday 8 March 2019

VIEWSONIC N1900W-1E SERVICE MODE FIRMWARE UPDATE AND POWER SUPPLY CIRCUIT

VIEWSONIC N1900W-1E Service mode firmware update and power supply circuit


Contents of this article 

  • How to enter Service mode (Factory adjustment mode)
  • How to Initializing the EEPROM
  • How to update the  Firmware 
  • Power supply circuit ( smps )


VIEWSONIC N1900W-1E  SERVICE MODE FIRMWARE UPDATE AND POWER SUPPLY CIRCUIT 

ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory.
3. ESD protection is needed before adjustment.
2. MAIN ADJUSTMENTS
NO. FUNCTION DESIGNATION
1. PC AUTO COLOR Function Key
2. Adjust color temperature Function Key
3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(A). Power supply voltage:
AC 220/240V± 10% 50 Hz ± 5%.
(B). Warm up time:
The display must be power ON for at least 30 minutes at full white pattern before starting alignments.
This is especially critical in color temperature and white balance adjustments.
(C). Video : reference the front detail specifications.
I. EEPROM INIT (Factory mode )
(A). Power OFF(LED Orange), then Press “UP”+“ENTER” and “POWER” key, When Power on , Press “MENU” key go to factory mode.

B). Press “ ENTER” key to do EEPROM INIT.
C).When EEPROM INIT finish the above information OSD will disappear.
II. PC AUTO COLOR:
A) Move the color bar to “WHITE BALANCE”, then press “ ENTER” key to Adjust color temperature Set at PC Souce timing set at 1440x900 60HZ
Use Chroma 2327 pattern Generator PATTEN use 5 block

B).When the Adjust color temperature finish, the OSD will move to “OFFSET” automatic.
Then check color temperature value:
X=0.313±0.03
Y=0.329±0.03
Y=230(min)
Preset (6500K)
Press “ MENU” key to exit .
Press “ POWER” key quit factory mode
4. Firmware Upgrade Procedure
When you receive the returned LCD TV, please check whether the firmware version is the latest. If not, please do the following procedures to upgrade it to the latest version.
1. Prepare N1900W(E) ISP Board in hand first.

2. Plug in the ISP Board into your PC Printer Port, then switch the PC on to stand by.

Install Printer Port Driver, and then install Setup_LptDrv_v020201_XP_2000. After installation is completed, make sure you restart the PC.

3. Light up the LCD TV monitor, and then plug the 4Pin female component into the 4Pin male component under the rear cover of the LCD TV. (Note that the LCD TV monitor must be lighted on now)

4. Run the .exe file under the path of C:\Program\Micronas\LptDrv\LptDrvTest from your PC. If the following screen appears, then the ISP Printer Port Device is functioning normally.

5. Install ISP I2C Driver, and then install the installation program of
Setup_Visual_i2c_v3-2-3b8h.exe. After installation is completed, you can see the .exe file under Windows O.S.C::\program\micronas\visual I2C program.
6. After the ISP I2C is installed, you can run the C:\VCTI\vct49xyi_start.vi2c.exe program under VCTI menu.
7. When the above screen shows, the TVT Item is running, and the following screen will appear.

8. When the above picture appears, click on the Bootloader Item with your mouse cursor, and the following screen will appear. Keep running the Bootloader Item until the LCD TV screen disappears all at once, and then you can enter ISP Mode.
9. Run Bootloader Version again. Press the Enter key continuously, and the Version 22 screen will appear.
10. Run the Erase Flash commander again, and run the Load Bin->Flash commander, and then choose the location of Load Bin File as follows.
11. When the following screen appears, the program is being burend-in (about 2.5 min), and the program is updated.
When you receive the returned monitor, please check whether the firmware version is the latest. If not, please do the following procedures to upgrade it to the latest version.

POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN
Posted By: FRANK at 01:05
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