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 !

Tuesday, 26 February 2019

SAMSUNG -PL42C91HPX XAP PL50C91HX XAP TROUBLESHOOTING GUIDE PLASMA TELEVISION

   SAMSUNG -PL42C91HPX XAP PL50C91HX XAP TROUBLESHOOTING GUIDE PLASMA TELEVISION 


SAMSUNG PLASMA TELEVISIONS - PL42C91HPX/XAP _ PL50C91HX/XAP [F33A N-HD                 CHASSIS] (LILY)
                                                                Part-1

  • Before start troubleshoot, check the various connections first.  
  • Check and see if there is a burned or damaged cable.
  • Check to see if there is disconnected or loose cable connection.
  • Check to see if cables are connected according to connection diagram.
  • Check the Power input to the Main Board.
  • Check the voltage in and out between the SMPS <-->Main board, between SMPS <-->X,Y Main board and between Logic boards.
SYMPTOMS: 
 The LEDs on the front panel do not work when connecting the power cable.  The SMPS relay does not work when connecting the power cable.  The unit appears to be dead.
MAJOR CHECKLIST:
 The SMPS  relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning.  In this case check the following.
  1. Check the internal cable connection.
  2. Check the fuses.
  3. Check the output voltage of SMPS. 
  4. Replace the Main Board.
SYMPTOM: 
 The SMPS relay is repeatedly turns ON and OFF.
In general the SMPS relay repeatedly turns ON and OFF by the protection function due to a defect on a board connected to SMPS.
MAJOR CHECKLIST: 
 Disconnect all cables from SMPS and operate the SMPS alone and check if the SMPS go on properly, and each output voltage is correct.
  1. If the symptom continues even when the SMPS is operated alone, it is faulty.  Replace the SMPS.
  2. If the symptom is not observed when operating the SMPS alone, find any defective assemblies by connecting the cables one by one.
  3. NB:  When sepaerating and connecting some cables, such as CN810,CN809,CN808,CN807, of the main SMPS, CN4701 of the X main Board, and CN5707 of the Y main board, a spark might be generated by the electric charge of the high-capacity capacitor.  Therefore, wait some time after disconnecting the Main Power Cord from the unit.
SYMPTOM: 
 Audio is normal,  but No Picture.
MAJOR CHECKLIST:
  • This may happen when the Main Board is functioning, but the X,Y Main Board or T buffer board is not.
  • Check the output voltage of the Main SMPS.
  • This may happen when LDVS cable connecting the Main Board and the Logic Board is disconnected.
SYMPTOM:
  Picture is normal, but there is no sound.
MAJOR CHECKLIST: 
  1. When the speaker connectors are disconnected or damaged.
  2. When the sound processing part of the Main Board is not functioning.
  3. The speaker defect.
SYMPTOM: 
 A normal/cable network analog broadcast screen is blank or abnormal, while On Screen Display is OK.
MAJOR CHECKLIST: 
  • Check the antenna connection settings.  [Air: NTSC / ATSC, Cable:NTSC].
  • Check the CVBS cable connection.
  • Check the Power Input of the main board.
SYMPTOM:  A blank vertical cell [block] appears on the screen
Fault:  Address buffer defect.  Replace the corresponding upper/lower Buffers [E,F].
COF defect. [burned];  Replace the module.

A GREEN SCREEN APPEARS, WHEN TV IS TURNED ON.
The Scale is not resetting.  Replace the Main Board.

ON THE SCREEN DISPLAY BOX IS PRESENT, BUT NO TEXT
Incorrect Program Version.  Check the version of each program.  Replace the main board.

A BLANK UPPER OR LOWER BLOCK APPEARS ON THE SCREEN
Upper or Lower Y buffer defect.  
Replace the corresponding Upper/lower buffers [E,F]

EITHER THE MAIN OR SUB PICTURE DOES NO APPEAR
Replace the main board.

A VERTICAL GREEN LINE APPEARS ON THE SCREEN
The SMPS voltage is incorrect.  Adjust the SMPS voltage according to the voltage printed on the module label.

DIM SCREEN / BLURRED IN RED
X-Main board defect.  Replace X-main board.

A BLACK SCREEN APPEARS
Replace 'Y" Main Board

SAMSUNG PLASMA DISPLAY - PL42C 91HPX/XAP _ PL50C 91HX/XAP [Troubleshooting ]


SAMSUNG: PL42C 91HPX/XAP & PL50C 91HX/XAZ - PLASMA DISPLAY.
                                                               [Part-2]
 TROUBLESHOOTING PROCEDURES BY ASSEMBEY. SERVICE MODE & DRIVE BOARD TROUBLESHOOTING

  1. SMPS-PDP TV: Can be located at the top center of the panel, look after back cover opened.  [No Power, Blank Screen, the Relay repeats ON OFF.]
  2. ASSY PDP MODULE P-X-MAIN: Vertically fitted on the right side of the panel,  look after back cover opend. [Blank Screen].
  3. ASSY PDP MODULE P-Y-MAIN:  Can be located on the Left side of the panel, next to Main AMPS. [Blank Screen]
  4. ASSY PDP MODULEP-LOGIC MAIN:  Can be located next below the SMPS power supply board. [Blank screen, Screen noise]
  5. ASSY PDP MODULEP-Y-MAIN SCAN BUFFER:  Can be located at the extreme left, fitted vertically. [Row Bar screen is blank]
  6. ASSY PDP MODULE P-ADDRESS E BUFFER: Can locate at the bottom left side. [Corresponding buffer Board block screen is blank]
  7. ASSY PDP MODULE P-ADDRESS F BUFFER: Can locate at the bottom right. [Corresponding buffer board Block screen is blank]
  8. ASSY PCB MISC-MAIN: Located just below the SMPS board. [No power, Abnormal screen for each input source, PIP screen trouble, Sound trouble]
  9. ASSY BOARD P-FUNCTION: Located extreme left down side. [The side function key does not properly]
  10. ASSY BOARD P-POWER&IR: Located at the bottom side [The remote control does not work properly, the LED does not work properly.
  11. ASSY BOARD P-SIDE AV: Located rigth bottom side [The AV-2 and S-Video 2 do not work properly]
DRIVE BOARD TROUBLESHOOTING
  • No voltage output => Operating voltage does not exists => PSU
  • No Display => Operating Voltage exists, but no image on screen => Y-MAIN, X-MAIN, Logic Main, Cable.
  • Abnormal Display => Abnormal image on screen, (Not open or short) => Y-MAIN, X-MAIN, Logic Main.
  • Sustain Open => Some horizontal lines does not exist on screen => Scan buffer, FPC of X/Y
  • Sustain short => Some horizontal lines appears to be linked on screen => Scan Buffer, FPC of X/Y
  • Address Open => Some vertical lines does not exist on screen => Logic Main, Logic Buffer, TCP
  • Address short => Some vertical lines appears to be linkde on screen => Logic Main, Logic Buffer, TCP
SERVICE MODE [WITH GENERAL REMOTE CONTROL]
TO ENTER SERVICE MODE:  POWER OFF=>MUTE=>1=>8=>2=>POWER ON
TO EXIT FROM SERVICE MODE: POWER OFF=>POWER ON
TO ENTER SERVICE MODE [WITH FACTORY REMOTE CONTROL]
POWER ON=> INFO=> FACTORY key
TO EXIT FROM SERVICE MODE
POWER OFF=>POWER ON
Press the factory key twice, with a keystroke interval of more than one second.[Pressing once enters Aging Mode].
Posted By: FRANK at 03:56
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