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 !

Saturday, 16 March 2019

SAMSUNG CW29Z306VBXXEC - TROUBLESHOOTING BY CHART

SAMSUNG CW29Z306VBXXEC - TROUBLESHOOTING BY PARTS


SYSTEM BOARDS TROUBLESHOOT
Tuner Diagnosis
If no signal is received even though the RF signal from the external aerial is connected to the MAIN Board Tuner, check the following items.
  1. Supply Power: 5V, 9V, 33V
  2. Check for an RF defect: Check the CVBS output
  3. Check for an AUDIO defect: Check the SiF Signal output.
External Input Diagnosis
It receives the EXT1/EXT2/signal and consists of monitor output (video and audio).  The signal is input to VSP9402 through the port. If no signal input/output is detected, check the following items.
  • Power supply : VSP9402 (3.3V,1.8V) , CXA2180(5V)
  • Check if the input and output jacks are defective.
CLICK ON THE PICTURES TO ZOOM
DNIe (SPD41) Diagnosis
The signal is received from the Audio Processor (MSP3421G) and sound is output at 10W + 10W power.
Power supply :15V
  • Check for input defects : L/R
  • Check for output defects : L+, L-, R+, R-
STV8237(Audio Processor) Diagnosis.  It processes the SIF and SCL 1/2 signal output from the Tuner.
Power supply : 3.3V,1.8V,9V , 5V
Check for input defects : SIF, SCL1/2-IN,SCL1/2-OUT
Check for output defects : SOUND L/R.
VSP9402 Diagnosis
It receives RF, AV1/2/3 and S-VHS (Y,C) signals and outputs to Y/Pb/Pr of CXA2180Q, M-OUT and V-OUT through internal switching.
  • Power supply :1.8V, 3.3V
  • Check for input defects : RF, SCL1/2,S-VHS(Y,C)
  • Check for output defects :M-OUT,Y,Pb,Pr,HS1,VS1.
CXA2180 Diagnosis
The Y/Pb/Pr signal is received from VSP9405B and CXA2151Q and the signal is output as R/G/B. It also outputs the V/H Drive, E/W and performs the ABL and EHT operation.  If V-Drive output is not detected, check for an IC defect..
  • Power supply : 5V, 9V
  • Check for input defects : Y/Pb/Pr, H/V
  • Check for output defects : R/G/B, ABL, EW, V/H-DRIVE.
Posted By: FRANK at 05:15
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