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

SHARP LC-42LE620UT - LC-46LE620UT -LC-55LE620UT SERVICE MODE

SHARP LC-42LE620UT - LC-46LE620UT -LC-55LE620UT SERVICE MODE





SERVICE MODE
Enter factory mode menu: press MENU + Numeric keys “1999” to enter factory mode.



Display adjustment
White Balance adjustment
Only adjust YPbPr Mode and copy to all of input source
General set-up :
Equipment Requirements: Minolta CA-210 or Equivalent Color analyzer
Astor Pattern Generator VG-848 , VG-859 or equivalent instrument.
An internal full white pattern is available in the MT5392 platform, you can use the internal pattern to replace Astor Pattern Generator VG-848.

Input requirements:
Input Signal Type : YPbPr signal
1. 1080i mode, RGB Full white by VG-848 , VG-859 or internal full white pattern.
2. Select Picture mode to Standard mode and check the x, y data.
Input Signal Strength : 1 Vpp for Y signal
If use internal pattern, send UART command: /n/ycproc/scepat 1 818 (80% white).
If use internal pattern, send UART command: /n/ycproc/scepat 1 204 (20% white).

Input Injection Point : YPbPr (RAC jack)

Alignment method:
Initial Set-up:
1. Select source as “INPUT 2 ” (Component 1).
2. Set Smart Picture mode as “Standard”.
3. Apply “RGB Full white” pattern by signal generator or internal full white pattern.
4. Enter factory mode menu: press MENU + Numeric keys “1999” .
Alignment:
1. At FAC mode menu, select ”19. Color temp” item and change to “Cool”
2. Apply RGB Full white pattern and change signal level to 204 (80% white pattern). If use internal pattern, set level to 818 (80% white pattern).
3. Adjust the 20. Scaler R GAIN, 22. Scaler B GAIN values to meet “Cool” color coordinates specification below. (Please keep
21. Scaler G GAIN at 0)
4. Apply RGB Full white pattern and change signal level to 48 (20% white pattern) If use internal pattern, set level to 204 (20% white pattern).
5. Adjust the 23. Scaler R Offset, 25.Scaler B Offset values to meet “Cool” color coordinates specification below. (Please keep
24.Scaler G Offset at 0)
6. Repeat step 2, 3, 4, 5, twice to meet “Cool” color coordinates specification below.
7. Select ”26. Clr temp Copy” item and perss RC “ >”. The Cool adjust value will copy to all of input source automaticly.

8. Select ”19. Color temp” item and change to “Normal”.
9. Apply RGB Full white pattern and change signal level to 204 (80% white pattern).
If use internal pattern, set level to 818 (80% white pattern).
10. Adjust the 20. Scaler R GAIN, 22. Scaler B GAIN values to meet “Normal” color coordinates specification below. (Please
keep 21. Scaler G GAIN at 0)
11. Apply RGB Full white pattern and change signal level to 48 (20% white pattern)
If use internal pattern, set level to 204 (20% white pattern).
12. Adjust the 23. Scaler R Offset, 25.Scaler B Offset values to meet “Normal” color coordinates specification below. (Please
keep 24.Scaler G Offset at 0)
13. Repeat step 9, 10, 11, 12, twice to meet “Normal” color coordinates specification below.
14. Select ”26. Clr temp Copy” item and perss RC “ >”. The Normal adjust value will copy to all of input source automaticly.
15. Select ”19. Color temp” item and change to “Warm”.
16. Apply RGB Full white pattern and change signal level to 204 (80% white pattern).

If use internal pattern, set level to 818 (80% white pattern).
17. Adjust the 20. Scaler R GAIN, 22. Scaler B GAIN values to meet “Warm” color coordinates specification below. (Please
keep 21. Scaler G GAIN at 0)
18. Apply RGB Full white pattern and change signal level to 48 (20% white pattern)
If use internal pattern, set level to 204 (20% white pattern).
19. Adjust the 23. Scaler R Offset, 25.Scaler B Offset values to meet “Warm” color coordinates specification below. (Please
keep 24.Scaler G Offset at 0)
20. Repeat step 16, 17, 18, 19, twice to meet “Warml” color coordinates specification below.
21. Select ”26. Clr temp Copy” item and perss RC “ >”. The warm adjust value will copy to all of input source automatically.
22. Select ”19. Color temp” item and change to “User”.
23. Copy “Normal” adjust value to 20. Scaler R GAIN, 22. Scaler B GAIN, 23. Scaler R Offset, 25.Scaler B Offset.
24. Select ”26. Clr temp Copy” item and perss RC “ >”. The User adjust value will copy to all of input source automatically.

Note:
1. Use Minolta CA-210 for color coordinates and luminance check.
2. Before adjusting,all colour analyzers (CA-210) should be coordinates with a same reference TV set.
3. Luminance > 320 cd/m2 in the center of the screen when Brightness control at 100; Contrast control at 100

POWER SUPPLY CIRCUIT 

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