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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Monday 11 March 2019

EMERSON LD195EM8 SERVICE MODE AND POWER SUPPLY CIRCUIT BOARD

EMERSON LD195EM8 SERVICE MODE AND POWER SUPPLY CIRCUIT BOARD

 
How to set up the service mode:
Service mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit as shown in Fig. 1.

Auto Calibration [Component]
Purpose: To bring the color adjustment of each component into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, component signals do not reproduce the corresponding color.
1. Input 1080i 100% Color Bar signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
4. To start auto adjustment, press [1] button on the service remote control unit.
- In the auto adjustment mode, “Please wait” appears on the screen.
- Upon completion, “OK” appears on the screen.
Auto Calibration [DTV]
Purpose: To bring the color adjustment of DTV into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, DTV signals do not reproduce the corresponding color.
1. Enter the service mode.
2. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
3. To start auto adjustment, press [2] button on the service remote control unit.
- In the auto adjustment mode, “Please wait” appears on the screen.
- Upon completion, “OK” appears on the screen.
Auto Calibration [PC]
Purpose: To bring the color adjustment of PC into standard alignment.
Symptom of Misadjustment: If this adjustment is incorrect, PC signals do not reproduce the corresponding color.
1. Input XGA 100% White signal.
2. Enter the service mode.
3. To enter the Auto Calibration adjustment mode, press [6] button on the service remote control unit.
4. To start auto adjustment, press [3] button on the service remote control unit.
- In the auto adjustment mode, “Please wait” appears on the screen.
- Upon completion, “OK” appears on the screen.
The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation. White Balance Adjustment
[Video]
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 23%=23IRE).
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL. DOWN] button on the service remote control unit and select “C/D1” mode.
5. [CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.
6. In each color mode, press [CH. UP / DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 11000°K (x= 0.279 / y= 0.272 ±0.005).
INITIALIZE THE LCD TV/DVD

To put the program back at the factory-default, initialize the LCD TV/DVD using the following procedure.
DVD Section 
1. Press [1], [2], [3], [4], and [DISPLAY] buttons on the remote control unit in that order.
2. Press [CLEAR] button on the remote control unit. When “OK” appears on the screen, the factory default will be set.
3. To exit this mode, press [CH. UP / DOWN]
 LCD TV Section 
1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit.
- To cancel the service mode, press [POWER] button on the service remote control unit.
3. Press [DISPLAY] button on the service remote control unit to initialize the LCD television.
4. "FF" will appear in the upper left of the screen. "FF" color will change to red from white when initialzing is complete.] button to go to TV mode, or press [POWER] button to turn the power off.
POWER SUPPLY SCHEMATIC  Power Supply board 
CLICK ON THE IMAGE TO ZOOM IN
Posted By: FRANK at 03:26
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