Technical description and composition of the LG 32LS3590 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LS3590 32LS3590-ZC.BRUDLJU
Chassis / Version: LD21C
Panel: T320XVN01.1
LED backlight: 73.32T21.002-2-JS1
T-CON: 32T21-C04
LED driver (backlight): 32T21-D01
PWM LED driver: L302-1F
Power Supply (PSU): EAX64324701 EAY62512301
PWM Power: L6599AD, FSL106HR
MainBoard: EAX64664903 (1.0) EBR75097905
IC MainBoard: LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, 25080 BVSIG, AP7173
Tuner: TDSN-G301D
Control: IR: EBR74561003
Specifications 32LS3590
LG 32LS3590
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 32LS3590 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, in some cases, the EAX64324701 power module is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers L6599AD, FSL106HR, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 for them. 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 an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the EAX64664903 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). If it is not possible to replace the MB (SSB) board, you need to check the health of its elements - LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, 25080 BVSIG, AP7173. Defective components should be replaced.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TDSN-G301D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention TV owners! Self-repair attempts by LG 32LS3590 are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC ----------------> LG 32LS3500/350S/350T/3510, 32LS3590/359S/359T, 32LS3500/350S/350T-ZA 32LS3510-ZB, 32LS3590/359S/359T-ZC Chassis LD21C
The appearance of the MainBoard EAX64664903 is shown in the figure below:EAX64664903
EAX64664903 can be used in TVs:
LG 32CS460T (Panel LC320WXN (SC)(A4)), LG 42LS3400 (Panel LC420DUN (SE)(R2)), LG 32LS3400 ZC (Panel LC320DXN (SE)(R2)), LG 32LS3500 (Panel LC320EXN (SE)(A2)), LG 32CS466 (Panel LC320WXN (SC)(A4)), LG 32LS3590 32LS3590-ZC.BRUDLJU (Panel T320XVN01.1), LG 32LS359T (Panel LC320EXN (SE)(A2)), LG 42CS460T 42CS460T-ZA (Panel LC420WUE (SC)(A3)).
The appearance of the power supply
Main features of the device LG 32LS3590:
Installed matrix (LED panel) T320XVN01.1.
The matrix control uses the Timing Controller (T-CON) 32T21-C04.
The LED driver 32T21-D01 is used to power the backlight LEDs, it is controlled by the L302-1F PWM controller.
The necessary supply voltages for all nodes of the LG 32LS3590 TV are generated by the EAX64324701 power module, or its analogs using L6599AD, FSL106HR microcircuits.
MainBoard - the main board (motherboard) is an EAX64664903 module, using LGE2111A-T8, K4B1G1646G-BCKO microcircuits, STA3808 WE, 25080 BVSIG, AP7173 and others.
The TDSN-G301D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T320XVN01.1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V