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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Wednesday, 27 January 2021

REPAIRING / SERVICING TV LG 50UH630V

Technical description and composition of LG 50UH630V TV, type of panel and modules used. Module composition.

LG LED
Model: 50UH630V

Chassis/Version: UD63P

Panel: V500DJ02-KS5

LED backlight: 6202B000A1800, 6202B000A2800

T-CON: EAJDJ2S51

LED driver (backlight): integrated into PSU

Power Supply (PSU): LGP50N-16UH12 EAY64309921

PWM Power: PFC, PWM

MOSFET Power: N-FET TO-220F, TO-252

MainBoard: EAX66818104 (1.0)

MainBoard IC: CPU: M16, Audio: NTP7515D

TP: TDJN-G301D

Control: IR: UF8500_Ver1.2, WiFi: BEJLGSBWAC61 EAT63153401

Specifications 50UH630V
LG 50UH630V
General recommendations for LCD LED TV repair
Possible Fault Findings

- LG 50UH630V TV does not turn on and does not show any signs of performance at all. No reaction to remote control and front panel control buttons.

In such cases, the fault should be sought in the first place in the power module LGP50N-16UH12. Then it is necessary to measure its output voltages and in case of their absence check the power switches (N-FET TO-220F, TO-252) and rectifier diodes of the converters for possible short circuits.
If there is a breakdown in the secondary circuits, the inverter may be short-circuited, and if there is a short in the primary circuit elements, the mains fuse usually blows.
Breakdown of the Mos-Fet switches used in switching supplies is often caused by faults in other elements, such as the PWM power supply circuit, the frequency-retaining or damping circuits, and the Negative Feedback Stabilization circuit. PWM PFC, PWM chips are usually checked by replacing them with new ones or with ones known to be in good working order.

- No picture, sound, there is, the remote control reacts. Or immediately after switching on for a second the image may appear and then immediately disappear.

In some of these cases the malfunction is caused by the absence of display backlight. Very often the cause is LED failure (breakage, short circuit...) or 6202B000A1800, 6202B000A2800 connectors of strips, less often the LED driver becomes defective.
When diagnosing you should keep in mind that it is impossible to check the breakage in the chain of LED strips without disassembling the panel, using a tester or multimeter. To open all the PN-junctions connected in series, you will need a voltage of about several tens of volts, and ideally - a current source. After opening the panel, you can check each LED separately. Typically, Chinese multimeters will light up a single 3 volt LED slightly if you connect the probes to it in a forward direction. For twin 6 volt LEDs, the PN junction of its fault stabilizer can be a good indicator. If the LED is faulty, it will either be broken or shorted.

- The TV set will not turn on, the LED will indicate standby or operation mode, or it will blink.

If the LG 50UH630V has no picture but has sound, often the V500DJ02-KS5 display backlight simply isn't working. Moreover, in LED televisions usually fail LEDs inside the panel, less often the LED-driver.
In such cases, you can see a barely noticeable image when external light hits the screen.

To replace the LEDs requires disassembly of the LCD panel V500DJ02-KS5 - a process that requires the master of experience and expertise. It is not recommended to perform such works by yourself to owners of TV sets and craftsmen who have no experience in LCD panel repair

If there is no image, but backlighting works - the screen becomes slightly lighter when the TV is turned on, and in the open TV you can see the light through the holes in the body of the panel.
In this case the panel may be defective - damage to the strips, cables, for example, as a consequence of moisture after an unsuccessful washing of the screen, the T-CON board (Timing Controller) may be defective. But quite often the MainBoard EAX66818104 is defective, and software failure is also possible.
Then first it is necessary to check the panel power supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace by oscilloscope the LVDS signals from MainBoard EAX66818104, as well as synchronizing signals to the driver stubs.

Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if there was not significant damage in the cables and panel strips.

READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.

 
Repair or diagnosis of the motherboard EAX66818104 should begin with checking the stabilizers and power converters needed to power the chips and matrix. If necessary, software (software) should be updated or replaced. When repairing the MB board, check its components CPU: M16, Audio: NTP7515D. Defective elements must be replaced. If the chips with BGA soldering technology are used, the problem in its implementation is detected by the method of local heating of the chip.

If there is no TV channel reception, but the TV set is working properly from external devices, you must first check the TDJN-G301D tuner supply voltage and update the software. You have to check the I2C bus communication pulses with an oscilloscope.

Once again I would like to remind the users! The attempts to repair LG 50UH630V TV set by oneself without the corresponding qualification and necessary experience can lead to its complete unrepairability!


DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   --------->  CHASSIS : UD63P          FOR MODELS       50UH63**, 58UH63**, 50UH63**-ZA, 58UH63**-ZA, 50UH630V, 50UH635V, 58UH630V, 58UH635V.        




The appearance of the MainBoard EAX66818104 is shown in the figure below:




EAX66818104

MainBoard Appearance

Main features of the LG 50UH630V:


A matrix (LED panel) V500DJ02-KS5 is installed.
Timing Controller (T-CON) EAJDJ2S51 is used to control the matrix.
A converter combined with a power supply is used to power the backlight LEDs.
The LG 50UH630V power supply module LGP50N-16UH12, or its analogues with the use of PFC, PWM chips and N-FET TO-220F, TO-252 type power keys form the necessary supply voltages for all LG 50UH630V TV assemblies.
MainBoard - the main board (motherboard) is a module EAX66818104, with the use of chip CPU: M16, Audio: NTP7515D and others.
The TDJN-G301D tuner provides TV program reception and channel tuning.


