Technical description and composition of the LG 22LS3500 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 22LS3500 22LS3500-ZA
Chassis / Version: LD21A
Panel: V216BG1-LE1 REV.C1
LED backlight: V216BG1-LE1-TREF2
T-CON: T-CON V216BG1LE1-XC
LED driver (backlight): integrated into MainBoard
PWM LED driver: DT1641S
MOSFET LED driver: AP18T10GH
Power Supply (PSU): LCAP23 ADAPTER 24V 2.7A EAY62629201
MainBoard: EAX64702603 (1.0) EBR75205501
IC MainBoard: CPU: LGE2111A-T8, NAND: H27U1G8F2BTR-BC, APSW286ZC, SPI Flash: W25Q80BVSIG, EEPROM: 24C256
Tuner: DSS-G101D EBL61660001
Technical Specifications 22LS3500
LG 22LS3500
General repair guidelines for TV LCD LED
Possible manifestations of defects
- LG 22LS3500 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Failure in such cases should begin to be sought in the LCAP23 power supply circuits. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the 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 EAX64702603 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - CPU: LGE2111A-T8, APSW286ZC, SPI Flash: W25Q80BVSIG, EEPROM: 24C256. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner DSS-G101D EBL61660001 may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
TV users and owners need to remember that attempts to self-repair an LG 22LS3500 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram -------------------------> LG 22LS3500 Chassis LD21A.
MODELS:22LS3500, 22LS350S, 22LS3350T, 22LS3510, 22LS3500-ZA , 22LS350S-ZA , 22LS350T-ZA, 22LS3510-ZB, 22LS3590, 22LS359S, 22LS359T, 22LS3590-ZC, 22LS359S-ZC, 22LS359T-ZC.
FIRMWARE SPI FLASH, EEPROM -------------> LG 22LS3500-ZA LD21A, Panel:V216BG1-LE1.
FIRMWARE SPI FLASH -----------------------> LG 22LS3500 LC21B
To reduce the backlight current in LED drivers with a DT1641AS controller (DT1641S), you can increase the total resistance of the resistors from pin 7 (RISET) to the chassis. The exact proportional dependence may not be observed if there is additional control on this input, then the ratings should be selected empirically.
More details on this page
The appearance of the MainBoard EAX64702603 is shown in the figure below:EAX64702603
EAX64702603 can be used in TVs:
LG 26LS3500 (Panel LC260EXN (SD)(A1)), LG 26LS3510 ZB.BRUYLJU (Panel LC260EXN (SD)(A1)), LG 22LS3500 22LS3500-ZA (Panel V216BG1-LE1 REV.C1).
The appearance of the power supply
Main features of the device LG 22LS3500:
Installed matrix (LED-panel) V216BG1-LE1 REV.C1.
The matrix control uses the Timing Controller (T-CON) T-CON.
To power the backlight LEDs, a converter is used, combined with the EAX64702603 main board, controlled by the DT1641S PWM controller. As power elements of the LED driver, keys of the type AP18T10GH are used.
The formation of the necessary supply voltages for all nodes of the LG 22LS3500 TV is carried out by the LCAP23 power supply module, or its analogues.
MainBoard - the main board (motherboard) is an EAX64702603 module using CPU chips: LGE2111A-T8, NAND: H27U1G8F2BTR-BC, APSW286ZC, SPI Flash: W25Q80BVSIG, EEPROM: 24C256 and others.
Tuner DSS-G101D EBL61660001 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V216BG1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S4P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
