Technical description and composition of the LG 32LS560T TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LS560T
Chassis / Version: LC21B
Panel: LC320EUN (SE) (M2)
LED backlight: 6922L-0011A 6916L0801A 32 V12 Edge REV1.1 6920L-0001C
T-CON: 32/37/42/47/55 FHD TM120 Ver0.2 Composition: LG5830 (TL2350EP), TPS65178, TPS65198
LED driver (backlight): V341-001-005 / PPW-LE32SE-O (A) REV0.5
Power Supply (PSU): EAX64310001 (1.7) Rev1.0
PWM Power: FAN7930B (PFC), L6599AD (PWM Resonant), ICE3BR4765JZ (Standby)
MOSFET Power: TK6P60V
MainBoard: EAX64317404 (1.0) G4_L_TU123
IC MainBoard: CPU: LGE2111A-T8, Nand: H27U1G8F2BTR, DDR: K4B1G1646G-BCK0, Spi: MX25L8006E
Tuner: TDSN-G301D
Specifications 32LS560T
LG 32LS560T
General repair guidelines for TV LCD LED
LG 32LS560T, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. 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. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the absence of any signs of operability, when the LG 32LS560T does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV EAX64310001 (1.7) Rev1.0 power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If there is no image when you turn on the LG 32LS560T, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LC320EUN (SE) (M2) panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
If the motherboard LD21B / LC21B EAX64317404 (1.0) G4_L_TU123 is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Owners and users of the LG 32LS560T TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC-----------------------> LG 32LS5600/560S/560T/5620, 32LS5600/560S/560T-ZC, 32LS5620-ZD, 32LS5610/561T, 32LS5610/561T-ZA Chassis LD21B
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)).
PSU Advanced
On the 32LS560T, the EAX64310001 power module is installed using the PFC (Power Factor Correction) scheme, which acts as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN7930B PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the value of the charge current determines its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the device LG 32LS560T:
Installed matrix (LED-panel) LC320EUN (SE) (M2).
The matrix control uses the Timing Controller (T-CON) 32.
The LED driver V341-001-005 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the LG 32LS560T TV are generated by the EAX64310001 power module or its analogs using FAN7930B (PFC), L6599AD (PWM Resonant), ICE3BR4765JZ (Standby) microcircuits and power switches of the TK6P60V type.
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: LC320EUN-SEM2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (6-bit + Hi-FRC), 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