Technical description and composition of the LG 32LD320-ZA TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LD320-ZA
Chassis / Version: LD91A / G
Panel: T315XW03
T-CON: T315XW04 V1 TEST BD
Inverter (backlight): VIT1884.00 / VIT1884.10 T51.8223.210
PWM Inverter: OZ964SN, AS339M-G1, AS324M-G1
MOSFET Inverter: P4004ED, P2904BD
Trans Inverter: T51.8223.210, T51.8224.210
Power Supply (PSU): EAX62106801 / 1
PWM Power: L6599D (PWM Resonant), HS01G (PFC), ICE3B0365J (Standby)
MOSFET Power: K5A60D, K13A60D
MainBoard: EAX60686904 (2)
IC MainBoard: HY27US08121B, HY5PS161631C, K4T511630G-HCF7, 25X32VS1G, MAX3232C, NTP-3TH 100L, MP2212DN
Tuner: TDFW-G235D
Control: AKB69680403
Specifications 32LD320
LG 32LD320-ZA
General recommendations for repairing TV LCD
LG TV, made on 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 lights 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.
Diagnostics 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 there is no way to replace the MB (SSB) board, 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
The EAX62106801 / 1 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 is a Step-Up Converter based on the HS01G PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly 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 32LD320-ZA:
Installed matrix (LCD panel) T315XW03.
The matrix control uses the Timing Controller (T-CON) T315XW04.
To power the backlight, an inverter VIT1884.00 is used, it is controlled by the PWM controller OZ964SN, AS339M-G1, AS324M-G1. The transformer T51.8223.210, T51.8224.210 is installed in the inverter converter. As power elements of the inverter, keys of the type P4004ED, P2904BD are used.
The necessary supply voltages for all nodes of the LG 32LD320-ZA TV are generated by the EAX62106801 power module or its analogs using L6599D (PWM Resonant), HS01G (PFC), ICE3B0365J (Standby) microcircuits and power switches of the K5A60D, K13A60D type.
MainBoard - the main board (motherboard) is an EAX60686904 module, using HY27US08121B, HY5PS161631C, K4T511630G-HCF7, 25X32VS1G, MAX3232C, NTP-3TH 100L, MP2212DN, and others microcircuits.
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 VF CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
