Technical description and composition of the LG 32LV370S TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LV370S
Chassis / Version: LD12B
Panel: T315HW07 V.8
LED backlight: 73.31T14.004-5-SK1 LG INN0TEK 32INCH 5630PKG 40EA Rev0.0 110104
T-CON: 46T03-C0K T460HW03 VF CTRL BD
LED driver (backlight): T315HW07.V8 led 31T14-D04
Power Supply (PSU): EAX62865601 / 8 LGP3237-11SPC1
PWM Power: FAN7930B (PFC), L6599AI, ICE3BR4765JZ
MOSFET Power: K10A60D
MainBoard: EAX63557704 (0)
IC MainBoard: pu: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, Eeprom: 24C1024
Tuner: TDFQ-G001D
Control: IR: 1BF-3001A
Specifications 32LV370S
LG 32LV370S
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 32LV370S does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Often in such cases, the EAX62865601 power module is faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches (K10A60D) of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers FAN7930B (PFC), L6599AI, ICE3BR4765JZ, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the EAX63557704 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 pu chips: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, Eeprom: 24C1024 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the TDFQ-G001D tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the LG 32LV370S TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC MANUAL -----------------------> LG CHASSIS LD12B; MODEL 42LV3700, 42LV370S, 42LV3700/370S-ZC, 42LV375G/S/W 42LV375G/S/W-ZC
The appearance of the MainBoard EAX63557704 is shown in the figure below:EAX63557704
EAX63557704 can be used in TVs:
LG 37LV370S (Panel T370HW05 V.1), LG 42LV370S (Panel LC420EUN (SD) (V5)), LG 32LV3700 (Panel T315HW07 V.8), LG 42LV3700 (Panel LC420EUN (SD)(V3)), LG 47LV370S ZB (Panel LC470EUE (SD)(V1)), LG 32LV370S (Panel T315HW07 V.8).
The appearance of the power supply
Main features of the device LG 32LV370S:
Installed matrix (LED-panel) T315HW07 V.8.
The matrix control uses the Timing Controller (T-CON) 46T03-C0K.
The LED driver T315HW07.V8 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the LG 32LV370S TV are generated by the EAX62865601 power module or its analogs using FAN7930B (PFC), L6599AI, ICE3BR4765JZ microcircuits and K10A60D type power switches.
MainBoard - the main board (motherboard) is an EAX63557704 module, using pu chips: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, Eeprom: 24C1024 and others.
The TDFQ-G001D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW07 V8 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)
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V