Technical description and composition of the LG 32LD320 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LD320
Chassis / Version: LD91A
Panel: T315XW03 V1
Inverter (backlight): VIT71884.00 Rev-2.LOGAN VIT71884.10
PWM Inverter: OZ964SN
Power Supply (PSU): EAX62106801 LGP32-10P1
PWM Power: ICE3BR1765 (Standby), HS01G (PFC), L6599D (PWM Resonant)
MainBoard: EAX60686904 (2)
IC MainBoard: CPU: LGE3368A (Saturn-6); NAND Flash: HY27US08121B-TPCB; SPI Flash: W25X32VSSIG; SOUND: NTP3100
Tuner: TDFW-G235D
Control: Remote: BN59-00685A, IR: LH20 Ver2.1
Specifications 32LD320
LG 32LD320
General recommendations for repairing TV LCD
LG TV, made on the basis of the LD91A / G chassis, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
In the case when the 32LD320-ZA does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the EAX62106801 / 1 power supply module is probably faulty in this case. If it is serviceable with such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard. 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 K5A60D, K13A60D converter.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip L6599D, HS01G, ICE3B0365J or breakage of resistors in its bundle .
If the LG 32LD320-ZA does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Diagnosis and repair of the motherboard LD91A / G EAX60686904 (2) is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required. If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - HY27US08121B, HY5PS161631C, K4T511630G-HCF7, 25X32VS1G, MAX3232C, NTP-3TH 100L, MP2212DN, tuner TDFW-G235D. Defective components should be replaced.
Attention to users! Independent repair of the TV LG 32LD320-ZA without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC MANUAL --> LG 32LD320, 32LD320-ZA, 32LD320N, 32LD320N-ZA, 32LD321, 32LD321-ZB Chassis LD91A
The appearance of the MainBoard EAX60686904 is shown in the figure below:EAX60686904
EAX60686904 can be used in TVs:
LG 32LD320 (Panel T315XW03 V1), LG 32LD320-ZA (Panel T315XW03), LG 32LH4000-ZA (Panel LC320WUN), LG 32LH2000 (Panel LK315T3LA57), LG 32LH2010 (Panel LK315T3LA57), LG 32LF2510 ZB (Panel LC320WUN (SA)(B3)), LG 37LH2000 (Panel LC370WXE (SB)(A1)), LG 19LD320 ZA (Panel M185B1-L02 Rev.C3), LG 26LH2000 (Panel T260XW02 V.R), LG 32LG2100 (Panel LC320WXN), LG 22LH2000 ZA (Panel V216B1-L02), LG 42LH2000 ZA.ARUVLH (Panel LC420WXE (SB)(A1)), LG 32LD321 32LD321-ZB (Panel T315XW03 V1), LG 26LD320 (Panel T260XW04 V.3), LG 19LH2000 19LH2000-ZA (Panel M185B1-L03).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the LGP32-10P1 module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the HS01G PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device LG 32LD320:
Installed matrix (LCD panel) T315XW03 V1.
The VIT71884.00 inverter is used to power the backlight, controlled by the OZ964SN PWM controller.
The necessary supply voltages for all nodes of the LG 32LD320 TV are generated by the EAX62106801 power module or its analogs using ICE3BR1765 (Standby), HS01G (PFC), L6599D (PWM Resonant) microcircuits.
MainBoard - the main board (motherboard) is an EAX60686904 module, using CPU chips: LGE3368A (Saturn-6); NAND Flash: HY27US08121B-TPCB; SPI Flash: W25X32VSSIG; SOUND: NTP3100 and others.
The TDFW-G235D tuner provides TV reception and channel tuning.
Information from an alternative source:
LG 32LD320-ZA
Panel Type (Matrix): T315XW03
Motherboard: LD91A / G EAX60686904 (2), TDFW-G235D tuner, HY27US08121B, HY5PS161631C, K4T511630G-HCF7, 25X32VSIG, LCX244, MAX3232C, 24C02WI, 24C08WI, NTPD5305, MPL2504, LDL2502, 5205, 5205, 5205, 5205, 511 ,
Invertor: VIT1884.00 / VIT1884.10, T51.8223.210, T51.8224.210, L51.8028.210, OZ964SN, AS324M-G1, AS339M-G1
PSU: EAX62106801 / 1, SMPS - L6599D & K5A60D, TR Chopper - LPM-101, SMPS - HS01G & K13A60D, TR Chopper - LP-002, SMPS - ICE3B0365J, TR Chopper - LS-002
Remote control: AKB69680403
Additional technical information about the panel:
Brand: AUO
Model: T315XW03 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: VA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V