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, 4 February 2019

TOSHIBA 20AR22 - 20AR32 CRT TV - HOW TO ENTER SERVICE MODE – ADJUSTMENTS - CIRCUIT DIAGRAM

Toshiba 20AR22 - 20AR32 CRT TV - How to enter service mode – adjustments - circuit diagram

There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required.
Before putting unit into the service mode, check that customer adjustments are in the normal mode. Use the reset function in the video adjustment menu to ensure customer controls are in their proper (reset) position.
Once in the service mode, press the Ch-up or Ch-down button on the remote controller or at the set. The service adjustment item will vary in increments of one. Select the item you wish to adjust.
Press the Vol-up or down button to adjust the data number.
To enter the service mode and exit service mode.
Short JA137 & JA138 for 1 Second and release to switch to the service mode position, and the microprocessor is in input mode.(Adjustment through the I2C bus control.)
To exit the service mode, turn the television off by pressing the power button.



Service mode adjustments



1 Press the CH DOWN/UP key on the remote controller to get ready to select the mode one by one.
2 Press the CH DOWN/UP key on the remote controller to select the modes reversibly one by one.
3 Using the VOLUME UP/DOWN key on the remote controller, the data can be modified.
(OSD disturbance can be erased by R/C display key)


Holding down to short JA137 & JA138 and turn on the main power SW will automatically write the initial values into IC1003.

This is only can done when a new EEPROM is used.
Schematic (Circuit diagram)



Click on the pictures to magnify