Technical description and composition of the LG M2432D TV, panel type and applicable modules. The composition of the modules.LG LED
Model: M2432D
Chassis / Version: LD02M
Panel: M236HGE-L20 Rev. C1
T-CON: M236HGE-L20-X + C
LED driver (backlight): integrated into MainBoard
PWM LED driver: DT1641S
Power Supply (PSU): Adapter 19V 2.1A
MainBoard: EAX64559005 (1.0)
IC MainBoard: LGE2111A-T8, 25Q80BVSIG, H5TQ1G63DFR, TJ4220C
Tuner: TDSS-G101D EBL1060001
Technical Specifications M2432D
LG M2432D
General repair guidelines for TV LCD LED
Malfunctions of the adapter 19V 2.1A power supply module can be expressed in different ways, for example, the LG M2432D does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. 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.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter for the panel backlight unit M236HGE-L20 Rev. C1).
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 is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
If the motherboard EAX64559005 (1.0) is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - LGE2111A-T8, 25Q80BVSIG, H5TQ1G63DFR, TJ4220C with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the TDSS-G101D EBL1060001 tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Remember! Attempts at self-repair by users of the LG M2432D TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
To reduce the backlight current in LED drivers with a DT1641AS controller (DT1641S), you can increase the total resistance of the resistors from pin 7 (RISET) to the chassis. The exact proportional dependence may not be observed if there is additional control on this input, then the ratings should be selected empirically.
More details on this page
The appearance of the MainBoard EAX64559005 is shown in the figure below:EAX64559005
EAX64559005 can be used in TVs:
LG M2432D (Panel M236HGE-L20 Rev.C1), LG M2352T PZN (Panel LM230WF3 (SL)(E1)), LG M2232D (Panel LM215WF-4).
Main features of the device LG M2432D:
Installed matrix (LED panel) M236HGE-L20 Rev. C1.
The matrix control uses the Timing Controller (T-CON) M236HGE-L20-X + C.
To power the backlight LEDs, a converter is used, combined with the EAX64559005 main board, controlled by the DT1641S PWM controller.
To power all the internal components of the LG M2432D TV, an external adapter type 19V 2.1A is used.
MainBoard - the main board (motherboard) is an EAX64559005 module, using chips LGE2111A-T8, 25Q80BVSIG, H5TQ1G63DFR, TJ4220C and others.
Tuner TDSS-G101D EBL1060001 provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG M2432D-PZN Chassis LD02M
Panel Type (Matrix): M236HGE-L20 Rev. C1
Motherboard: EAX64559005 (1.0), LGE2111A-T8, 25Q80BVSIG, H5TQ1G63DFR x2, TJ4220C, Tuner: TDSS-G101D EBL1060001
T-con: M236HGE-L20-X + C, POWER: DC 19V; 2.1A
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: M236HGE-L20
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
