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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Friday 17 September 2021

REPAIRING / SERVICING TV SAMSUNG UE55J5500AU

 Technical description and composition of SAMSUNG UE55J5500AU TV, type of panel and modules used. Module composition.
Composition
Specifications
SAMSUNG UE55J5500AU
LCD TV LED Smart TV UE55J5500AU | Year of manufacture: 2015
Screen diagonal: 55" (140 cm)
Screen format: 16:9
Resolution: 1920x1080
LCD panel type: T550HVF07.0
LED backlight: Yes
Smart: Yes. Wi-Fi support: yes
Picture-in-Picture (PIP): Yes
Support HD: 1080p Full HD
Progressive scan: yes
TV standards: PAL, SECAM, NTSC
Digital tuner: DVB-T, DVB-T2, DVB-C
Teletext: Yes
DTV formats: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Multimedia: MP3, WMA, MPEG4, DivX, MKV, JPEG
Sound stereo: there is
Sound Power: 20W (2x10W)
Acoustics: two speakers
Interface: AV, component, HDMI x3, MHL, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11n
Headphone jack: yes
TV weight: with stand: 14.6 kg
Without stand: 13.6 kg
Dimensions: with stand 1232x770x310mm


SAMSUNG LED
Model: UE55J5500AU

Chassis/Version: DH01

Panel: T55HVF07.0 GJ055BGA-B1

LED backlight: 2014SVS55_3228_R05_REV1.1_140111, 2014SVS55_3228_L07_REV1.1_140111

T-CON: T550HVN08.3 Ctrl BD 55T23-08

LED driver (backlight): integrated into PSU

PWM LED driver: SLC7014X

MOSFET LED driver: FDPF3N50NZ

Power Supply (PSU): BN44-00704E L55S1_FHS

PWM Power: FA5695N, PWM FA6A20N

MOSFET Power: MMF60R360P, MMD50R380

MainBoard: BN41-02353B BN94-09122F

IC MainBoard: CPU: SDP1415, EMMC: THGBMBG5D1KBAIT, RAM: K4B4G16460-BCMA

CPU: BN40-00318B

Control: IR: BN41-02150A, WI-FI: WIDT30Q BN59-01174D
General advice about LCD LED TV repair
Possible problems

- SAMSUNG UE55J5500AU TV does not turn on, does not respond to the remote and control panel buttons, does not shine or blink indicators.

In this case the main switching power supply (PMS) BN44-00704E is most likely defective. Make sure there are no output voltages and if not check the power switches (MMF60R360P, MMD50R380) and rectifier diodes for possible short circuits.
At breakdown of semiconductors in the secondary circuits of any converter, as a rule, it can work in the short-circuit emergency mode without output voltages, and at short circuit in the primary circuit elements the mains fuse and more rarely the current sensor at the source of the key most often break down at once.
Breakdown of Mos-Fet switches, used in pulse sources, is often caused by failure of other elements, for example, in PWM regulator supply circuit, in frequency-retaining or damping circuits, as well as in the Negative Feedback Stabilization. PWM chips FA5695N, PWM FA6A20N are usually checked by replacement with new or known good ones.

- No picture, but there is sound and reaction to the remote control. Or the image may appear for a second right after turning on.

In these cases the defect in the backlighting of the LED panel is the most probable. Often the cause of the malfunction is the lack of current in the circuit of the LEDs, for example, their breakage or short circuit, or violation of the contact connections of the connectors 2014SVS55_3228_R05_REV1.1_140111, 2014SVS55_3228_L07_REV1.1_140111.
To test LED strips to open all LED junctions, several tens of volts or more are needed, it is best to use a current source for such purposes. Breakage of several PN-junctions connected in series cannot be detected with a multimeter or a tester. In such cases, you need to open the panel and check each LED. If your multimeter can't open the transitions of the LEDs in forward bias, you can sometimes detect the PN junction of a protective stabilizer by connecting the probes in the opposite direction. If the regulator is open or broken in K/Z, then the LED is faulty and needs to be replaced.


If the SAMSUNG UE55J5500AU has no picture but there is sound, often the display backlight of the T550HVF07.0 simply does not work. Moreover, in LED TVs usually fail the LEDs inside the panel, less often the LED-driver.
In such cases you can see a faintly visible image when external light hits the screen.

To replace the LEDs requires disassembly of the LCD panel T550HVF07.0 - the process requiring the master of experience and skill. We do not recommend to make such repairs by yourself to owners of TV sets and craftsmen without any experience in LCD panel repair

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


If there is no image, but backlighting works - the screen becomes a little lighter when 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 BN41-02353B is defective and so is the software.
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 BN41-02353B, as well as synchronizing signals to driver stubs.

Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if there is no significant damage in the cables and panel bars.
- TV does not go into operating mode, remote control does not respond. Front panel LED is either on all the time or is blinking.

Repair or diagnostic of the motherboard BN41-02353B should begin with checking the stabilizers and power converters necessary to power the microchips and matrix. If necessary, software (software) should be updated or replaced. Complex repair of MB (SSB) is possible only in the conditions of the service center with the necessary equipment. Check or replacement of elements CPU: SDP1415, EMMC: THGBMBG5D1KBAIT, RAM: K4B4G16460-BCMA requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technology can sometimes be diagnosed by the heating method.

