Technical description and composition of the HYUNDAI H-LED32R403BT2 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: H-LED32R403BT2
Chassis / Version: CV512H-U42
Panel: VVH32L147G22LTY
LED backlight: CC02320D570V12 320L 32E9 7S1P 2X7 1210
LED driver (backlight): integrated into MainBoard
PWM LED driver: 8 pin
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: CV512H-U42
IC MainBoard: SPI Flash: W25Q64, Audio: RDA3118E28 (TPA3110D)
Tuner: CDT-9NT372-RD60
Technical Specifications H-LED32R403BT2
HYUNDAI H-LED32R403BT2
General repair guidelines for TV LCD LED
Possible malfunctions
- HYUNDAI H-LED32R403BT2 does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light and do not blink.
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. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (TO-252) and the rectifier diodes of the converters for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
As a rule, in such cases there is no display backlight. Often the cause of the malfunction is the lack of current in the LED circuit, for example, an open or short circuit, or a violation of the contact connections of the connectors.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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). 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 you suspect a malfunction of the CDT-9NT372-RD60 tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding tuner pins.
We recommend the owners of the H-LED32R403BT2 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE FOR SPI FLASH -----------> HYUNDAI H-LED32R403BT2, Main: CV512H-U42, Panel: VVH32L147G22LTY
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-LED32R403BT2 device:
Installed matrix (LED-panel) VVH32L147G22LTY.
To power the backlight LEDs, a converter is used, combined with the main board CV512H-U42, controlled by an 8 pin 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, Audio: RDA3118E28 (TPA3110D) and others.
The tuner CDT-9NT372-RD60 provides the reception of television programs and tuning to channels.
HYUNDAI H-LED32R403BT2 TV with VVH32L147G22LTY LCD display, diagonal size 31.5 "(80 cm) 16: 9 format. The required brightness of the screen is 230 cd / m² LED backlighting. Contrast ratio 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, it is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Supported media file formats: MP3, MPEG4, MKV, Jpeg.
The power of the sound system 10 W (2x5 W) provide two speakers. The audio processing system NICAM STEREO 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 735x433x74 mm.
TV mass: without stand: 4.2 kg.
Attention! The VVH32L147G22LTY panel of the HYUNDAI H-LED32R403BT2 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.
