Technical description and composition of the HYUNDAI H-LCD1702 TV, panel type and applicable modules. The composition of the modules.Hyundai
Model: H-LCD1702
Chassis / Version: HLT-1751
Panel: 1280x1024
Inverter (backlight): BL1704021
Power Supply (PSU): Adapter H-LCD1702
PWM Power: AC1501, LX8385-33CDD, MP1018
MOSFET Power: SDM9926
MainBoard: 782-L17H3S-010A
IC MainBoard: VCT3833F, MSP3410G, TDA7268
Technical Specifications H-LCD1702
HYUNDAI H-LCD1702
General recommendations for repairing TV LCD
It is advisable to start the diagnosis of a malfunction of the HYUNDAI H-LCD1702 TV, like all others, with an external examination of possible changes, both external and internal elements. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Sometimes the HYUNDAI H-LCD1702 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the AC adapter H-LCD1702 common power module. When diagnosing and repairing the AC adapter H-LCD1702 power supply, first of all, it is necessary to check the fuse, and if it breaks, the power switch SDM9926 and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip AC1501, LX8385-33CDD, MP1018 can also cause a breakdown of the power switch of the converter.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If the HYUNDAI H-LCD1702 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
When repairing the BL1704021 inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, in the event of a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
When repairing an MB board, you must check its components VCT3833F MSP3410G TDA7268. Defective items should be replaced.
For owners of the H-LCD1702 TV, we recommend that you contact qualified personnel with experience to repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> HYUNDAI H-LCD1702 Chassis HLT-1751,HLT-2051
Main features of the device HYUNDAI H-LCD1702:
Installed matrix (LCD-panel) 1280x1024.
To power the backlight used inverter BL1704021.
To power all the internal nodes of the HYUNDAI H-LCD1702 TV, an external adapter type H-LCD1702 is used with the use of AC1501, LX8385-33CDD, MP1018 microcircuits and SDM9926 type power switches.
MainBoard - the main board (motherboard) is a 782-L17H3S-010A module, using VCT3833F, MSP3410G, TDA7268 and others.
Brand: HYUNDAI, Model: H-LCD1702.
Briefly from the TV: LCD, 17 ", 1280x1024, sound: 6 watts.
The composition uses MainBoard 782-L17H3S-010A and an LCD panel (matrix) 1280x1024.
Power supply unit external Adapter H-LCD1702.
HYUNDAI H-LCD1702 TV with an LCD display of 1280x1024, a diagonal size of 17 "in a 5: 4 format. The brightness of the screen is 500 cd / m² using CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 500: 1 The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC.
The power of the acoustic system of sound 6 W (2x3W) 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, RGB, VGA. An output for connecting headphones is provided.
Overall dimensions: 532x819x139 mm.
Attention! The HYUNDAI H-LCD1702 LCD TV panel 1280x1024 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!