Technical description and composition of the LG 22LE5500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 22LE5500
Chassis / Version: LD01A
Panel: LC215EUN
LED backlight: EDGE LED
LED driver (backlight): integrated into T-CON / Main
Power Supply (PSU): Adapter
MainBoard: EAX61524502
IC MainBoard: CPU: UPD78F0513A; Sound: NTP7000; DRAM: K4B1G1646E-HCH9; NAND Flash: H27U1G8F2BTR-BC; SPI Flash: 25Q80; EEPROM: CAT24WC08W
Tuner: TDTJ-S001D
Specifications 22LE5500
LG 22LE5500
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 22LE5500 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Most often, with such manifestations, the main adapter power module is found to be faulty.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure its output voltages and, if they are absent, to check for short-circuit probabilities in the converters, power switches and rectifier diodes.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more 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), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the EAX61524502 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: UPD78F0513A; Sound: NTP7000; DRAM: K4B1G1646E-HCH9; NAND Flash: H27U1G8F2BTR-BC; SPI Flash: 25Q80; EEPROM: CAT24WC08W and other possible defective 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 works 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 and users of the LG 22LE5500 TV should 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!
FIRMWARE FOR SPI FLASH, EEPROM ----> LG 22LE5500 LD01A, Main: EAX61524502, Panel: LC215EUN
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 22LE5500:
Installed matrix (LED-panel) LC215EUN.
An integrated LED driver is used to power the backlight LEDs.
To power all the internal components of the LG 22LE5500 TV, an external adapter type source is used.
MainBoard - the main board (motherboard) is an EAX61524502 module using CPU chips: UPD78F0513A; Sound: NTP7000; DRAM: K4B1G1646E-HCH9; NAND Flash: H27U1G8F2BTR-BC; SPI Flash: 25Q80; EEPROM: CAT24WC08W and others.
The TDTJ-S001D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC215EUN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Display Colors: 16.7M (8-bit)
Frequency: 60Hz
Lamp Type: WLED