Technical description and composition of the LG 32LS3500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LS3500
Chassis / Version: LD21C / LC21B
Panel: LC320EXN (SE) (A2)
LED backlight: 6922L-0010A, 6920L-0148A
T-CON: LC320EXN-SEA1-k31 6870C-0414A
LED driver (backlight): PPW-LE32GX-O (A) REV0.4 6917L-0097A
PWM LED driver: BD9395EFV
Power Supply (PSU): EAX64324701 (1.5) EAY62512301
PWM Power: FSL106HR (Standby DIP-8)
MainBoard: EAX64664903 (1.0) EBR75097913
IC MainBoard: LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173
Tuner: TDSS-G101C EBL61060001
Specifications 32LS3500
LG 32LS3500
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The LG 32LS3500 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
With such manifestations, the EAX64324701 power supply module usually fails. Then we recommend that you measure first the output voltage of the converter on the FSL106HR PWM controller (Standby DIP-8).
It should be remembered that during the breakdown of semiconductors in secondary circuits, any converter can operate normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM).
- 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.
In most cases, the malfunction is caused by the lack of a backlight display. 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 LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDSS-G101C EBL61060001 tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It should be remembered! Attempts to self-repair the LG 32LS3500 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC ----------------------> LG 32LS359T Chassis LD21C.
LG 32LS3500/350S/350T/3510, 32LS3590/359S/359T, 32LS3500/350S/350T-ZA
32LS3510-ZB, 32LS3590/359S/359T-ZC.
PSU SCHEMATIC ---------------> LGP32L-12P EAY62512301 EAX64324701 Power supply
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 32LS3500:
Installed matrix (LED-panel) LC320EXN (SE) (A2).
The matrix control uses the Timing Controller (T-CON) LC320EXN-SEA1-k31.
The LED driver PPW-LE32GX-O is used to power the backlight LEDs, it is controlled by the BD9395EFV PWM controller.
The necessary supply voltages for all nodes of the LG 32LS3500 TV are generated by the EAX64324701 power module or its analogs using FSL106HR (Standby DIP-8) microcircuits.
MainBoard - the main board (motherboard) is an EAX64664903 module using LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173 and other chips.
Tuner TDSS-G101C EBL61060001 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SEA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1200: 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 (1 ch, 8-bit), 30 pins
Voltage: 12.0V