Technical description and composition of the LG 32LH3000 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LH3000 ZA
Chassis / Version: LD91A
Panel: LC320WUN (SA) (B2) // LC320WXN (SB) (A3)
Lamp backlight: EEFL
T-CON: 6870C-0238B
Inverter (backlight): 6632L-0518B
PWM Inverter: BD9897FS
Power Supply (PSU): LGP32-09P EAX55176301
PWM Power: ICE3B0365J (Stb), L6599D (PWM), L6562A (PFC)
MOSFET Power: TK6A60D, TK13A60D (PFC)
MainBoard: EAX60686902 (0) EBR61248505 // EAX60686904 (2)
IC MainBoard: CPU: LGE3368A-LF-SF, RAM: HY5PS1G1631C, SPI FLASH: Winb25X32VSIG, AUDIO: NTP-3100L
Tuner: TDFW-G235D
Specifications 32LH3000
LG 32LH3000
General recommendations for repairing TV LCD
Possible manifestations of defects
- The LG 32LH3000 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the LGP32-09P power supply is usually faulty. It is necessary to measure its output voltages, and if they are absent (full or partial), the power switches (TK6A60D, TK13A60D (PFC)) of the converters and rectifier diodes should be checked for possible short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most 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) ICE3B0365J (Stb), L6599D (PWM), L6562A (PFC), if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX60686902 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: LGE3368A-LF-SF, RAM: HY5PS1G1631C, SPI FLASH: Winb25X32VSIG, AUDIO: NTP-3100L and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the supply voltage of the TDFW-G235D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! For users and owners of 32LH3000 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual and schematic diagram -------------> LG 32LH3000 Chassis LD91A.
FIRMWARE SPI FLASH -------> LG 32LH3000 ZA LD91A, Main: EAX60686904(2), Panel: LC320WXN (SB)(A3)
The appearance of the MainBoard EAX60686902 is shown in the figure below:EAX60686902
EAX60686902 can be used in TVs:
LG 37LH3000 (Panel T370HW02 V.G), LG 32LH2000 (Panel LK315T3LA57), LG 32LF2510 ZB (Panel LC320WUN (SA)(B3)), LG 42LF2510 (Panel LC420WUE (SB)(C1)), LG 47LH3000 (Panel LC470WUE), LG 32LH3010 (Panel LC320WUN (SA)(B2)), LG 37LH2010 37LH2010-ZB.BRUVLJU (Panel LC370WXE (SB)(A1)).
The appearance of the power supply
Main features of the device LG 32LH3000:
The matrix (LCD panel) LC320WUN (SA) (B2) or LC320WXN (SB) (A3) is installed.
The matrix control uses the Timing Controller (T-CON) 6870C-0238B.
To power the backlight, an inverter 6632L-0518B is used, it is controlled by the BD9897FS PWM controller.
The necessary supply voltages for all nodes of the LG 32LH3000 TV are generated by the LGP32-09P power module, or its analogs using ICE3B0365J (Stb), L6599D (PWM), L6562A (PFC) microcircuits and power switches of the TK6A60D, TK13A60D (PFC) type.
MainBoard - the main board (motherboard) is an EAX60686902 module using CPU chips: LGE3368A-LF-SF, RAM: HY5PS1G1631C, SPI FLASH: Winb25X32VSIG, AUDIO: NTP-3100L and others.
The TDFW-G235D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WUN-SAB2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 6.0 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V
