Technical description and composition of the ERISSON 24LET30 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 24LET30
Chassis / Version: 40-MS82AU-MAA2XG
Panel: T240XVN01.0
MainBoard: 40-MS82AU-MAA2XG
IC MainBoard: CPU: MST6E182VS-LF-Z1; SPI Flash: 25Q32;
Tuner: TDQ-3CB
Specifications 24LET30
ERISSON 24LET30
General repair guidelines for TV LCD LED
An external examination of the external and internal elements should be carried out in a timely manner before the start of operations for their dismantling. From the visible external changes in the state of the components, it is often possible to determine the further direction of the troubleshooting before making the necessary measurements. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the absence of any signs of operability, when the ERISSON 24LET30 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the ERISSON 24LET30 does not have an image, but there is sound, there may be a malfunction of the T240XVN01.0 backlight LEDs or their power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
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.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Repair of the 40-MS82AU-MAA2XG motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Board repair and replacement of CPU chips: MST6E182VS-LF-Z1; SPI Flash: 25Q32; are made in the presence of the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the TDQ-3CB tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
FIRMWARE FOR SPI FLASH -----------> ERISSON 24LET30, Main: 40-MS82AU-MAA2XG, Panel: T240XVN01.0
The appearance of the MainBoard 40-MS82AU-MAA2XG is shown in the figure below:40-MS82AU-MAA2XG
Main features of the ERISSON 24LET30 device:
Installed matrix (LED-panel) T240XVN01.0.
The required supply voltage for all nodes of the TV ERISSON 24LET30 provides a switching power supply.
MainBoard - the main board (motherboard) is a 40-MS82AU-MAA2XG module using CPU chips: MST6E182VS-LF-Z1; SPI Flash: 25Q32; and others.
The TDQ-3CB tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T240XVN01.0
Type: a-Si TFT-LCD, Panel
Diagonal size: 24.0 inch
Resolution: 1366x768, WXGA
Display Mode: VA, Normally Black, Transmissive
Active Area: 531.72x298.94 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit)
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 10S4P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Trademark: ERISSON, Model: 24LET30.
Short from TV: LCD, 720p HD, 24 "(61 cm) diagonal, backlight type: Edge LED.
The composition uses MainBoard 40-MS82AU-MAA2XG and LCD-panel (matrix) T240XVN01.0.
ERISSON 24LET30 TV with T240XVN01.0 LCD, 24 "(61 cm) diagonal size of 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. Edge LED backlighting is realized in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in an analog system . Ah PAL, SECAM, NTSC Image processing and the formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:.. MP3, JPEG Stereo realized by two built-in speakers using audio NICAM STEREO processing system..
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), Bluetooth. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV in the operating mode from the network is 48 watts.
Overall dimensions: 602x392x47 mm.
Attention! The T240XVN01.0 panel of an ERISSON 24LET30 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.