Technical description and composition of the HYUNDAI H-LCD1915 TV, panel type and applicable modules. The composition of the modules.Hyundai
Model: H-LCD1915
Chassis / Version: MST739
Panel: CLAA185WT01
MainBoard: MST739 KL19NS62-Z-01C
IC MainBoard: CPU: MST739KE-LF, FLASH: 25Q80
Tuner: AFT1 / 3100G
Technical Specifications H-LCD1915
HYUNDAI H-LCD1915
General recommendations for repairing TV LCD
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should inspect all the internal elements of the MST739 chassis, as well as the external chassis. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the HYUNDAI H-LCD1915 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
Sometimes the HYUNDAI H-LCD1915 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit). When diagnosing a malfunction of the inverter with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
On the MST739 KL19NS62-Z-01C motherboard, in case of a malfunction, you should first check the operation of all stabilizers or power converters of the microcircuits and, if necessary, update the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MST739KE-LF, FLASH: 25Q80 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
It should be remembered! Attempts to repair the HYUNDAI H-LCD1915 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!
FIRMWARE FOR SPI FLASH -----------> HYUNDAI H-LCD1915, Main: MST739, Panel CLAA185WT01
In the event of a failure in the software of the SPI FLASH chip from Winbond, we recommend that you replace it with a new one. Sometimes faulty SPI Winbond microcircuits can be restored for a while after a soldering station is heated by a hairdryer. Usually this is enough to read its contents.
Repair MainBoardThe appearance of the MainBoard MST739 is shown in the figure below:
MST739
Main features of the HYUNDAI H-LCD1915 device:
Installed matrix (LCD panel) CLAA185WT01.
The required supply voltage for all nodes of the HYUNDAI H-LCD1915 TV provides a switching power supply.
MainBoard - the main board (motherboard) is an MST739 module, using CPU chips: MST739KE-LF, FLASH: 25Q80 and others.
The AFT1 / 3100G tuner provides television reception and channel tuning.
HYUNDAI H-LCD1915 TV with CLAA185WT01 LCD, diagonal size 19 "(48 cm) in 16: 9 format. Screen brightness of 300 cd / m² is ensured by backlighting with CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. 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). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in st andarts 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 4 W (2x2 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), AV, S-Video, component, VGA, HDMI. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: 461x351x209 mm.
The mass of the TV: 5.2 kg.
Attention! The HYUNDAI H-LCD1915 LCD TV panel CLAA185WT01 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!