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 !

Thursday, 7 February 2019

SAMSUNG TXM2756X - HOW TO ENTER SERVICE MODE – SMPS-DEFLECTION – SYSTEM-CHROMA AND AUDIO SECTION CIRCUIT DIAGRAM

Samsung TXM2756X - How to enter Service Mode – SMPS-Deflection – System-Chroma and Audio section circuit diagram

Applicable to Samsung TXM2756X/XAA TXM2556X/XAA - CT29F6SWX/XAO CT26F6SWX/XAO - CT29F6SWX/XAP CT26F6SWX/XAP
Samsung 25, 27, and 29 Inch CRT TV – How to enter Service Mode – SMPS-Deflection – System-Chroma and Audio section circuit diagram.
Factory Mode
Do not attempt these adjustments in the Video Mode.
The Factory Mode adjustments are necessary when either the EEPROM (IC902) or the CRT is replaced.
Do not tamper with the “Adjustment” screen of the Factory Mode menu. This screen is intended only for factory use.
When EEPROM (IC902) Is Replaced
When IC902 is replaced all adjustment data revert to initial values. It is necessary to re-program this data.
After IC902 is replaced, warm up the TV for 10 seconds.
Factory/Service Mode
Procedure for the “Adjustment” Mode
This mode uses the standard remote control.  The Service Mode is activated by entering the following remote-control sequence :
1.DISPLAY => Factory
2. Standby => Mute => 1 => 8 => 2 => Power On
The “SERVICE (FACTORY)” message will be displayed. The Service Mode has four components: ADJUST, OPTION , G2-ADJUST and RESET.
Access the Adjustment Mode by pressing the “VOLUME” keys ( Up or Down). The adjustment parameters are listed in the accompanying table, and selected by pressing the CHANNEL keys Up/Down.
Selection sequences for the all system; DOWN or UP key:
SCT>SBT>BLR>BLB>RG>GG>BG>VSL>VS>VA>HS>SC>CDL>STT>AKB>PDL>NDL>PSR>NSR>SCBT>VOL>CAP>MVOL>RP00>RP01>FMWS>AGC1>OMD>SCL>PWL>MUS>AGC>DSK>DVDB
The VOLUME keys increase or decrease the adjustment values (stored in the non-volatile memory) when Adjustment Mode is cancelled.
Cancel the Adjustment Mode by re-pressing the “FACTORY” or “Power OFF” keys.
Default data values
Audio Processor Circuit Diagram
MSP3425G-B7
System control-Chroma Circuit Diagram
TDA9377 – 34C04
SMPS (Power Supply) and Deflection Circuit Diagram
KA7632 – LA7841 – KA500740RT(STR) – FQH 29A001 (LOT) – PS2561 (Opto Coupler) – TL431 (Opto-Driver)
Click on the pictures to zoom in
Posted By: FRANK at 02:29
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