Technical description and composition of the ERISSON 19LET11 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 19LET11
Chassis / Version: 40-MTK23L-MAH2XG MA1
Panel: M185XW0.1 V.6 720p HD, 1366x768
MainBoard: 40-MTK23L-MAH2XG MA1
IC MainBoard: CPU: MT8223FMU; SPI Flash: 25Q32; EEPROM: 24C32;
Tuner: F23CT-2DD-E
Specifications 19LET11
ERISSON 19LET11
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 19LET11 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module. It is necessary to measure the secondary output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the possibility of breakdown in PN semiconductor junctions.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually 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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 40-MTK23L-MAH2XG 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: MT8223FMU; SPI Flash: 25Q32; EEPROM: 24C32; . BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the tuner F23CT-2DD-E and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention TV owners! Self-repair attempts by ERISSON 19LET11 are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 19LET11 , Main: 40-MTK23L-MAH2XG MA1, Panel: 720p HD, 1366x768
The appearance of the MainBoard 40-MTK23L-MAH2XG is shown in the figure below:40-MTK23L-MAH2XG
Main features of the ERISSON 19LET11 device:
Installed matrix (LED-panel) M185XW0.1 V.6 720p HD, 1366x768.
The required supply voltage for all nodes of the TV ERISSON 19LET11 provides a switching power supply.
MainBoard - the main board (motherboard) is a 40-MTK23L-MAH2XG module, using CPU chips: MT8223FMU; SPI Flash: 25Q32; EEPROM: 24C32; and others.
The F23CT-2DD-E tuner provides TV reception and channel tuning.
ERISSON 19LET11 TV with an M185XW0.1 LCD, 19 "(48 cm) diagonal, 16: 9 format. You can view HD images at 1366x768 pixels in the standard 720p (HD Ready) graphic decomposition. Input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG. Stereo sound is realized by two built-in speakers. Used processing system udio NICAM STEREO.
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 M185XW0.1 V.6 720p HD, 1366x768 panel of an ERISSON 19LET11 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!