If you cannot tune to the on-air or cable TV channels make sure that the software is correct, and also that the supply voltages on the tuner BN40-00318B outputs correspond to the nominal ones. Also it is necessary to supervise with the help of an oscilloscope the presence of the tuner data exchange pulses with a processor via the I2C bus.

Warning. Users and owners of TV sets UE55J5500AU, not having the appropriate qualifications, knowledge and experience, strongly advise against trying to repair yourself to avoid the negative consequences that can lead to total unrepairable device.



DOWNLOAD SCHEMATIC DIAGRAM  ------------->    BN44-00704E Power supply.


More on MainBoard repair

The MainBoard BN41-02353B is shown in the picture below:

BN41-02353B

The BN41-02353B can be used in televisions:


 

SAMSUNG UE40J6390 (Panel CY-GH040CSLV1V), SAMSUNG UE40J5530AU UE40J5530 (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5500AU (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5550 UE40J5550AU (Panel CY-GJ040BGSV1V), SAMSUNG UE40J6330AU (Panel CY-GH040CSLVFV), SAMSUNG UE32J6300 UE32J6300AU (Panel CY-GH032CSLV5V), SAMSUNG UE48J6200AU (Panel CY-GH048CSLVAV), SAMSUNG UE48J5510AU (Panel CY-GJ048BGLV3V), SAMSUNG UE32J6500AU UE32J6500 (Panel CY-WJ032CGLV2V), SAMSUNG UE40J5520AU UE40J5520 (Panel CY-GJ040BGSV5V), SAMSUNG UE43J5500 UE43J5500AU (Panel T430HVF01.0), SAMSUNG UE40J6200AU UE40J6200 (Panel CY-GH040CSLV8V), SAMSUNG UE32J5550AU UE32J5550 (Panel CY-GJ032BGAB3V), SAMSUNG UE32J5500AU (Panel T320HVF05.5), SAMSUNG UE40J6590 UE40J6590AU (Panel CY-WJ040CGLV1V), SAMSUNG UE40J5510AU (Panel CY-GJ040BGSV3V).

Appearance of the power supply

The main features of the device SAMSUNG UE55J5500AU:

A matrix (LED panel) T55HVF07.0 GJ055BGA-B1 is installed.
The matrix is controlled by the Timing Controller (T-CON) T550HVN08.3.
A converter combined with a power supply is used to power the backlight LEDs and is controlled by the SLC7014X PWM controller. FDPF3N50NZ type switches are used as power elements of LED-driver.
Required supply voltages for all SAMSUNG UE55J5500AU components are generated by the power supply module BN44-00704E or its analogues using FA5695N, PWM FA6A20N chips and power switches like MMF60R360P, MMD50R380.
MainBoard - the main board (motherboard) is a module BN41-02353B, with the use of chips CPU: SDP1415, EMMC: THGBMBG5D1KBAIT, RAM: K4B4G16460-BCMA and others.
The BN40-00318B tuner allows you to receive TV programs and tune to channels.

Instructions and updates


There are downloadable files for the model UE55J5500AUXRU from the manufacturer:

Latest software updates, firmwares (latest firmwares):
File type File name Version date Size
Update file (USB) T-HKMFDEUC.zip 1550.0 31.01.2020 1180.22 Mb
Firmware Update User Manual 2015_TV_Firmware_Upgrade_Instruction_T-HKMFDEUC.pdf 1.0 14.04.2015 0.36 Mb
Update file (USB) T-HKMFDEUC_1550.0.exe 1550.0 03.12.2019 1179.95 Mb
Update file (USB) T-HKMFDEUC_1550.0_RU.exe 1550.0 31.01.2020 1179.95 Mb

User Manuals (User Manuals):
File Type File Name Version Date Size
e-Manual ENG_HMFDVBEUJ-1.308.pdf - 06/30/2015 6.28 Mb
e-Manual RUS_HMFDVBEUJ-1.308.pdf - 30.06.2015 6.19 Mb
UJ5500-RU_BN68-07047H-02L04-0327-1.pdf 1.0 03.04.2015 14.9 Mb
Installation Guide UJ5500-QSGBN68-07063A-02-0527.pdf - 08/25/2015 2.21 Mb

You can download the files from the manufacturer's website for the model UE55J5500AUXRU.



SAMSUNG UE55J5500AU TV with LCD display T550HVF07.0, size diagonally 55" (140 cm) format 16:9. In the manufacturing technology of the display of this model is implemented LED backlight.
Matrix T550HVF07.0 and MainBoard software provide for viewing shows and movies in high quality HD resolution 1920x1080 pixels in 1080p (Full HD).
The UE55J5500AU features SMART software, built-in applications and Internet connectivity. Connection to the network can be made through Wi-Fi wireless communication. Input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphical processing of a digital signal is done in 480i, 480p, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The sound system capacity of 20 W (2x10 W) is provided by two speakers. It uses NICAM stereo sound processing and Sound Surround surround function.
Communication with other devices via an external interface is supported by standard input and output connectors: Antenna input (RF), AV, component, HDMI x3, MHL, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11n. 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. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C TV channels.

Overall dimensions: with stand 1232x770x310 mm, without stand 1231x712x68 mm.

TV weight: with stand 14.6 kg, without stand 13.6 kg.

Warning. The panel T550HVF07.0 of SAMSUNG UE55J5500AU LED TV is an expensive and unreliable part of it.
Do not allow any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also 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.