Technical description and composition of the LG 22LE3400 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 22LE3400
Chassis / Version: LD01A
Panel: LC216EXN (SC) (A1)
LED backlight: EDGE LED
T-CON: 6870S-0936A; SW0638
LED driver (backlight): integrated into T-CON
PWM LED driver: MAX16814
MOSFET LED driver: 10N20L
Power Supply (PSU): Adapter 19V
MainBoard: EAX61524502 (0)
IC MainBoard: CPU: LGE107D, DRAM: H5TQ1G63BFR, NAND Flash: HY27UF082G2B, SPI Flash: MX25L8005M2I, EEPROM: 24C16, Audio: NTP7100
Tuner: TDTJ-S001D EBL60721201
Specifications 22LE3400
LG 22LE3400
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 22LE3400 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the Adapter power module.
The TV is equipped with an external power adapter Type 19V. Owners of the TV can check them by replacement and purchase them in stores, but the ability to open and eliminate typical defects usually does not create difficulties for the master. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
As a rule, in this case, the LED backlight turns out to be faulty. More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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, the indicator indicates standby or operating mode, or blinks.
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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: LGE107D, DRAM: H5TQ1G63BFR, NAND Flash: HY27UF082G2B, SPI Flash: MX25L8005M2I, EEPROM: 24C16, Audio: NTP7100 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before changing the TDTJ-S001D EBL60721201 tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Once again, remind users! Attempts to self-repair the LG 22LE3400 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
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 22LE3400:
Installed matrix (LED-panel) LC216EXN (SC) (A1).
The matrix control uses the Timing Controller (T-CON) 6870S-0936A ;.
The LED driver integrated is used to power the backlight LEDs, it is controlled by the PWM controller MAX16814. As power elements of the LED driver, keys of the 10N20L type are used.
To power all the internal components of the LG 22LE3400 TV, an external adapter 19V type source 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, Audio: NTP7100 and others.
The TDTJ-S001D EBL60721201 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC216EXN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V