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 !

Friday, 8 March 2019

SAMSUNG HT-C350 HT SYSTEM INITIALIZATION SOFTWARE UPDATE AMPLIFIER TESTING AND POWER SUPPLY CIRCUIT

SAMSUNG HT-C350 HT SYSTEM INITIALIZATION SOFTWARE UPDATE AMPLIFIER TESTING AND POWER SUPPLY CIRCUIT

HT SYSTEM 

SAMSUNG HT-C350 

INITIALIZATION SOFTWARE UPDATE AND POWER SUPPLY CIRCUIT 

Operation of Power Block Protection Circuit
The Condition of Power Protection Active.
1. Voltage of SMPS’s PVDD (+22.5V, CON2) is higher or lower than Standards.
Normal Condition Voltage Range: PVDD (+22.5V, CON2): about 22.5V
2. Over-current occurs to AMP IC. (Over-output or Output short)
3. AMP IC’s temperature exceed 150°C.
4. No supply voltage on GATE DRIVER
SMPS
+12V
+5.8V
PVDD (about 22.5V)
+12V
AMP Power Stage TAS5342
1. OTW: Active, IC’s inner temperature exceeds over 150°C.
(Under 2.7V, Protection Circuit wills Active)
2. SD: Shout down.
(Under 2.7V, Protection Circuit wills Active)

MP Pre-inspection
You can check AMP Malfunction before disassembling Main Unit. (Do not insert AC-Cord in AC-Socket)

Measurement Resistance using Tester
F/R CH
10kΩ
CENTER
10kΩ
SUBWOOFER
10kΩ

If measured resistance is very different from above numbers. There is a problem. > AMP PCB Problem

DVD flash Initialization & Update
Checking out MICOM & MPEG flash Version
1. Select the Setup-Support-Product information to check the Program version on the screen and front VFD display.
DVD flash Initialization & Update (firmware)
1. Prepare USB that contains SSP file(Micom) and ROM file(MPEG) for Update.
2. Select the folder which has update file, then “Updating” will appear on the screen.
After completing the update, the power will go out and on, then tray will open automatically.
3. Make the unit “NO DISC” state if there is a disc and then close the tray.
4. Press “STOP” button of Main Unit 5 seconds more, display indicator shows “INITIALIZE” then power go out.
5. Initialization complete
Buyer-Region Code Setting Method
The inserting method of Region Code after replacing the Main PBA
When replacing the Main PBA and System Micom should be inserted the region code.
- The set is not working properly if you don't insert the region code.
- The region code is inserted by the remote control.
1. Press the “AUX” button on the remote control.
2. Press the "TUNER MEMORY" button on the remote control during 4-5 seconds.
3. After step (2), you can see “TEST” on the VFD.
4. When you see “TEST” on VFD, Insert number “4”, “6” to start Region Code setting mode.
5. After step (4), you can see “− −” on the VFD. Insert the Region Code (Below table) corresponding model with “0 - 9” buttons on the remote control.
6. After step (5), you can see “15 USA” on the VFD. It means that currently System Micom program is installed by USA specification.
7. Turn the Power off.
In case of System Micom and EEPROM problem, you can apply to this. For example, during Updating program of System Micom, if Updating fail is happened, it is impossible to turn on the system from stand-by status. The system will keep the stand-by status continuously, and the touch-key function will never work. In this case, you have to change System Micom, and set up the Buyer Region code again. In case of EEPROM, you don't need to care about it. After set-up the Region code, System Micom will store the information of the region code to EEPROM automatically.
POWER SUPPLY CIRCUIT 
USING ICE2QSO1
CLICK ON THE IMAGE TO ZOOM IN
Posted By: FRANK at 02:05
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