Technical description and composition of the LG 47LB673V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LB673V
Chassis / Version: LC42B / LD42B / LE42B
Panel: LC470DUH (PG) (F1)
T-CON: integrated into MainBoard
LED driver (backlight): integrated into PSU
PWM LED driver: iW7025-00
Power Supply (PSU): EAX65424001 (2.2) - LGP42-14LPB
PWM Power: NCP1034DG, MAP8800 (PFC), ICE3BR4765JZ
MainBoard: EAX65384003 (1.2)
IC MainBoard: H5TQ2G63FFR, H5TQ4G63AFR, SAA37219517M, SAA36900716, Audio: NTP7514, TPS65175B, TPA6138, SN1302001, RTL8201F, TPS53513
Tuner: TDJM-G101D EBL1400501
Specifications 47LB673V
LG 47LB673V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 47LB673V does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the EAX65424001 module, is faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) NCP1034DG, MAP8800 (PFC), ICE3BR4765JZ, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction 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.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the EAX65384003 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements H5TQ2G63FFR, H5TQ4G63AFR, SAA37219517M, SAA36900716, Audio: NTP7514, TPS65175B, TPA6138, SN1302001, RTL8201F, TPS53513 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Malfunction of the TDJM-G101D EBL1400501 tuner 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.
CHASSIS : LD42B; MODEL : 47LB67**, 47LB67**-Z*, 47LB700V, 47LB700V-ZGOnce again, remind users! Attempts to self-repair the LG 47LB673V TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram ---------------> LG 47LB673V Chassis LD42B.
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)).
The appearance of the power supply
Main features of the device LG 47LB673V:
Installed matrix (LED-panel) LC470DUH (PG) (F1).
The matrix control uses the Timing Controller (T-CON) integrated.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the iW7025-00 PWM controller.
The necessary supply voltages for all nodes of the LG 47LB673V TV are generated by the EAX65424001 power module or its analogs using NCP1034DG, MAP8800 (PFC), ICE3BR4765JZ microcircuits.
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.
Additional technical information about the panel:
Brand: LG Display
Model: LC470DUH-PGF1
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 (Haze 1%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 1.06B (8-bit + Dithering), CIE1931 72%
Response Time: 8/10 (Tr / Td)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: EPI, 100 pins
Voltage: 12.0V