Technical description and composition of the LG 32LE5500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LE5500
Chassis / Version: LD03D
Panel: LC320EUH (SC) (A1)
LED backlight: 3660L-0346A: LG Innotek 32 "Rev 0.4 48EA
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAY60803001 LGP37-10SLPBLD
PWM Power: VIPER27L (Standby), L6599D (PWM Resonant), HS01G (PFC)
MainBoard: EAX61762608 (1) EBT60992601
IC MainBoard: LGE3556C, 04GW3B2DN6E, NT5TU128M8DE_BD, UPD78F0513AGA-GAM-AX
Tuner: TDTJ-S001D
Specifications 32LE5500
LG 32LE5500
General repair guidelines for TV LCD LED
Repair of the LG 32LE5500 TV should begin with a fault diagnosis, which involves a careful inspection of the external and internal elements of the device. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Malfunctions of the 3PAGC10017A power supply module can be expressed in different ways, for example, LG 32LE5500 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the LG 32LE5500 TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the LC320EUH (SC) panel (A1) 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.
Repair of the MB motherboard: EBT60992601 must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
If the tuner TDTJ-S001D is malfunctioning, dismantle it and solder it from the side of the planar elements. It is necessary to pay attention to the joints (soldering) with the body and the conclusions of the metal partitions. In most of these cases, the tuner is restored to normal operation. More details can be found on the page Tuner Repair TDTJ-S001D.
Owners and users of the LG 32LE5500 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!Typical defects of LG TVs with LGE3556C processors are provoked by its severe temperature conditions and the quality of the LGE3556C processor itself.
External manifestations may be different - the tuner or external inputs do not work, or the TV does not turn on, for example, the control lamp blinks or hangs on the screen saver.
If, when the processor warms up, performance is restored, in such cases a reball can sometimes help. Then there is the opportunity to extend the life of the TV with the help of an additional heat sink or cooler.
When replacing the processor, it should be borne in mind that they are discontinued and all LGE3556C, which sellers ALIexpress send, in most cases control units, are often already faulty.
SCHEMATIC MANUAL -------------> LG 32LE5500, 32LE5500-TA, 32LE5510, 32LE5510-TB Chassis LB03D.
The appearance of the MainBoard EAX61762608 is shown in the figure below:EAX61762608
EAX61762608 can be used in TVs:
LG 32LE5500 (Panel LC320EUH (SC)(A1)), LG 37LE5500 (Panel LC370EUH), LG 32LE7500 (Panel LC320EUH (SC)(A4)).
The appearance of the power supply
Main features of the device LG 32LE5500:
Installed matrix (LED-panel) LC320EUH (SC) (A1).
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the LG 32LE5500 TV are generated by the EAY60803001 power module or its analogs using VIPER27L (Standby), L6599D (PWM Resonant), HS01G (PFC) microcircuits.
MainBoard - the main board (motherboard) is an EAX61762608 module, using chips LGE3556C, 04GW3B2DN6E, NT5TU128M8DE_BD, UPD78F0513AGA-GAM-AX and others.
The TDTJ-S001D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EUH-SCA1
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: 450 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 1.06B (8-bit + Dithering), CIE1931 72%
Response Time: 8/10 (Tr / Td)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: Mini LVDS, 120 pins
Voltage: 3.3 / 16.0V (VCC / VDD)