Technical description and composition of the LG 47LB580V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LB580V
Chassis / Version: LE46B / LD46B
Panel: LC470DUE (FG) (A4)
LED backlight: LG INNOTEC DRT 3.0 47_A type Rev02_140218; DRT 3.0 47_B type Rev02_140218
T-CON: 6870C-0481A
LED driver (backlight): integrated into PSU; 117V 230mA (47 inch)
PWM LED driver: BL0202B
MOSFET LED driver: AP9561AGH
Power Supply (PSU): EAX65423801 (2.2)
PWM Power: MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down)
MOSFET Power: MMP60R580P, MMP60R360P, MBRF20100CTP, MDD7N25
MainBoard: EAX65610905 (.0), EBR78668701, SAA36861577, SAA36823111
Tuner: TDJM-G101D
Control: AKB73756559; Wi-Fi Module EAT61813901 TWFM-B006D BEJTWFMB006D
Specifications 47LB580V
LG 47LB580V
General repair guidelines for TV LCD LED
If the EAX65423801 power supply module (2.2) fails, the external manifestations may be different, for example, the LG 47LB580V does not turn on at all and there is no indication of the control lights on the front panel. 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.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the MAP8800 PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuit.
If, when you turn on the TV, the image appears and immediately disappears, or is missing initially when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter for the LC470DUE (FG) panel backlight assembly (A4)).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
In cases of attempts to repair the motherboard EAX65610905 (.0), EBR78668701, SAA36861577, SAA36823111, 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.
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 supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Remember! Attempts at self-repair by users of the LG 47LB580V TV set without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram --------------> LG 47LB580V Chassis LD46B.
CHASSIS : LD46B; MODEL : 47LB58**, 47LB58**-Z*, 47LB580V, 47LB580V-TA
The appearance of the MainBoard EAX65610905 is shown in the figure below:EAX65610905
EAX65610905 can be used in TVs:
LG 47LB580V (Panel LC470DUE (FG)(A4)), LG 42LB572V (Panel LC420DUE (FG)(A4)), LG 32LF580U 32LF580U-ZA.ARUWLDU (Panel NC320DXN VSBP5), LG 32LB572U (Panel NC320DXN VSBP2).
PSU Advanced
The 47LB580V model uses the EAX65423801 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the MAP8800 PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device LG 47LB580V:
Installed matrix (LED-panel) LC470DUE (FG) (A4).
The matrix control uses the Timing Controller (T-CON) 6870C-0481A.
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 47LB580V TV are generated by the EAX65423801 power supply module or its analogs using MAP8800 (PFC), FA6A01N (PWM Resonant), NR134S (PWM Step-down) microcircuits, and power switches of the MMP60R580P, MMP60R360725PN, MBMPFRR6060, MBMPRFD, MBMPRFD, MDFRR2015PN, MBMPRF201, and MPMPFRR6060N25 .
MainBoard - the main board (motherboard) is an EAX65610905 module.
The TDJM-G101D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC470DUE-FGA4
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 9 (G to G)
Frequency: 60Hz
Lamp Type: WLED
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V