Technical description and composition of the LG 32LB563U TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LB563U
Chassis / Version: LC43B / LD43B / LB43T
Panel: NC320DXN VSBP1
LED backlight: 6916L-2223A, 916L-2224A, 6920L-0418D, 6920L-0419D
T-CON: CPWBX5409TP ZD
LED driver (backlight): integrated into PSU; 117V, 250mA
PWM LED driver: SSC1S311, A27RAE (sot23-6)
MOSFET LED driver: STD11N65M5, STN4NF20L
Power Supply (PSU): LGP32-14PL1 PLDC-L306A EAX65391401
PWM Power: NCP1251, NR134S
MOSFET Power: KP8N65
MainBoard: EAX65388006 (1.0)
IC MainBoard: CPU: LGE2134, SPI FLASH MX25L8005, TPS65282;
Tuner: TDJM-G101D
Control: Remote: AKB73715679
Specifications 32LB563U
LG 32LB563U
General repair guidelines for TV LCD LED
Repair of the LG 32LB563U TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. A visible physical change in some components can sometimes suggest a further troubleshooting direction. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, and there is not the slightest sign of operability - the most likely malfunction is in the power module. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when turned on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (NC320DXN VSBP1 panel LED backlight power converter).
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Repair or diagnostics of the EAX65388006 (1.0) motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: LGE2134, SPI FLASH MX25L8005, TPS65282. BGA chip malfunctions are usually easy to detect by warming up.
If a TDJM-G101D tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels at the corresponding terminals of the tuner.
It should be remembered! Attempts to repair the LG 32LB563U TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual and schematic diagram -------> LG CHASSIS LB43T MODEL: 32LB561D/561T/563D/563T
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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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 32LB563U:
Installed matrix (LED-panel) NC320DXN VSBP1.
The matrix control uses the Timing Controller (T-CON) CPWBX5409TP.
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 power elements of the LED driver, keys of the type STD11N65M5, STN4NF20L are used.
The necessary supply voltages for all nodes of the LG 32LB563U 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 CPU chips: LGE2134, SPI FLASH MX25L8005, TPS65282; and others.
The TDJM-G101D tuner provides television reception and channel tuning.