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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday 16 March 2019

SAMSUNG CL29Z50M - CTV - TROUBLESHOOTING & ERROR CODES - DIAGNOSIS

SAMSUNG CL29Z50M - CTV - TROUBLESHOOTING & ERROR CODES - Diagnosis


ERROR MODES

NO POWER

CLICK ON PICTURES TO ZOOM.  Click ß at the top left of the browser, to come back.
NO VIDEO

NO SOUND

Tuner Diagnosis
The RF / CTV signal is transmitted to the Tuner of the Main Board. If the signal is not received, check the following items.
  • Power supply: 5V, 33V
  • Check for RF defects: Check the IF output
  • Check for AUDIO defect: Check the SIF Signal output


Micom Diagnosis

VSP/MSP/DRX Block ETC
  • Power supply: 3.3V, 5V, 8V
  • Check for input defects: Y/C(CVBS, S-VHS), 480i Y/Pb/Pr signal
TDA7266SA / TDA7297SA (Audio Processor) Diagnosis


This receives the signal from the Audio Processor (VCTI) and outputs the signal in7W+7W / 10W + 10W sound.
  • Power supply : 14V
  • Check for input defects : AMP-R,AMP-L
  • Check for output defects : L+, L-, R+,R-


Troubleshooting Deflection Block

Countermeasures by Deflection Types
The screen is blank and only the relay repeats close and open when turning the power on.  This happens when the vertical voltage or vertical signal is not supplied, and because the Micom operates for 5 to 10 seconds and then turns the power off by force as it cannot detect the vertical signal.
CHECK POINT
Check that the vertical output voltage is measured in the FBT terminal.
VCC (+) : +16.5V
VCC (-) : -16.5V
  If you cannot measure the output voltage, check that the collector voltage of the horizontal TR is 1360V.  If the voltage is measured, the problem is a defect in the FBT unit.  (When you don't have an oscilloscope, and you can hear the high-voltage sound, you can determine that the horizontal TR is normal.)
Is the vertical input waveform output from the VCTI VDP Pin.
Posted By: FRANK at 05:30
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