Technical description and composition of the LG 22LE3300 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 22LE3300 ZA
Chassis / Version: LD01A
Panel: LC216EXN (SC) (A1)
T-CON: SW0638, BUF08822
LED driver (backlight): integrated into T-CON
PWM LED driver: MAX16814
Power Supply (PSU): Adapter 24V 3.4A
PWM Power: PWM
MainBoard: EAX61524501 (15)
IC MainBoard: CPU: LGE107D; DRAM: K4B1G1646E-HCH9; NAND Flash: H27U1G8F2BTR-BC; SPI Flash: 25Q80; EEPROM: CAT24WC08W
Tuner: TDTJ-S001D
Specifications 22LE3300
LG 22LE3300
General repair guidelines for TV LCD LED
In the case when the 22LE3300 does not turn on, does not respond to the remote control and the front panel buttons, does not blink lights and does not show any signs of operability, the Adapter 24V 3.4A power supply module is probably faulty in this case. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter for the LC216EXN (SC) panel backlight assembly (A1)).
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
In cases of attempts to repair the motherboard EAX61524501 (15), it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating.
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: LGE107D; 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.
The TDTJ-S001D tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners and users of the LG 22LE3300 TV must 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!
SCHEMATIC MANUAL --------------------> LG CHASSIS: LD01A; MODEL: 22LE3300/3308, 22LE3300/3308-ZA, 22LE330N/3400, 22LE330N/3400-ZA, 22LE3310 22LE3310-ZB
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.
The appearance of the MainBoard EAX61524501 is shown in the figure below:EAX61524501
EAX61524501 can be used in TVs:
LG 19LE3400 (Panel LC185EXN SC A1), LG 19LE3300 (Panel LC185EXN (SC)(A1)), LG 22LE3300 ZA (Panel LC216EXN (SC)(A1)), LG 19LD350 (Panel M185B1-L02).
Main features of the device LG 22LE3300:
Installed matrix (LED-panel) LC216EXN (SC) (A1).
The matrix control uses the Timing Controller (T-CON) SW0638.
The LED driver integrated is used to power the backlight LEDs, it is controlled by the PWM controller MAX16814.
To power all the internal components of the LG 22LE3300 TV, an external adapter type 24V 3.4A is used using PWM chips.
MainBoard - the main board (motherboard) is an EAX61524501 module, using CPU chips: LGE107D; 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: 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
