Technical description and composition of the HYUNDAI H-LED22V4 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: H-LED22V4
Chassis / Version: 471-01A2-T7601G
Panel: LTM230HT05
MainBoard: 471-01A2-T7601G
IC MainBoard: MST6M16JS-LF, EON25F16, W9412G6JH-4, 24C64, SA7454,
Tuner: F21CT-2BK-E
Appearance
HYUNDAI H-LED22V4
General repair guidelines for TV LCD LED
Repair of the HYUNDAI H-LED22V4 TV should begin with a careful external examination of all its components and modules. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In case of a power supply module malfunction, external manifestations may be different, for example, the HYUNDAI H-LED22V4 does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If the HYUNDAI H-LED22V4 does not have an image, but there is sound, the backlight LEDs of the LTM230HT05 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
The motherboard 471-01A2-T7601G must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MST6M16JS-LF, EON25F16, W9412G6JH-4, 24C64, SA7454, with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The malfunction of the tuner F21CT-2BK-E is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Main MST6M16 (KTC) CPU MST6M16GS-F
The appearance of the MainBoard 471-01A2-T7601G is shown in the figure below:
As part of the 471-01A2-T7601G motherboard, an MST6M16JS processor combined with a scaler, DDR WINBOND W9412G6JH-4 RAM and an SPI FLASH 2Mb ROM are used.HAIER L24F6 (Panel V236H1-L01), HYUNDAI H-LED22V4 (Panel LTM230HT05), ROLSEN RL-19L1002U (Panel LM185WH2-TL A1), RUBIN RB-22SL1F (Panel LTM230HT01).
It is advisable to start this type of MainBoard repair by checking the voltage converters and linear stabilizers necessary to provide power to the processor nodes, RAM, ROM, and standby mode. Check the power supply of the 5V or 12V LCD panel, depending on the type of panel used, it is advisable directly on the LVDS connector. If, in the presence of the necessary supply voltage, the TV does not exit Stand-by mode, does not respond to the remote control and control buttons, the SPI Flash software should be updated.
471-01A2-T7601G can be used in TVs:
HAIER L24F6 (Panel V236H1-L01), HYUNDAI H-LED22V4 (Panel LTM230HT05), ROLSEN RL-19L1002U (Panel LM185WH2-TL A1), RUBIN RB-22SL1F (Panel LTM230HT01).
Main features of the HYUNDAI H-LED22V4 device:
Installed matrix (LED-panel) LTM230HT05.
The required supply voltage for all nodes of the HYUNDAI H-LED22V4 TV provides a switching power supply.
MainBoard - the main board (motherboard) is a 471-01A2-T7601G module, using MST6M16JS-LF, EON25F16, W9412G6JH-4, 24C64, SA7454, and others.
The F21CT-2BK-E tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM230HT05-V
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.76x286.74 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: 17S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V