Technical description and composition of the HYUNDAI H-LED39R403BT2 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: H-LED39R403BT2
Chassis / Version: CV512H-U42
Panel: LC390TA2A
LED backlight: CC02385D671V03 385B
LED driver (backlight): integrated into MainBoard
PWM LED driver: 8pin
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: CV512H-U42 - 11
IC MainBoard: SPI Flash: W25Q64
Tuner: CDT-9NT372-RD60
Control: IR: DLED385E20-IR XTG20170519
Technical Specifications H-LED39R403BT2
HYUNDAI H-LED39R403BT2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- HYUNDAI H-LED39R403BT2 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard CV512H-U42 main board. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches (TO-252) and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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, the screen is black, there is sound, with external illumination of the screen, you can sometimes see barely noticeable outlines of the image.
As a rule, in such cases there is no display backlight. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver also turns out to be faulty.
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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - SPI Flash: W25Q64. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the tuner CDT-9NT372-RD60, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the HYUNDAI H-LED39R403BT2 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete failure of the device!
FIRMWARE FOR SPI FLASH -----------> HYUNDAI H-LED39R403BT2, Main: CV512H-U42 - 11, Panel: LC390TA2A
The appearance of the MainBoard CV512H-U42 is shown in the figure below:CV512H-U42
CV512H-U42 can be used in TVs:
DEXP H39D7000Q (Panel LC390TA2A), SUPRA STV-LC32LT0010W (Panel KM0320LDRH0037).
Main features of the HYUNDAI H-LED39R403BT2 device:
Installed matrix (LED-panel) LC390TA2A.
To power the backlight LEDs, a converter is used, combined with the main board CV512H-U42, controlled by an 8pin PWM controller. As power elements of the LED driver, keys of the TO-252 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is a CV512H-U42 module, using SPI Flash chips: W25Q64 and others.
The tuner CDT-9NT372-RD60 provides the reception of television programs and tuning to channels.
HYUNDAI H-LED39R403BT2 TV with LCD display LC390TA2A, diagonal size 39 "(99 cm) 16: 9 format. The required brightness of the screen is 230 cd / m² LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. Direct LED backlighting with direct LEDs is implemented in the LCD panel of the TV, you can view HD images in high resolution at 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). Supported media file formats: MP3, MPEG4, MKV, JPEG Stereo Sound implemented by two built-in speakers, NICAM STEREO audio processing system is used.
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.
Overall dimensions: without stand 885x509x66 mm.
TV mass: without stand: 6.2 kg.
Attention! The HYUNDAI H-LED39R403BT2 LED TV panel LC390TA2A 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.