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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday, 5 February 2019

DAEWOO DTH14 – DTH20 – DTH21 – CRT TV – [PAL/NTSC] - SERVICE MODE – CIRCUIT DIAGRAM (SCHEMATIC)

Daewoo DTH14 – DTH20 – DTH21 – CRT TV – [PAL/NTSC] - Service mode – circuit diagram (Schematic)

Used ICs: TDA7056A (Audio Amplifier) –LA7841 (Vertical scan output) – 2SK2671 (SMPS switching output FET) – DPM001T1 (SMPS control) – DW8632CM1 (Microprocessor) – 24LC04B (Memory) – DCT812 (NT/PAL Chroma Jungle) - Daewoo DTH-14V1FS, DTH-20V1FS, DTH-21V1FS, DTH-14V3FS, DTH-20V3FS, DTH-21V3FS, DTH-14V4FS, DTH-20V4FS, DTH-21V4FS.
Service Mode
* Turn the set on.
* Direct the remote control to the reception window of TV.
* Push buttons of remote control in sequence as follows.
       1 => MUTE => DISPLAY => MUTE
The service mode screen will appear.
* Using the channel up or channel down button, select the item you wish to adjust.  (The color of selected item turns into the red.)
* Press the volume up or down button to enter in the service mode you wish to adjust.
* Press DISPLAY button the state which the screen is displaying each of service menus after all adjustments are completed each of all service menu.
SCREEN ADJUSTMENT (S2)
Enter the service mode and select service adjustment S2.
Adjust the Screen Control Volume (located on FBT) so that the horizontal line onscreen may be disappeared.
Press the volume up or down button to exit in the screen adjustment mode.
Power supply Circuit diagram (SMPS Split)
Full schematic
Click on the pictures to magnify
Posted By: FRANK at 03:51
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