Technical description and composition of the LG 47LB650V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LB650V ZE
Chassis / Version: LD42B
Panel: LC470DUH (FG) (P2)
LED driver (backlight): integrated into PSU; 117V 230mA (47 inch)
PWM LED driver: BL0202B
MOSFET LED driver: AP9561AGH
Power Supply (PSU): EAX65423801 (2.1)
PWM Power: MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down)
MOSFET Power: MMP60R580P, MMP60R360P, MBRF20100CTP
MainBoard: EAX65384003 (1.2) // EAX65384004 (1.5)
IC MainBoard: H5TQ2G63FFR, H5TQ4G63AFR, SAA37219517M, SAA36900716, Audio: NTP7514, TPS65175B, TPA6138, SN1302001, RTL8201F, TPS53513
Tuner: TDJM-G101D EBL1400501
Control: AKB73756565 Remote: AN-MR500
Specifications 47LB650V
LG 47LB650V
General repair guidelines for TV LCD LED
An external examination of the external and internal elements should be carried out in a timely manner before the start of operations for their dismantling. 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. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
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. 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.
A breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If, when you turn on the TV, the image appears and immediately disappears, or is absent initially when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (LC470DUH (FG) (P2) panel LED backlight power converter).
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 diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
In cases of attempts to repair the motherboard EAX65384003 (1.2), it is necessary to check the operation of linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - H5TQ2G63FFR, H5TQ4G63AFR, SAA37219517M, SAA36900716, Audio: NTP7514, TPS65175B, TPA6138, SN1302001, RTL8201F, TPS53513 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).
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the tuner TDJM-G101D EBL1400501 and update the software.
Attention! For users and owners of 47LB650V TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual and schematic diagram --------------> LG CHASSIS LD42B MODEL: 47LB65** 47LB65**-Z*
PSU EAX65423801(2.1) - MAP8800, MMP60R580P x 2, FA6A01N, MMP60R360P x 2, NR134S (PWM Step-down), MBRF20100CTP x 2, BL0202B (Led Drive) , MMP60R580P, AP9561AGH x 2, MDD7N25
The appearance of the MainBoard EAX65384003 is shown in the figure below:EAX65384003
EAX65384003 can be used in TVs:
LG 47LB650V ZE (Panel LC470DUH (FG) (P2)), LG 42LB631V ZL (Panel LC420DUH (FG) (A1)), LG 39LB650V (Panel T390HVJ01.2), LG 55LB673V ZB (Panel LC550DUH (PG)(F1)), LG 47LB677V (Panel LC470DUH (FG)(F1)), LG 42LB673V (Panel LC420DUH (PG)(F1)), LG 47LB673V (Panel LC470DUH (PG)(F1)), LG 32LB652V 32LB652V-ZA.BRUWLDU (Panel LC320DUH (FG)(P2)), LG 50LB653V (Panel LC500DUH (FG)(P1)), LG 42LB652V 42LB652V-ZA.BRUWLJU (Panel LC420DUH (FG)(P2)), LG 55LB720V 55LB720V-ZG.BRUWLJU (Panel LC550DUH (PG)(F1)).
PSU Advanced
On the 47LB650V TV, the EAX65423801 power module is installed using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the MAP8800 PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the device LG 47LB650V:
Installed matrix (LED panel) LC470DUH (FG) (P2).
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the BL0202B PWM controller. As power elements of the LED driver, keys of the type AP9561AGH are used.
The necessary supply voltages for all nodes of the LG 47LB650V TV are generated by the EAX65423801 power supply module or its analogs using the MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down) microcircuits and power switches of the MMP60R580P, MMP60R360PTP, MB type.
MainBoard - the main board (motherboard) is an EAX65384003 module, with the use of H5TQ2G63FFR, H5TQ4G63AFR, SAA37219517M, SAA36900716, Audio: NTP7514, TPS65175B, TPA6138, SN1302001, RTL8201F, TPS5.
Tuner TDJM-G101D EBL1400501 provides the reception of television programs and tuning to channels.