Technical description and composition of the HYUNDAI H-LED39R403ST2 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: H-LED39R403ST2
Chassis / Version: CV512H-U42
Panel: LC390TA2A 01
LED backlight: PANDA385L and PANDA385R
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3267
MOSFET LED driver: ME15N10-G
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: 7N60 TO-220F
MainBoard: CV512H-U42
IC MainBoard: SPI Flash: W25Q64, Audio: RDA3118E28 (TPA3110D)
Tuner: CDT-9NT372
Technical Specifications H-LED39R403ST2
HYUNDAI H-LED39R403ST2
General repair guidelines for TV LCD LED
Possible malfunctions
- HYUNDAI H-LED39R403ST2 does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light up and do not blink.
The malfunction in such cases should be sought in the elements of the power source - the AC / DC converter, which is located on the MainBoard CV512H-U42 main board. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (7N60 TO-220F) and rectifier diodes in the converters for a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM SOT23-6 PWM controllers, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
As a rule, in this case, the LED backlight turns out to be faulty. The reason can sometimes be in the power of the LEDs, but more often in their malfunction (breakdown or break), sometimes in the violation of the contact connections of the LED strips.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- 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 CV512H-U42 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its components SPI Flash: W25Q64, Audio: RDA3118E28 (TPA3110D). Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune to television channels, the tuner CDT-9NT372 may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of the HYUNDAI H-LED39R403ST2 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> LG 43UH671V Chassis UD63J
The appearance of the MainBoard CV512H-U42 is shown in the figure below:Cultraview CV512H-U42
CV512H-U42 can be used in TVs:
DEXP H39D7000Q (Panel LC390TA2A), SUPRA STV-LC32LT0010W (Panel KM0320LDRH0037).
Main features of the HYUNDAI H-LED39R403ST2 device:
Installed matrix (LED panel) LC390TA2A 01.
To power the backlight LEDs, a converter is used, combined with the main board CV512H-U42, controlled by a BIT3267 PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The power module is combined with the MainBoard and is made according to the scheme of a flyback AC / DC voltage converter using PWM SOT23-6 microcircuits and power switches of the 7N60 TO-220F type.
MainBoard - the main board (motherboard) is a CV512H-U42 module, using SPI Flash chips: W25Q64, Audio: RDA3118E28 (TPA3110D) and others.
Tuner CDT-9NT372 provides the reception of television programs and tuning to channels.
HYUNDAI H-LED39R403ST2 TV with a 39 "(99 cm) diagonal LCD display in 16: 9 format. The required screen brightness of 230 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1 Direct LED backlighting with direct LEDs is realized in the LCD panel of the TV, and HD images can be viewed in high resolution at 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready) Supported media file formats: MP3, WMA, MPEG4, DivX , JPEG.
The power of the sound system 20 W (2x10 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), component, HDMI x3, USB.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 75 watts.
Overall dimensions: without stand 885x509x66 mm.
TV mass: without stand: 6.2 kg.
Attention! The panel of the HYUNDAI H-LED39R403ST2 LED TV 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.