Technical description and composition of the LG 32LB563V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LB563V
Chassis / Version: LC43B / LD43B / LB43T
Panel: LC320DUE (FG) (A3)
LED backlight: 6916L-1974A LG Innotek DRT 3.0 32_A TYPE REV0.2
T-CON: LC320DUE-VGM1 V05 6870C-0488A
LED driver (backlight): integrated into PSU; 117V, 250mA
PWM LED driver: SSC1S311, A27RAE (sot23-6)
MOSFET LED driver: STD11N65M5, MDHT4N20Y
Power Supply (PSU): LGP32-14PL1 EAX65391401
PWM Power: NCP1251, NR134S
MOSFET Power: KP8N65
MainBoard: EAX65388006 (1.0)
IC MainBoard: LGE2131, A7MKN51C, H27U1G8F2CTR, 25L8006E, H5TQ1G63EFR, TAS5733, LCX244, A8303, 4580M-E1, TPS65282
Tuner: TDJM-G101D
Control: Remote: MKJ32022835, IR: EBR39300401 EAX35731602
Specifications 32LB563V
LG 32LB563V
General repair guidelines for TV LCD LED
If the LG 32LB563V does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the LGP32-14PL1 power module. In some cases, only the processor power regulator may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
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. PWM chip SC1S311, NCP1251 from the manufacturer is possible.
If the LG 32LB563V TV does not have an image, but there is sound, there may be a malfunction in the backlight circuits of the LC320DUE (FG) LED panel (A3).
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
To open all transitions, several tens of volts or more are necessary, and it is best to use a current source for such purposes. A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. In the open panel, it is necessary to check each LED. If your multimeter cannot open the LED transitions in forward bias, then see the presence of the PN transition of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
On the EAX65388006 (1.0) motherboard, in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - LGE2131, A7MKN51C, H27U1G8F2CTR, 25L8006E, H5TQ1G63EFR, TAS5733, LCX244, A8303, 4580M-E1, TPS65282 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Malfunction of the tuner TDJM-G101D is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
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.One of the typical malfunctions of the LG 32LB563V often occurs in LED panels LG320DUE (FG) (A3) manufacturer LG.
External manifestations: there is no image, the backlight does not work. In most such cases, the LEDs turn out to be malfunctioning, which during testing turn out to be either in a cliff or with broken internal zener diodes.
LEDs must be replaced, and the maximum current from the driver should be limited to 10-20%.
You can reduce the backlight current in LG TVs with LGP32-14PL1 power supplies (EAX65391401) as follows. The current sensor consists of six resistors R816-R821 connected in parallel - 1 Ohm, 1 Ohm, 1 Ohm, 1 Ohm, 2 Ohm, 8.2 Ohm. The total resistance in this case will be 0.22 Ohm. If you remove one resistor 1 Ohm, the total resistance increases to 0.28 Ohm, the current decreases proportionally from 250 mA to about 190 mA.
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Service manual and schematic diagram -----------> LG CHASSIS LB43T MODEL: 32LB561D/561T/563D/563T
TV 32LB563V; EAX65388006 (1.0); EAX65391401 (3.0); NC320DUN VBBP1
LED: UOT DRT 3.0 32" REV0.9 (14.3.13) EAY62334001
The appearance of the MainBoard EAX65388006 is shown in the figure below:EAX65388006
EAX65388006 can be used in TVs:
LG 32LB561V (Panel LC320DUE), LG 32LB561U (Panel NC320DXN VSBP1), LG 42LB629V ZM (Panel LC420DUE (FG)(P2) ), LG 32LB563U (Panel NC320DXN VSBP1), LG 42LB552V ZA (Panel LC420DUE (FG)(A6)), LG 32LB552U (Panel NC320DXN-VSBP4), LG 32LB563V (Panel LC320DUE (FG)(A3)), LG 42LB561V ZE (Panel LC420DUE (FG)(A3)), LG 42LB569V 42LB569V-ZX.BRUWLDU (Panel LC420DUE (FG)(A3)).
The appearance of the power supply
Main features of the device LG 32LB563V:
Installed matrix (LED-panel) LC320DUE (FG) (A3).
The matrix control uses the Timing Controller (T-CON) LC320DUE-VGM1.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller SSC1S311, A27RAE (sot23-6). As the power elements of the LED driver, keys of the type STD11N65M5, MDHT4N20Y are used.
The necessary supply voltages for all nodes of the LG 32LB563V TV are generated by the LGP32-14PL1 power supply module or its analogs using NCP1251, NR134S microcircuits and KP8N65 type power switches.
MainBoard - the main board (motherboard) is an EAX65388006 module using LGE2131, A7MKN51C, H27U1G8F2CTR, 25L8006E, H5TQ1G63EFR, TAS5733, LCX244, A8303, 4580M-E1, TPS65282 and other chips.
The TDJM-G101D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320DUE-FGA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 65%
Response Time: 7 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V