Technical description and composition of the LG 32LK451 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LK451 ZA
Chassis / Version: LD01U
Panel: T315HW04 V.9
T-CON: T370HW03 VB CTRL BD
Inverter (backlight): VIT71884.00 REV: 2 LOGAH
PWM Inverter: OZ9643N
Power Supply (PSU): EAX63985401 - LGP32-11P (PSLC-L008A)
PWM Power: L6599AD (PWM Resonant), 3BR4765JZ (Standby)
MOSFET Power: MDF6N60
MainBoard: EAX64290501
IC MainBoard: CPU: LGE107DC-RP, DDR: H5TQ1G63DFR-PBC, Nand: K9F1G08U0D, FLASH 25Q80, EEPROM 24C16
Tuner: TDTJ-S001D
Control: Remote: AKB72915244, IR: LW4500 LV2500
Specifications 32LK451
LG 32LK451
General recommendations for repairing TV LCD
Repair and diagnostics of any electronic device, in particular LG 32LK451 ZA, it is advisable to start with a careful external examination of internal and external elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If LG 32LK451 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the EAX63985401 power module - LGP32-11P (PSLC-L008A). In some cases, only the processor power regulator may be faulty. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip L6599AD, 3BR4765JZ may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
In cases where the LG 32LK451 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. It should be remembered that when protection is disabled in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: LGE107DC-RP, DDR: H5TQ1G63DFR-PBC, Nand: K9F1G08U0D, FLASH 25Q80, EEPROM 24C16 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the power supply of the TDTJ-S001D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
For owners of 32LK451 TVs, we recommend that you contact qualified professionals with experience to repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC MANUAL -------------------------> LG 32LK450 chassis LD01M; 32LK450A, 32LK450N, 32LK450U, 32LK451, 32LK450-ZH, 32LK450A-ZH, 32LK450N-ZH, 32LK450U-ZH, 32LK451-ZG
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 32LK451:
Installed matrix (LCD panel) T315HW04 V.9.
The matrix control uses the Timing Controller (T-CON) T370HW03.
To power the backlight, the inverter VIT71884.00 is used, it is controlled by the PWM controller OZ9643N.
The necessary supply voltages for all nodes of the LG 32LK451 TV are generated by the EAX63985401 power module or its analogs using L6599AD (PWM Resonant), 3BR4765JZ (Standby) microcircuits and MDF6N60 power switches.
MainBoard - the main board (motherboard) is an EAX64290501 module, using CPU chips: LGE107DC-RP, DDR: H5TQ1G63DFR-PBC, Nand: K9F1G08U0D, FLASH 25Q80, EEPROM 24C16 and others.
The TDTJ-S001D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW04 V9 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V