Instructions and updates

There are download files for the 50UH630V from the manufacturer:

Update and instruction files:
File Description File Name Type Date Size
SW File (Version 05.50.95) . TV_Software_Update_Guide_v3.pdf PDF 03.09.2020 2014K update instructions
SW File (Version 05.50.95) . Firmware (USB) Software_File(Version_05.50.95).zip zip 03.09.2020 834822K
Compatible with 40UH630V-ZA, 43UH6507V-ZB, 43UH6509-ZB, 43UH650V-ZB, 43UH651V-ZE, 43UH656V-ZB, 43UH661V-ZF, 43UH664V-ZC, 43UH668V-ZA, 43UH671V-ZF, 43UH676V-ZA, 43UH7507V-ZA, 43UH7509V-ZA, 43UH750V-ZA, 43UH755V-ZD, 49UH6507-ZB, 49UH6509-ZB, 49UH650V-ZB, 49UH651V-ZE, 49UH656V-ZB, 49UH661V-ZF, 49UH664V-ZC, 49UH668V-ZA, 49UH671V-ZF, 49UH676V-ZA, 49UH7507-ZA, 49UH7509-ZA, 49UH750V-ZA, 49UH755V-ZD, 50UH630V-ZA, 50UH635V-ZA, 55UH6507-ZB, 55UH6509-ZB, 55UH650V-ZB, 55UH651V-ZE, 55UH656V-ZB, 55UH661V-ZF, 55UH664V-ZC, 55UH668V-ZA, 55UH671V-ZF, 55UH676V-ZA, 55UH7507-ZA, 55UH7509-ZA, 55UH750V-ZA, 55UH755V-ZD, 58UH630V-ZA, 58UH635V-ZA, 60UH6507-ZB, 60UH650V-ZB, 60UH676V-ZA, 65UH6507-ZB, 65UH6509-ZB, 65UH650V-ZB, 65UH661V-ZF, 65UH664V-ZC, 65UH668V-ZA, 65UH671V-ZF, 65UH676V-ZA, 65UH7507-ZA, 65UH7509-ZA, 65UH750V-ZA, 65UH755V-ZD.
SW File (Version 05.50.55) . TV_Software_Update_Guide_v3.pdf PDF 03.05.2019 2014K update instructions

User Manuals (User Manuals):
Document Language Date Size
Quick Start Guide English - English,Estonian,Latvian,Lettish,Lithuanian,Russian 01.07.2020 59 764K
Quick Start Guide English - English, Estonian, Latvian, Lettish, Lithuanian, Russian 01.07.2020 No data
Quick start guide English 11.15.2016 5087K

You can download the files for the model 50UH630V from the manufacturer's website.


Hard Reset LG TV 50UH630V
You want to restore default settings on LG 50UH630V TV? You should follow our guide and perform the hard reset operation. 

As a result, you will delete all personal information, customized settings and installed apps on your LG 50UH630V. Check out how to hard reset LG 50UH630V and wipe all personal data from the TV. It's the easiest way to bring back the default software configuration.


 Start by turning your LG 50UH630V TV on. To do so press the Power button on the remote controller. LG 50UH630V Power button


  •  After your TV turns on, press the Settings button on the remote. 
  • LG 50UH630V Settings button
  •  
  •  Use the Arrow buttons to move through the menu. LG 50UH630V Arrow buttons
  •  
  • Now select All Settings and press the OK button on the remote controller. LG 50UH630V All Settings
  •  
  • Select the General Options and press the OK button on the remote. LG 50UH630V General
  •  
  • Then select Reset to Initial Settings and press the OK button on the remote. LG 50UH630V Reset to initial settings
  •  
  • Finally, select Confirm and press the OK button. LG 50UH630V Confirm
  •  
  • Good work!



LG 50UH630V TV with V500DJ2-KS5 A LCD screen measuring 50" (127 cm) diagonally in 16:9 aspect ratio. This model uses a panel with an edge LED arrangement in the display backlight - Edge LED.
V500DJ2-KS5 matrix and MainBoard software are capable of realizing maximum UHD image quality at 3840x2160 pixels in 4K UHD, HDR. Image processing is made by modern technology High Dynamic Range (HDR) with an extended range of brightness gradation.
The model of TV 50UH630V has built-in software (software) SMART and installed the operating system webOS. Connection to the network can be made via wireless Wi-Fi connection. Input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is done in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The sound system capacity of 20 W (2x10 W) is provided by two speakers. NICAM stereo sound processing system and Sound Surround surround function are used.
Communication with other devices via external interface is supported by standard input and output sockets: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11n, WiDi, Miracast. There is a headphone jack. A VGA (D-Sub 15) connector is provided to connect a computer or laptop to this TV model. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080, 3840x2160. Digital tuner is capable to receive DVB-T, DVB-T2, DVB-C, DVB-S2 TV channels.

Dimensions: C stand 1107x702x216 mm, without stand 1107x645x79 mm.

Warning. The V500DJ2-KS5 LED TV panel is an expensive and fragile part of LG 50UH630V TV.
Do not allow any impact on the glass and pressure on the screen surface to avoid damaging the LED panel!
Also it is not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.

Posted By: FRANK at 06:15
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