Technical description and composition of the LG 42LV3400-ZA TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 42LV3400-ZA
Chassis / Version: LD01U
Panel: T420HW08 V.1 // T420HW08 V.9
LED backlight: 5630 Edge
T-CON: T460HW03 VF CTRL BD; TPS65161, AU0-12306, AUO-G1422
LED driver (backlight): T315HW07 V8 LED DRIVER BD (UH = 98v, UL = 22v8)
PWM LED driver: MAX16814, RM5103
MOSFET LED driver: G1564, P3506DD, P1825AS
Power Supply (PSU): EAX64127301 / 6 // EAX64127301 / 9
PWM Power: ICE3BR4765JZ (Standby), FAN7930B (PFC), L6599AD (PWM Resonant)
MOSFET Power: 10NM60N (PFC), 7NM60N
MainBoard: EAX64290501 (0)
IC MainBoard: SAA35408711, 25L8006E, 24C16WP, MAX3232C, AS324M-E1, NTP-7100, AP2191D, H5TQ1G63DFR
Tuner: TDTJ-S001D EBL60721201
Control: AKB72915207
Specifications 42LV3400
LG 42LV3400-ZA
General repair guidelines for TV LCD LED
TV LG 42LV3400-ZA, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the 42LV3400-ZA TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink, there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be malfunctioning, which is typical for some LG models. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller ICE3BR4765JZ, FAN7930B, L6599AD, which it is desirable to check by replacement, are subject to verification.
If the LG 42LV3400-ZA does not have an image, there is sound and the channels switch, there is a possibility of a malfunction in the T420HW08 V.1 panel backlight LED circuit, or their power converter — LED drivers. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
In cases of attempts to repair the motherboard AEX 64290501 (0), it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - SAA35408711, 25L8006E, 24C16WP, MAX3232C, AS324M-E1, NTP-7100, AP2191D, H5TQ1G63DFR. Defective components should be replaced.
The TDTJ-S001D EBL60721201 tuner malfunction is established after checking the software and all supply voltages at its terminals. In most cases, the performance of this tuner is restored after carefully soldering it from the planar elements. Be sure to solder the joints with the body and the conclusions of the metal partitions. Details can be found on the page Tuner Repair TDTJ-S001D.
It should be remembered! Attempts to repair the LG 42LV3400-ZA 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!
Led Edge 74.42T13.004-0-CS1; LG INNOTEK 42NCH 5630PKG 2CUP 60EA Rev0.1 110603.
SCHEMATIC DIAGRAM ----------> LG 42LV3400, 42LV340A, 42LV340N, 42LV304U, 42LV3400-ZA, 42LV340A-ZA, 42LV340N-ZA, 42LV340U-ZA Chassis LD01U.
FIRMWARE SPI FLASH, EEPROM LG 42LV3400-ZA LD01U, Main: EAX64290501 (0), Panel: T420HW08 V.9
To reduce the backlight current in LED drivers with a PWM controller MAX16814 (TSSOP20 MAX16814B), it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (SETI) to the housing. The maximum current in each of the four channels (in milliamps) for the resistance Rseti (in kilo-ohms) is determined from the ratio 1500 / Rseti.
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).
PSU Advanced
The EAX64127301 / 6 power module is designed using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the FAN7930B PWM controller, which evenly distributes high-frequency impulses of the charging current 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 42LV3400-ZA:
Installed matrix (LED-panel) T420HW08 V.1 or T420HW08 V.9.
The matrix control uses the Timing Controller (T-CON) T460HW03.
The LED driver T315HW07 is used to power the backlight LEDs, it is controlled by the PWM controller MAX16814, RM5103. As the power elements of the LED driver, keys of the type G1564, P3506DD, P1825AS are used.
The necessary supply voltages for all nodes of the LG 42LV3400-ZA TV are generated by the EAX64127301 power supply module or its analogs using ICE3BR4765JZ (Standby), FAN7930B (PFC), L6599AD (PWM Resonant) microcircuits and 10NM60N (PFC), 7NM60N power switches.
MainBoard - the main board (motherboard) is an EAX64290501 module, using microchips SAA35408711, 25L8006E, 24C16WP, MAX3232C, AS324M-E1, NTP-7100, AP2191D, H5TQ1G63DFR and others.
Tuner TDTJ-S001D EBL60721201 provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG 42LV3400-ZA Chassis LD01U
Panel Type (Matrix): T420HW08 V.1
Motherboard: EAX 64290501 (0), Flash IC102: (sticker: SAA35408711 Ver4.01.20 4279), 25L8006E, 24C08W1, 24C16WP, 2401RP, MAX3232C, AS324M-E1, H5TQ1G63DFR x2, LCX24405, 721, TUN, AP21, TX2100, AP21 : TDTJ-S001D EBL60721201,
T-con: T460HW03 VF CTRL BD, TPS65161, AU0-12306, AUO-G1422
Invertor: T315HW07 V8, MAX16814, G1564
PSU: PSLF-L016A, ICE3BR4765JZ, FAN7930B, L6599A
Remote control: AKB72915207
Additional technical information about the panel:
Brand: AUO
Model: T420HW08 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 3500: 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 (2 ch, 10-bit), 51 pins
Voltage: 12.0V