Technical description and composition of the HYUNDAI H-LED19V5 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: H-LED19V5
Chassis / Version: MST6M182VG-T7S
Panel: LM185WH2 (TL)
LED backlight: LM185WH2 IMA185A0U rev.J 100914
LED driver (backlight): integrated into PSU
PWM LED driver: MP3389EF
MOSFET LED driver: ME4436
Power Supply (PSU): K-40L1 465-01A2-B5269G 4710-B33620-A3225K31
PWM Power: OB5269CP
MOSFET Power: SW7N65
MainBoard: 471-01A2-61703G MST6M182VG-T7S
IC MainBoard: CPU: MST6M182VG-T7S, SPI Flash: 25Q32
Tuner: KTDANW-14-09
Technical Specifications H-LED19V5
HYUNDAI H-LED19V5
General repair guidelines for TV LCD LED
Possible malfunctions
- HYUNDAI H-LED19V5 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.
With such manifestations, a malfunction is most likely to be detected in the K-40L1 power supply module. It is necessary to measure its output voltages and, if they are absent, check the serviceability of power switches (SW7N65) and rectifier diodes in the converters for possible breakdown.
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 with a 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.
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 controllers OB5269CP, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, 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. 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 check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 471-01A2-61703G 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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: MST6M182VG-T7S, SPI Flash: 25Q32. Defective components should be replaced.
Before replacing the KTDANW-14-09 tuner, if there is no tuning to 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
Once again, remind users! Attempts to self-repair a HYUNDAI H-LED19V5 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
To reduce the backlight current in LED drivers with a PWM controller MP3389EF (MP3389), or its analogue OB3362VP (28 pin), it is necessary to proportionally increase the total resistance of the resistors from pin 9 (ISET) to the chassis. The maximum current in each of the 12 channels (in milliamps) for the resistance Rset (in kilo-ohms) is determined from the ratio 1000 * 1.22V / Rset. With a parallel connection of channels, currents are summed.Repair MainBoard
The appearance of the MainBoard 471-01A2-61703G is shown in the figure below:
471-01A2-61703G
The appearance of the power supply
Main features of the HYUNDAI H-LED19V5 device:
Installed matrix (LED-panel) LM185WH2 (TL).
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3389EF PWM controller. As power elements of the LED driver, keys of the type ME4436 are used.
The necessary supply voltages for all nodes of the HYUNDAI H-LED19V5 TV are generated by the K-40L1 power module, or its analogs using OB5269CP microcircuits and power switches of the SW7N65 type.
MainBoard - main board (motherboard) It is a 471-01A2-61703G module using CPU chips: MST6M182VG-T7S, SPI Flash: 25Q32 and others.
The KTDANW-14-09 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LM185WH2-TLE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.1 / 3.9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 11S2P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
