Technical description and composition of the LG 32LM580T TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LM580T
Chassis / Version: LD21B / LC21B
Panel: LC320EUN (SE) (F3) // LC320EUN (SE) (F2)
LED backlight: 6922L-0011A, 6916L-0801C
T-CON: 6870C-0401B 32/37/42/47/55 FHD TM120 Ver 0.2
LED driver (backlight): PPW-LE32SE-0 (A) 6917L-0080A
PWM LED driver: SW5516
Power Supply (PSU): LGP32M-12P EAX64604501 (1.5) LGP32M-12P
PWM Power: L6599AD (PWM Resonant), FSL106HR (Standby DIP-8), HS01G (PFC)
MOSFET Power: MDF11N60, STD10NM60N
MainBoard: EAX64909901 (1.0)
IC MainBoard: LGE2111A-T8, NAND FLASH: H27U1G8F2BTR / BC - 1 Gbit (128M x 8 bit), SPI: W25Q80, EEPROM: 24C256, AUDIO: STA380BWE
Tuner: TDSN-G301D
Control: AKB73615307
Specifications 32LM580T
LG 32LM580T
General repair guidelines for TV LCD LED
TV LG 32LM580T, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the LGP32M-12P power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the main fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
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 LED driver (LC320EUN (SE) (F3) panel backlight LED power converter).
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.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
The motherboard EAX64909901 (1.0) 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.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - LGE2111A-T8, NAND FLASH: H27U1G8F2BTR / BC - 1 Gbit (128M x 8 bit), SPI: W25Q80, EEPROM: 24C256, AUDIO: STA380BWE with new or known serviceable. In cases where BGA technologies are used, defects are usually localized by the heating method.
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 terminals. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention! For users and owners of 32LM580T TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC MANUAL --------> LG_MODEL : 32LM580S/580T/585S, 32LM580S/580T-ZA, 32LM585S-ZD CHASSIS : LD21B
SCHEMATIC ----------------------> LG EAX64604501 (1.5) LGP32M-12P-3 Power supply
To reduce the backlight current in LED drivers with the SW5516 controller, it is necessary to proportionally increase the total resistance of the resistors connected between the 28 output of SW5516 and the housing, for example, by removing one of the resistors. You can calculate the resistance when connecting resistors in parallel
More details on this page
The appearance of the MainBoard EAX64909901 is shown in the figure below:EAX64909901
EAX64909901 can be used on TVs:
LG 42LM580T-ZA (Panel LC420EUE (SE)(F1)), LG 42LM340T (Panel LC420DUN (SE)(U3)), LG 32LM580T (Panel LC320EUN (SE)(F3)), LG 42LM585T ZD (Panel LC420EUE (SE)(F1)), LG 42LM615T (Panel LC420EUE (SE)(F1)), LG 42LS560T 42LS560T-ZC (Panel T420HVN01.1).
PSU Advanced
The LGP32M-12P 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 node is a Step-Up Converter based on the ICE1HS01G PWM controller, which evenly distributes high-frequency charge pulses of the electrolytic capacitor of the rectifier filter of the mains voltage 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 32LM580T:
Installed matrix (LED-panel) LC320EUN (SE) (F3) or LC320EUN (SE) (F2).
The matrix control uses the Timing Controller (T-CON) 6870C-0401B.
The LED driver PPW-LE32SE-0 (A) is used to power the backlight LEDs, it is controlled by the PWM controller SW5516.
The necessary supply voltages for all nodes of the LG 32LM580T TV are generated by the LGP32M-12P power supply module or its analogs using L6599AD (PWM Resonant), FSL106HR (Standby DIP-8), HS01G (PFC) microcircuits and MDF11N60, STD10NM60N type power switches.
MainBoard - the main board (motherboard) is an EAX64909901 module using LGE2111A-T8 chips, NAND FLASH: H27U1G8F2BTR / BC - 1 Gbit (128M x 8 bits), SPI: W25Q80, EEPROM: 24C256, AUDIO: STA380BWE and others.
The TDSN-G301D tuner provides television reception and channel tuning.