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 12 October 2020

DAEWOO DTD 21H9 AND DTD 14H9 COLOUR TV HOW TO ENTER THE SERVICE MODE CHASSIS CP 093 -- FULL SCHEMATIC

  MICROCONTROLLER CONFIGURATION - SERVICE MODE

1 Select PR. number 91

2  Adjust sharpness to minimum and exit all menus.

3 Within 2 seconds press the key sequence : RED - GREEN – menu.

The software version is displayed beside the word Service, e.g. “SERVICE VER 00.05”.

To exit SERVICE menu press menu key or Std By key.

SERVICE MODE NAVIGATION

PR Up/Down remote keys :    Cycle through the service items available.

Vol -/+ remote keys :    Dec/Increment the values within range – Cycle trough option bits.

OK key :    Toggle bits in option byte.



MICROCONTROLLER CONFIGURATION: OPTION BITS

There are two option bytes available (16 bits in all). These option bits are available from Service mode. 

First find the OPTION1 or OPTION2 control, and then use the Volume PLUS/MINUS buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table below shows the two option bytes available;

NVM default setting

The purpose of this message, when you change a virgin EEPROM, is to allow to modify the NVM DATA to desired values.

1 Introduction:

The NVM default values are fixed for the user, but for flexibility in service, these data are stored in NVM and can be changed when the TV set is in a special mode call "NVM EDITOR". This mode can only be access from "FACTORY" mode.

2 Entering into "FACTORY" mode.

To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC” key. The factory menu will appear on the screen, showing “FACTORY” , plus other relevant information like software version and date.

WARNING: When in "FACTORY" mode you should not press any key other than the keys described in the procedure below. Unwanted key stroke could misadjust the TV set.

3  Entering into "NVM EDITOR" mode.

To switch the TV set into NVM EDITOR mode, use the user remote control, and press on “ON/ENTER” key. The NVM EDITOR window will appear on the screen. This mode allow you to access all data stored in NVM. The current NVM address is given in column "ADDR." in both

Decimal and Hexadecimal format. The column DATA gives the value contained at selected address in both Decimal and Hexadecimal format.

4 Navigation in "NVM EDITOR" mode.

Use Program Up/Dwn keys to select the desired address. Use Volume Up/Down keys to change the data at selected address. You must press " OK/ENTER" key to store value after modification.

The data can be adjusted between 0 and 63.

5 Exit "NVM EDITOR" mode.

To switch the TV set back into FACTORY mode, use the user remote control, and press on “MENU” key.

The factory menu will appear on the screen, showing “FACTORY”.

6 Exit "FACTORY" mode.

To exit "FACTORY" mode, use the factory remote control, and press on “SVC” key.

The factory menu will disappear from the screen.

NVM DATA CHANGE LIST

The UOCIII series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded TEXT/Control/Graphics m-Controller (TCG m-Controller) and US Closed Caption decoder. In addition the following functions can be added:

Adaptive digital (4H/2H) PAL/NTSC combfilter

Teletext decoder with 10 page text memory

Multi-standard stereo decoder

BTSC stereo decoder

Digital sound processing circuit 

Digital video processing circuit

PWB Component and print sides

Circuit diagram:  CP093 AND CP093F