Technical description and composition of the SAMSUNG UE40JU7000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40JU7000
Panel: CY-GJ040FLLV1V
T-CON: BN41-02297A
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00810A L40S7_FSM - PSLF211M07A
MainBoard: BN41-02356C
IC MainBoard: TPS54427, S13A1D183KEX, TPS54427
Tuner: BN40-00318B
Technical Specifications UE40JU7000
SAMSUNG UE40JU7000
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE40JU7000 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Failure in such cases should begin to be sought in the power supply circuits of BN44-00810A. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Often in such cases, there is no LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-02356C motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TPS54427, S13A1D183KEX, TPS54427 which may require replacement with new ones. If the BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The malfunction of the tuner BN40-00309A is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to self-repair a SAMSUNG UE40JU7000 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
The appearance of the MainBoard BN41-02356C is shown in the figure below:BN41-02356C
The appearance of the power supply
Main features of the SAMSUNG UE40JU7000 device:
Installed matrix (LED panel) CY-GJ040FLLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02297A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40JU7000 TV is carried out by the BN44-00810A power module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02356C module, using TPS54427, S13A1D183KEX, TPS54427 and others.
The tuner BN40-00318B provides the reception of television programs and tuning to channels.
Technical description
SAMSUNG UE40JU7000 TV with a CY-GJ040FLLV1V LCD display, diagonal size 40 "(102 cm) in 16: 9 format. This model uses a panel with the end position of the LEDs in the display backlight - Edge LED.
There is support for 3D images with active (shutter) technology for separating the right and left channels.
The CY-GJ040FLLV1V display and BN41-02356C board software provide high-quality viewing of UHD 4K at a resolution of 3840x2160 pixels in the 4K UHD standard.
The UE40JU7000 is equipped with SMART software (software), embedded applications and the ability to work on the Internet. A network connection can be made via Wi-Fi. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Digital signal graphic processing is performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide two speakers. It uses the NICAM stereo audio processing system and Sound Surround.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x4, MHL, USB x3, RS-232, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11n . A headphone jack is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080, 3840x2160.
A digital tuner can receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed by the TV from the network in operating mode is 160 watts.
Overall dimensions: with stand 918x588x272 mm, without stand 918x536x67 mm.
TV Weight: with stand: 10.4 kg, without stand: 8.3 kg.
Attention! The panel of the SAMSUNG UE40JU7000 LED TV CY-GJ040FLLV1V is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
Recommendations to users of SAMSUNG UE40JU7000
If a TV malfunction occurs, it is advisable to inquire about the manufacturer's (seller's) warranty obligations in the accompanying documents (warranty card).
If the SAMSUNG UE40JU7000 does not turn on or turns off periodically, check the sockets and extension cords at the points where the TV is connected to the network.
If the SAMSUNG UE40JU7000 does not respond to the remote control, but the buttons on the TV control panel work, there is a certain probability of a malfunction of the remote control (the remote does not work). It is advisable to check or replace the batteries in it.
If, when viewing broadcasting programs, a notification of the absence of a signal appears (no signal), you should check the antenna or cable equipment and the settings for the programs.
If necessary, you can verify the operability of the TV from other external devices.
If there is no sound when watching analog television programs, you should check the sound system in the settings. For Russia D / K (6.5 MHz), for European countries B / G (5.5 MHz). In modern TVs, a region is usually chosen to set the color and sound standards - for Russia, “East Europe” (Eastern Europe).
If SAMSUNG UE40JU7000 hangs during operation, does not respond to either the remote control or the control panel buttons, sometimes a reboot helps. To do this, you must completely disconnect the TV from the network by pulling the plug from the outlet, and turn it back on after 10-15 seconds.
If the screen is broken or cracked
SAMSUNG UE40JU7000 LED TV screen requires a careful attitude. Glass can crack even with a light blow from a children's toy.
No less dangerous is excessive pressure on the surface of the screen over any part of the area.
If the screen is damaged, it will be necessary to replace the CY-GJ040FLLV1V LED panel. In such cases, the price must be clarified in the SAMSUNG Authorized Service Center at the numbers indicated in the accompanying documents, or on the official website of the manufacturer.
In most cases, such repairs are not economically feasible.
For masters and advanced users.
If the SAMSUNG UE40JU7000 does not have an image, but there is sound, the CY-GJ040FLLV1V display backlight often just does not work. Moreover, LED-TVs usually fail LEDs inside the panel, less often LED-driver.
In such cases, you can see a barely noticeable image with a successful hit of external lighting on the screen.
To replace the LEDs, the CY-GJ040FLLV1V LCD panel must be disassembled - a process that requires experience and qualification from the master. We do not recommend doing such work on your own for TV owners and craftsmen who do not have experience repairing LCD panels.
If there is no image, but the backlight works, the screen becomes a little lighter when you turn it on, and in the open TV you can see the light through the holes in the panel body.
In this case, the panel may also be faulty - damage to the strips, loops, for example, as a result of moisture ingress after an unsuccessful screen wash, the T-CON (Timing Controller) board may be faulty. But often the MainBoard BN41-02356C mainboard also turns out to be faulty, and a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to use an oscilloscope to track the passage of LVDS signals from the MainBoard BN41-02356C, as well as synchronizing signals to the loops with the drivers.
Filled or poorly washed LED-TV screens have the opportunity to recover, in about half the cases, usually if significant damage has not formed in the cables and planks of the panel.
