Technical description and composition of the LG 47LW650S TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LW650S 47LW650S-ZC
Chassis / Version: LD12C
Panel: LC470EUF (SD) (F1)
LED backlight: 3660L-0393
T-CON: 6870C-0358A Ver1.0 Model: V6 32/42/47 FHD 120Hz
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX62865401 / 8 Rev 1.0 Model: LGP4247-115LBP
PWM Power: FAN7930B, 3BR4765JZ (Standby), L6599AD
MainBoard: EAX64405501 (0)
IC MainBoard: CPU: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, H5TQ1G63DFR
Tuner: TDFQ-G031D
Specifications 47LW650S
LG 47LW650S
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 47LW650S 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 such cases, the EAX62865401 power supply is usually faulty. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips FAN7930B, 3BR4765JZ (Standby), L6599AD are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
As a rule, in such cases there is no display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the EAX64405501 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, H5TQ1G63DFR and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TDFQ-G031D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention to users! Self-repair of the LG 47LW650S TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual / schematic diagram ----------------> LG 47LW650S Chassis LD12C
CHASSIS : LD12C, MODEL : 47LW650G, 47LW650S, 47LW650T, 47LW650W, 47LW650G, 47LW650S, 47LW650T, 47LW650W -ZC.
The appearance of the MainBoard EAX64405501 is shown in the figure below:EAX64405501
EAX64405501 can be used in TVs:
LG 42LW575S (Panel LC420EUF (SP)(PX) L), LG 32LW575S (Panel LC320EUD (SD)(P1)), LG 47LW575S (Panel LC470EUF (SD)(P1)), LG 47LW650S 47LW650S-ZC (Panel LC470EUF (SD)(F1) ).
The appearance of the power supply
Main features of the device LG 47LW650S:
Installed matrix (LED-panel) LC470EUF (SD) (F1).
The matrix control uses the Timing Controller (T-CON) 6870C-0358A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the LG 47LW650S TV are generated by the EAX62865401 power module or its analogs using FAN7930B, 3BR4765JZ (Standby), L6599AD microcircuits.
MainBoard - the main board (motherboard) is an EAX64405501 module, using CPU chips: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, H5TQ1G63DFR and others.
The TDFQ-G031D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC470EUF-SDF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 mm
Surface: Antiglare (Haze 10%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + FRC), CIE1931 72%
Response Time: 5.0 (G to G); 6.0 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V
