Technical description and composition of the LG 32LV4500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LV4500
Chassis / Version: LT01U
Panel: LC320EUD (SD) (A4)
LED backlight: 3660L-0373A = 32 V6 Edge EHD Rev1.0 1 R-Type, L-Type
T-CON: 6870C-0358A
LED driver (backlight): 6917L-0045A, (PCLC-D002a), 3PDGC20001A-R
PWM LED driver: SW5508, SM1202
Power Supply (PSU): EAX62865601 -8
PWM Power: FAN7930B, L6599AI, ICE3BR4765JZ
MOSFET Power: K10A60D
MainBoard: EAX64290501 (0) SAA35408720 SAA35419933 EBR73156237
IC MainBoard: LGE107DC-RP, SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, AP2191D, H5TQ1G63DFR, NTP-7100
Tuner: TDTJ-S001D
Control: IR: LW4500 LV2500 LK550_V1.7
Specifications 32LV4500
LG 32LV4500
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 32LV4500 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, a malfunction is most likely to be detected in the EAX62865601 power module. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (K10A60D) and rectifier diodes for a probable short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) FAN7930B, L6599AI, ICE3BR4765JZ, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX64290501 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - LGE107DC-RP, SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, AP2191D, H5TQ1G63DFR, NTP-7100. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If a TDTJ-S001D tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
It should be remembered! Attempts to self-repair the LG 32LV4500 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 MANUAL -----------------------> LG 32LV4500, 32LV450A, 32LV450N, 32LV450U, 32LV4500-ZC, 32LV450A-ZC, 32LV450N-ZC, 32LV450U-ZC Chassis LT01U
The appearance of the MainBoard EAX64290501 is shown in the figure below:EAX64290501
EAX64290501 can be used in TVs:
LG 32LV2500-ZA (Panel T315XW06 V.3), LG 37LV3500-ZA (Panel T370HW05 V.1), LG 42LV3400-ZA (Panel T420HW08 V.1), LG 32LK530 (Panel LC320WUD (SC)(A3)), LG 37LK430 (Panel LC370WUE), LG 32LK451 ZA (Panel T315HW04 V.9), LG 42LV3551 (Panel LC420EUN (SD) (V3)), LG 47LW4500 (Panel LC470EUF (SD)(F2)), LG 32LK551 ZB (Panel LC320WUD (SC)(A2)), LG 42LV3500 (Panel LC420EUN (SD)(V3)), LG 42LK551 ZB (Panel V420H2-LH5), LG 42LK451 42LK451-ZG.BRUYLJU (Panel T420HW09 V0), LG 42LK530 (Panel LC420WUF (SC)(A2)), LG 47LK950 ZA (Panel LC470WUF (SD)(P1)), LG 32LW4500 ZB (Panel LC320EUD (SD)(P1)), LG 42LW4500 ZB (Panel LC420EUF (SD)(PX)), LG 42LV4500 DA (Panel LC420EUF (SD)(A1)), LG 32LV4500 (Panel LC320EUD (SD)(A4)), LG 42LV369C (Panel T420HW08 V.9).
The appearance of the power supply
Main features of the device LG 32LV4500:
Installed matrix (LED-panel) LC320EUD (SD) (A4).
The matrix control uses the Timing Controller (T-CON) 6870C-0358A.
The LED driver 6917L-0045A is used to power the backlight LEDs, it is controlled by the PWM controller SW5508, SM1202.
The necessary supply voltages for all nodes of the LG 32LV4500 TV are generated by the EAX62865601 power supply module or its analogs using FAN7930B, L6599AI, ICE3BR4765JZ microchips and K10A60D type power switches.
MainBoard - the main board (motherboard) is an EAX64290501 module, using chips LGE107DC-RP, SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, AP2191D, H5TQ1G63DFR, NTP-7100 and others.
The TDTJ-S001D tuner provides TV reception and channel tuning.
