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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 12 March 2019

SAMSUNG HT-BD1255 POWER SUPPLY CIRCUIT AND BLOCK DIAGRAM

SAMSUNG HT-BD1255 POWER SUPPLY CIRCUIT AND BLOCK DIAGRAM


SAMSUNG HT-BD1255 

BLU RAY HOME THEATER 

POWER SUPPLY CIRCUIT AND BLOCK  DIAGRAM 

BLOCK DIAGRAM  

DESCRIPTION

# MAIN SYSTEM (BCM7440P) is connected to whole HT-BD1250 function IC. For HDMI 1080P, BCM7440P transfer the digital video signal with 24bit to HDMI TX chip SIL9134. BCM7440P doesn’t need external up scaling IC because it has a own internal scalar. About it has internal video DAC, so it transfer the analog signal to MM1757, BCM7440P.
MM1757 are video filter and amp.
 # AUDIO DSP (TM320D788) is connected to MAIN SYSTEM. They get the DIGITAL audio signal from main system with bit stream status. And after decoding the signal, they send the digital signal, which is already decoded, to DIGITAL AMP PWM driver IC.
# MAIN SYSTEM MICOM control BCM7440P, AUDIO DSP MICOM, CEC. He gets all information from BCM7440P, and then transfer the information to AUDIO DSP MICOM. They have a communication among them with HOST ↔ SLAVE
Interface. And MAIN SYSTEM MICOM gets the information from User’s remote control. So whenever he get the information, he displays it on the VFD.
# The loader transfer the source audio, video data to BCM7440P.
# Both of USB are available, but front USB is for LOCAL STORAGE of PROFILE 1.1/2.0 and USB HOST function, whire Rear USB is for wireless LAN Dongle.
# DIGITAL IN 1, 2 (SPDIF IN), AUX IN and Tuner IN are each connected to DIR and ADC IC. And then after transforming DIGITAL SIGNAL (SPDIF IN is DIGITAL signal), the audio signal transfers to AUDIO DSP.

POWER SUPPLY CIRCUIT 
110V VERSION

220V VERSION 
CLICK ON THE IMAGES TO ZOOM IN
Posted By: FRANK at 09:47
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