LG LED
Model: 37LV3500-ZA
Chassis / Version: LD01U
Panel: T370HW05 V.1 // LC370EUN (SD) (V2)
LED backlight: 73.37T07.001-0-CS1
T-CON: T315HW07 V8 MAX16814, G1564 // 6870C-0374A LC370EUN-SDV1
LED driver (backlight): PPW-LE37GD-O (D) Rev1.0 - 6917L-0056D
Power Supply (PSU): EAX62865601 / 8 LGP3237-11SP
PWM Power: FAN7930B (PFC), L6599AD (PWM Resonant L6599AI), ICE3BR4765JZ (Standby)
MOSFET Power: K10A60D
MainBoard: EAX64290501 (0), T460HV03VF, AUO-12306, BD8160EFV, G582N, AUO-G1422
IC MainBoard: SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, 2401RP, AP2191D, H5TQ1G63DFR, NTP-7100
Tuner: TDTJ-S001D * EBL60721201
Specifications 37LV3500
LG 37LV3500-ZA
General repair guidelines for TV LCD LED
TV LG 37LV3500-ZA, 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. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and the buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the EAX62865601 / 8 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain LG models. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the LG 37LV3500-ZA TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the T370HW05 V.1 panel is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
The motherboard should be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Board repair and chip replacement SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, 2401RP, AP2191D, H5TQ1G63DFR, NTP-7100 are carried out with the necessary equipment and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before replacing the TDTJ-S001D * EBL60721201 tuner, if there is no tuning to the channels, you must first dismantle it and carefully solder it. In most cases, the malfunctions of this tuner are eliminated by the method of total soldering it from the side of planar elements. Details on the page Tuner Repair TDTJ-S001D.
Owners and users of the LG 37LV3500-ZA TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
schematic diagram -------------> LG 37LV3500, 37LV3500-ZA, 37LV3550, 37LV355A, 37LV355C, 37LV355N, 37LV355U, 37LV3550, 37LV355A, 37LV355C, 37LV355N, 37LV355U-ZB Chassis LD01U.
schematic diagram -------------> EAX62865601 rev1 LGP3237-11SPC1 Power Supply schematic diagram
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).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the EAX62865601 / 8 LGP3237-11SP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7930B 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 37LV3500-ZA:
Installed matrix (LED-panel) T370HW05 V.1 or LC370EUN (SD) (V2).
The matrix control uses the Timing Controller (T-CON) T315HW07.
The LED driver PPW-LE37GD-O is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the LG 37LV3500-ZA TV are generated by the EAX62865601 power supply module or its analogs using FAN7930B (PFC), L6599AD (PWM Resonant L6599AI), ICE3BR4765JZ (Standby) microcircuits and power switches of the K10A60D type.
MainBoard - the main board (motherboard) is an EAX64290501 module, using SAA35408711, MAX3232C, S324M-E1, 25L8006E, LCX244, 2401RP, AP2191D, H5TQ1G63DFR, NTP-7100, and others microcircuits.
Tuner TDTJ-S001D * EBL60721201 provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG 37LV3500-ZA.BRUYLJU Chassis LD01U
Panel Type (Matrix): LC370EUN (SD) (V2),
Motherboard: EAX64290501 (0), Tuner: TDTJ-S001D * EBL60721201
T-con: 6870C-0374A LC370EUN-SDV1
LED Driver: PPW-LE37GD-O (D) Rev1.0 6917L-0056D, IR: RSA6591401A
PSU: EAX62865601 / 8
Remote control: AKB72915244
Additional technical information about the panel:
Brand: AUO
Model: T370HW05 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 3600: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
