Technical description and composition of the LG 22LV2500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 22LV2500 ZG
Chassis / Version: LD01R
Panel: M215HGE-L10 Rev. C1
LED backlight: 4 strings
T-CON: M215HGE-L10-X + C
LED driver (backlight): integrated into MainBoard
PWM LED driver: MAX16814
MOSFET LED driver: AP18T10GH (100V, 9A)
Power Supply (PSU): PSAA-L010A Adapter 24V 2.5A
MainBoard: EAX64331102 (0) EBR74234674
IC MainBoard: LGE2111-T8, 24C256, W25Q80BVSIG
Tuner: TDSS-G101D EBL61060001
Control: IR: LW4500 LV2500 LK550_V1.7
Technical Specifications 22LV2500
LG 22LV2500
General repair guidelines for TV LCD LED
Possible manifestations of defects
- LG 22LV2500 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.
In such cases, the PSAA-L010A power supply is usually faulty.
The owner of a TV can purchase an external power supply unit such as PSAA-L010A 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, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often 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, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the EAX64331102 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 attempts to repair the MB board (SSB), it is necessary to check the serviceability of its elements - LGE2111-T8, 24C256, W25Q80BVSIG which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before replacing the TDSS-G101D EBL61060001 tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention TV owners! Attempts at self-repair of LG 22LV2500 are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram LG 22LV2500 Chassis LD01R MODEL: 22LV2500/250A/250N/250U-ZG
To reduce the backlight current in LED drivers with a PWM controller MAX16814 (TSSOP20 MAX16814B), it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (SETI) to the housing. The maximum current in each of the four channels (in milliamps) for the resistance Rseti (in kilo-ohms) is determined from the ratio 1500 / Rset.
More details on this page
The appearance of the MainBoard EAX64331102 is shown in the figure below:EAX64331102
Main features of the device LG 22LV2500:
Installed matrix (LED-panel) M215HGE-L10 Rev. C1.
The matrix control uses the Timing Controller (T-CON) M215HGE-L10-X + C.
To power the backlight LEDs, a converter is used, combined with the EAX64331102 main board, controlled by the MAX16814 PWM controller. As power elements of the LED driver, keys of the type AP18T10GH (100V, 9A) are used.
An external source such as PSAA-L010A Adapter 24V 2.5A is used to power all internal components of the LG 22LV2500 TV.
MainBoard - the main board (motherboard) is an EAX64331102 module, using LGE2111-T8, 24C256, W25Q80BVSIG chips and others.
Tuner TDSS-G101D EBL61060001 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: M215HGE-L10
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V