Technical description and composition of the LG 19LE3400 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 19LE3400
Chassis / Version: LD01A
Panel: LC185EXN SC A1
LED backlight: Edge LED
T-CON: 6870S-1063A
LED driver (backlight): 6870S-1063A (Combined with T-CON)
Power Supply (PSU): Adapter 24V 4A
MainBoard: EAX61524501
IC MainBoard: CPU: LGE107D; DRAM: H5TQ1G63BFR-12C; NAND Flash: HY27UF082G2B; SPI Flash: MX25L8005M2I-15G; EEPROM: CAT24WC08W;
Tuner: TDFR-C035D
Specifications 19LE3400
LG 19LE3400
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the LG 19LE3400 TV, it is advisable to start with an external examination of its external and internal elements. 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.
In the absence of any signs of operability, when the LG 19LE3400 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV adapter24V 4A power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
Sometimes the LG 19LE3400 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 converter for the backlight LEDs of the LC185EXN SC A1 panel, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
Attention to the owners! Attempts at self-repair of the LG 19LE3400 TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC MANUAL -------------> LG 19LE3300/3380-ZA, 19LE330N/3400 19LE330N/3400-ZA, 19LE3310 19LE3310-ZB Chassis LD01A
MATRIX LC185EXN (SC)(A1) LG Panel specification LC185EXN (SC)(A1)
The appearance of the MainBoard EAX61524501 is shown in the figure below:EAX61524501
EAX61524501 can be used in TVs:
LG 19LE3400 (Panel LC185EXN SC A1), LG 19LE3300 (Panel LC185EXN (SC)(A1)), LG 22LE3300 ZA (Panel LC216EXN (SC)(A1)), LG 19LD350 (Panel M185B1-L02).
Main features of the device LG 19LE3400:
Installed matrix (LED panel) LC185EXN SC A1.
The matrix control uses the Timing Controller (T-CON) 6870S-1063A.
The LED driver 6870S-1063A is used to power the backlight LEDs.
To power all the internal components of the LG 19LE3400 TV, an external adapter type 24V 4A is used.
MainBoard - the main board (motherboard) is an EAX61524501 module, using CPU chips: LGE107D; DRAM: H5TQ1G63BFR-12C; NAND Flash: HY27UF082G2B; SPI Flash: MX25L8005M2I-15G; EEPROM: CAT24WC08W; and others.
The TDFR-C035D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC185EXN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Dithering), CIE1931 68%
Response Time: 9 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V