Technical description and composition of the ERISSON 24LET11 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 24LET11
Chassis / Version: 40-MTK23L-MAI2XG
Panel: V236H1-LE2
Power Supply (PSU): FAN6754
MainBoard: 40-MTK23L-MAI2XG
IC MainBoard: CPU: MT8223LFMU 1134; SPI Flash: 25Q32B;
Tuner: ERI-TUNP11N8R-MA1
Specifications 24LET11
ERISSON 24LET11
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the ERISSON TV, made on the basis of the 40-MTK23L-MAI2XG chassis, it is advisable to start with an external examination of its external and internal elements. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. 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 24LET11 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's FAN6754 power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
Sometimes the ERISSON 24LET11 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit). Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair of the 40-MTK23L-MAI2XG 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. In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MT8223LFMU 1134; SPI Flash: 25Q32B; 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).
Remember! Attempts of self-repair by users of the ERISSON 24LET11 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 24LET11 , Main: 40-MTK23L-MAI2XG, Panel: V236H1-LE2
The appearance of the MainBoard 40-MTK23L-MAI2XG is shown in the figure below:40-MTK23L-MAI2XG
40-MTK23L-MAI2XG can be used in TVs:
ERISSON 24LET11 (Panel V236H1-LE2), ERISSON 19LET21 (Panel M185B3-LA1).
Main features of the ERISSON 24LET11 device:
Installed matrix (LED-panel) V236H1-LE2.
The formation of the necessary supply voltages for all nodes of the ERISSON 24LET11 TV is carried out by the FAN6754 power module, or its analogs.
MainBoard - the main board (motherboard) is a 40-MTK23L-MAI2XG module using CPU chips: MT8223LFMU 1134; SPI Flash: 25Q32B; and others.
The tuner ERI-TUNP11N8R-MA1 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V236H1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Trademark: ERISSON, Model: 24LET11.
Shortly from the TV: LCD, 1080p Full HD, diagonal 24 "(61 cm), there is HDMI, there is USB.
The composition includes MainBoard 40-MTK23L-MAI2XG and LCD panel (matrix) V236H1-LE2.
Power Supply Unit (PSU) FAN6754 Power Supply.
ERISSON 24LET11 TV with V236H1-LE2 LCD display, 24 "(61 cm) diagonal size in 16: 9 format. The design and technical capabilities of the TV include viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p ( Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG. Stereosound realizes Xia two built-in speakers. Use audio NICAM STEREO processing system.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x3, component, VGA, HDMI, USB. 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.
Overall dimensions: With stand 769x536x196 mm, Without stand 392x260x40 mm.
Attention! The V236H1-LE2 panel of an ERISSON 24LET11 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!