Technical description and composition of the LG M2352T TV, panel type and applicable modules. The composition of the modules.LG LED
Model: M2352T PZN
Chassis / Version: LD02M
Panel: LM230WF3 (SL) (E1)
LED driver (backlight): with integrated MainBoard
PWM LED driver: DT1641S
Power Supply (PSU): Adapter 19V 2.53A
PWM Power: IC_Power
MainBoard: EAX64559005 (1.0) AGF76482811
IC MainBoard: LGE2111A-TB APHF935ZC, H5TQ1G63DFA
Tuner: TDSN-G301D EBL61080001
Control: AKB73655822
Technical Specifications M2352T
LG M2352T
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG M2352T TV does not turn on, and generally does not show any signs of operability. The control buttons and the remote control does not respond.
With such manifestations, a malfunction may be detected in the power module.
The external adapter 19V 2.53A power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure the secondary output voltages, and if they are absent, check the operability of the power switches of the converter and rectifier diodes for a short circuit probability.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key can be a PWM controller (PWM), which is checked by replacing a known-good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the EAX64559005 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips LGE2111A-TB APHF935ZC, H5TQ1G63DFA and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the TDSN-G301D EBL61080001 tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a TV LG M2352T without the appropriate qualifications and the necessary experience can lead to its complete unrepairability!
Service manual / schematic diagram -------------> LG M2352T Chassis LD02M
Model: M2352D, M2352D-PZN, M2352D-PRN; Chassis LD02M
To reduce the backlight current in LED drivers with the 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 M2352T:
Installed matrix (LED-panel) LM230WF3 (SL) (E1).
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 M2352T TV, an external adapter type 19V 2.53A is used using IC_Power chips.
MainBoard - the main board (motherboard) is an EAX64559005 module, using LGE2111A-TB APHF935ZC, H5TQ1G63DFA and other chips.
The TDSN-G301D EBL61080001 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LM230WF3-SLE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 509.184x286.416 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 14 (G to G)
Frequency: 60Hz
Lamp Type: 17S2P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
