Technical description and composition of the LG 32LE4500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LE4500 ZA
Chassis / Version: LD01D
Panel: T315HW05 V.3
LED backlight: 73.31T12.001-2-CS1, 73.31T12.002-2-CS1
T-CON: T370HW04 V4 CTRL BD 37T06-C01
LED driver (backlight): T370HW04 V0 LED Driver BD. 37T06-D04
PWM LED driver: HV9982
MOSFET LED driver: P3506DD, 18N20GS, P2504BDG
Power Supply (PSU): LGP3237-10Y P / N: EAY61770201
PWM Power: VIPER27L (Standby), SG6961 (PFC), L6599
MOSFET Power: 13NM60N (PFC), 04N60C3
MainBoard: EAX61766102 (0)
IC MainBoard: CPU: LGE107D, Nand: HY27UF082G2B, SPI Flash: Winb25Q80, Audio: NTP7100
Tuner: TDTJ-S001D - EBL60721201
Control: AKB72914209
Specifications 32LE4500
LG 32LE4500
General repair guidelines for TV LCD LED
Sometimes the LG 32LE4500 TV just doesn’t turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the general power module LGP3237-10Y P / N: EAY61770201. If it is working properly, you must check the standby batteries on the Main Board. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the converter 13NM60N (PFC), 04N60C3 The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the VIPER27L PWM controller (Standby), SG6961 (PFC), L6599 or breakage of resistors in its harness.
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 T315HW05 V.3 panel illumination unit).
To check the health of the LEDs, as well as contact connections in the ruler circuit, the panel must be disassembled.
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. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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.
If the EAX61766102 (0) motherboard is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: LGE107D, Nand: HY27UF082G2B, SPI Flash: Winb25Q80, Audio: NTP7100 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner TDTJ-S001D - EBL60721201, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of the LG 32LE4500 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC MANUAL ----> LG 42LE4500, 42LE4500-ZA, 42LE4508, 42LE4508-ZA, 42LE450N, 42LE450N-ZA
Chassis LD01D
The appearance of the MainBoard EAX61766102 is shown in the figure below:
EAX61766102
EAX61766102 can be used in TVs:
LG 42LE4500 ZA (Panel LC420EUG), LG 42LE4508 ZA (Panel T420HW07 V.5), LG 37LE5300 (Panel LC370EUH (SC)(A1)), LG 32LE4500 ZA (Panel T315HW05 V.3), LG 32LE5300 ZA (Panel T315HW05 V.1), LG 32LE3300 32LE3300-ZA.BRUWLJU (Panel LC320EXN (SC)(A1)), LG 37LE4500 37LE4500-ZA (Panel T370HW04 V.4 ), LG 32LE5450 -ZA (Panel LC320EUH (SC)(A1)).
PSU Advanced
The LGP3237-10Y power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the SG6961 PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device LG 32LE4500:
Installed matrix (LED-panel) T315HW05 V.3.
The matrix control uses the Timing Controller (T-CON) T370HW04.
To power the backlight LEDs, the T370HW04 LED driver is used, controlled by the HV9982 PWM controller. As the power elements of the LED driver, keys of the type P3506DD, 18N20GS, P2504BDG are used.
The necessary supply voltages for all nodes of the LG 32LE4500 TV are generated by the LGP3237-10Y power supply module or its analogs using VIPER27L (Standby), SG6961 (PFC), L6599 microcircuits and power switches of the 13NM60N (PFC), 04N60C3 type.
MainBoard - the main board (motherboard) is an EAX61766102 module, using CPU chips: LGE107D, Nand: HY27UF082G2B, SPI Flash: Winb25Q80, Audio: NTP7100 and others.
Tuner TDTJ-S001D - EBL60721201 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T315HW05 V3
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 strings WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V