Technical description and composition of the LG 37LS560T TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 37LS560T
Chassis / Version: LD21B
Panel: LC370EUN (SE) (M2)
LED backlight: Led 37 V12 Edge REV1.1 6920L-0001C, 6916L1088A
T-CON: 6870C-0401B
LED driver (backlight): PPW-LE37SE-0, 6917L-0086A
Power Supply (PSU): EAX64405901 (1.6) - EAY62569601, PSLC-L111A LGP3237H-12P
MainBoard: EAX64317404 (1.0)
IC MainBoard: CPU: LGE2111A-T8, Nand: H27U1G8F2BTR, DDR: K4B1G1646G-BCK0, Spi: MX25L8006E
Tuner: TDSN-G301D
Control: AKB73655802; IR: EBR74986702, LM35-55, MB32B00, 1BF-3010B
Specifications 37LS560T
LG 37LS560T
General repair guidelines for TV LCD LED
In cases where the LG 37LS560T TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the EAX64405901 power supply module is most likely faulty (1.6) - EAY62569601, PSLC-L111A, LGP3237H-12P or there is no standby power. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the LG 37LS560T does not have an image, but there is sound, there may be a malfunction of the backlight LEDs of the LC370EUN (SE) (M2) panel or their power converter - LED driver.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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 EAX64317404 (1.0) motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: LGE2111A-T8, Nand: H27U1G8F2BTR, DDR: K4B1G1646G-BCK0, Spi: MX25L8006E. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the TDSN-G301D 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.
Remember! Attempts at self-repair by users of the LG 37LS560T TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
schematic diagram -------------> LG CHASSIS LD21B, MODEL 37LS5600, 37LS560S, 37LS560T, 37LS5610, 37LS5600/560S/560T-ZC 37LS5610-ZA
The appearance of the MainBoard EAX64317404 is shown in the figure below:EAX64317404
EAX64317404 can be used in TVs:
LG 32LS560T (Panel LC320EUN (SE)(M2)), LG 42LS5600 (Panel T420HVN01.1), LG 47LM580T (Panel LC470EUE (SE)(U1)), LG 42LM3400 (Panel LC420DUN (SE)(U2)), LG 37LS560T (Panel LC370EUN (SE)(M2)), LG 32LM340T (Panel LC320DXN (SE)(U3)), LG 47LM615S (Panel LC470EUE (SE)(U1)), LG 32LM3400 32LM3400-ZA (Panel LC320DXN (SE)(U2)).
The appearance of the power supply
Main features of the device LG 37LS560T:
Installed matrix (LED-panel) LC370EUN (SE) (M2).
The matrix control uses the Timing Controller (T-CON) 6870C-0401B.
The LED driver PPW-LE37SE-0 is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the LG 37LS560T TV is carried out by the EAX64405901 power supply module, or its analogs.
MainBoard - the main board (motherboard) is an EAX64317404 module using CPU chips: LGE2111A-T8, Nand: H27U1G8F2BTR, DDR: K4B1G1646G-BCK0, Spi: MX25L8006E and others.
The TDSN-G301D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC370EUN-SEM2
Type: a-Si TFT-LCD, Panel
Diagonal size: 36.5 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 808.128x454.572 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 330 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V