Technical description and composition of the LG 32LB561U TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LB561U
Chassis / Version: LC43B / LB43D / LB43T
Panel: NC320DXN VSBP1
T-CON: BD8174MU, BM9098
LED driver (backlight): integrated into PSU; 117V, 250mA
PWM LED driver: SSC1S311, A27RAW (sot-26)
MOSFET LED driver: STD11N65M5, STN4NF20L
Power Supply (PSU): LGP32-14PL1 EAX65391401
PWM Power: NCP1251 (PWM SOT23-6 5A2R ..), NR134S (Step-Down)
MOSFET Power: KP8N65
MainBoard: EAX65388006 (1.0) // EAX65388005 (1.0)
IC MainBoard: CPU: LGE2132; SPI Flash: MX25L8005; SOUND: TAS5733
Tuner: TDJM-G101D
Control: IR: EBR78925201
Specifications 32LB561U
LG 32LB561U
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular LG 32LB561U, it is advisable to start with a careful external examination of internal and external elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the LG 32LB561U has no picture, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the NC320DXN panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
In case of breaks in the LED circuit, a complete disassembly of the panel is required, the LEDs are checked for an open circuit, as well as the reliability of the connections in the connectors and rations of the terminals.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Before changing the tuner TDJM-G101D, if it is not possible to tune to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness.
Once again, remind users! Attempts at self-repair of the LG 32LB561U TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC MANUAL ---------------------> LG Chassis LC43B
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.
More details on this page
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 32LB561U:
Installed matrix (LED-panel) NC320DXN VSBP1.
The matrix control uses the Timing Controller (T-CON) BD8174MU.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller SSC1S311, A27RAW (sot-26). 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 32LB561U TV are generated by the LGP32-14PL1 power module or its analogs using NCP1251 (PWM SOT23-6 5A2R ..), NR134S (Step-Down) microcircuits and KP8N65 type power switches.
MainBoard - the main board (motherboard) is an EAX65388006 module, using CPU chips: LGE2132; SPI Flash: MX25L8005; SOUND: TAS5733 and others.
The TDJM-G101D tuner provides television reception and channel tuning.
Information from an alternative source:
LG 32LB561U-ZE Chassis LD43B
Panel Type (Matrix): NC320DXN
Motherboard: EAX65388003 (1.0), Tuner: TDJM-G101D EBL6140501
PSU: EAX65391401 (2.8)
Remote control: AKB73715679