Technical description and composition of the LG 47LM860V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LM860V
Chassis / Version: LD23E
Panel: LC470EUH (PE) (F1)
LED backlight: 6922L-0021A 7030
T-CON: EAX64583702-1.0
LED driver (backlight): integrated into PSU
PWM LED driver: R5F100BCAFP, AAT2430AISX
MOSFET LED driver: PHT4Q10LT
Power Supply (PSU): EAX64744101 (1.3) EAY62512702 LGP4247H-12LPB-3P
PWM Power: STR-A6059 (Standby), L6599D, HS01G (PFC)
MOSFET Power: K10A60D, 13NM60V
MainBoard: EAX64503907 (1.0) EBT62052202
IC MainBoard: CPU: LG1152D-B1; Scaler: SII9587CNUC; SOUND: NTP-7500L
Tuner: TDSQ-G351D
Specifications 47LM860V
LG 47LM860V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 47LM860V TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Typically, with such manifestations, the defect is caused by faulty elements in the EAX64744101 main power module. It is necessary to measure its output voltages, and if they are absent (full or partial), the power switches (K10A60D, 13NM60V) of the converters and rectifier diodes should be checked for possible short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) STR-A6059 (Standby), L6599D, HS01G (PFC), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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 EAX64503907 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: LG1152D-B1; Scaler: SII9587CNUC; SOUND: NTP-7500L and failed chips should be replaced 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.
If the TV works normally from external devices, but does not tune into television channels, the TDSQ-G351D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
TV users and owners need to remember that attempts to self-repair an LG 47LM860V TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual / schematic diagram ----------------> LG 47LM860V Chassis .
psu schematic diagram ----------------> LGP4247H-12LPB-3P EAY62512702 EAX64744101 PLDF-L101B
To reduce the backlight current in LED drivers with the AAT2430AISX controller, increase the resistance of the resistor from terminal 50 (ISET) to the housing, for example, from 3 KOhm to 4.7 KOhm. Currents will proportionally decrease in each of the 16 channels. With a parallel connection of channels, currents are summed.
The appearance of the MainBoard EAX64503907 is shown in the figure below:EAX64503907
The appearance of the power supply
Main features of the device LG 47LM860V:
Installed matrix (LED-panel) LC470EUH (PE) (F1).
The matrix control uses the Timing Controller (T-CON) EAX64583702-1.0.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller R5F100BCAFP, AAT2430AISX. As power elements of the LED driver, keys of the PHT4Q10LT type are used.
The necessary supply voltages for all nodes of the LG 47LM860V TV are generated by the EAX64744101 power supply module or its analogs using the STR-A6059 (Standby), L6599D, HS01G (PFC) microcircuits and power switches of the type K10A60D, 13NM60V.
MainBoard - the main board (motherboard) is an EAX64503907 module, using CPU chips: LG1152D-B1; Scaler: SII9587CNUC; SOUND: NTP-7500L and others.
The TDSQ-G351D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC470EUH-PEF1
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 1%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/10 (Tr / Td)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: EPI, 100 pins
Voltage: 12.0V
