Technical description and composition of the LG 26LE5500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 26LE5500 ZA
Chassis / Version: LD03D
Panel: LC260EUN (SC) (A1)
T-CON: 6870NS-1035B
LED driver (backlight): integrated into T-CON
Power Supply (PSU): Adapter 24V
MainBoard: EAX61524502 (0)
IC MainBoard: CPU: LGE107D; DRAM: H5TQ1G63BFR; NAND Flash: HY27UF082G2B; SPI Flash: MX25L8005M2I; EEPROM: 24C16, CAT24WC08W; SOUND: NTP7100
Tuner: TDTJ-S001D
Specifications 26LE5500
LG 26LE5500
General repair guidelines for TV LCD LED
If the LG 26LE5500 does not turn on, no control lights on the front panel light up or blink; therefore, there is a very high probability of a malfunction of the Adapter 24V power supply module. In some cases, only the processor power regulator may be faulty. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that you should look for by checking other elements of the primary circuit - electrolytic capacitors, PWM controller IC_Power, which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the LG 26LE5500 does not have an image, there is sound and the channels switch, there is a possibility of a malfunction in the backlight LED circuit of the LC260EUN (SC) (A1) panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the backlight unit.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
Repair of the EAX61524502 (0) motherboard should begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: LGE107D; DRAM: H5TQ1G63BFR; NAND Flash: HY27UF082G2B; SPI Flash: MX25L8005M2I; EEPROM: 24C16, CAT24WC08W; SOUND: NTP7100 for new or obviously working. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDTJ-S001D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners of the 26LE5500 TV are recommended to contact qualified specialists with experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram ------------------> LG 26LE5500 Chassis LD03D.
CHASSIS : LD03D; MODEL: 26LE5500, 26LE550N, 26LE5500, 26LE50N-ZA, 26LE5510, 26LE5510-ZB
The appearance of the MainBoard EAX61524502 is shown in the figure below:EAX61524502
EAX61524502 can be used in TVs:
LG 26LE3300 (Panel LC260EXN (SC)(A1)), LG 26LE5500 ZA (Panel LC260EUN (SC)(A1)), LG 19LD350 (Panel M185B1-L02), LG 22LE5500 (Panel LC215EUN).
Main features of the device LG 26LE5500:
Installed matrix (LED-panel) LC260EUN (SC) (A1).
The matrix control uses the Timing Controller (T-CON) 6870NS-1035B.
An integrated LED driver is used to power the backlight LEDs.
To power all the internal components of the LG 26LE5500 TV, an external adapter type 24V is used.
MainBoard - the main board (motherboard) is an EAX61524502 module using CPU chips: LGE107D; DRAM: H5TQ1G63BFR; NAND Flash: HY27UF082G2B; SPI Flash: MX25L8005M2I; EEPROM: 24C16, CAT24WC08W; SOUND: NTP7100 and others.
The TDTJ-S001D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC260EUN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V