Technical description and composition of the ERISSON 29LES67 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 29LES67
Chassis / Version: 5800-A6M61E-0P20
Panel: SK28M31A (D)
T-CON: MT3151A05-3-XC-1; 6861AA0, K2N358.1, CS11102
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
MainBoard: 5800-A6M61E-0P20 Ver 00.02
IC MainBoard: MSD6306PUN
Specifications 29LES67
ERISSON 29LES67
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 29LES67 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard 5800-A6M61E-0P20 board. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 5800-A6M61E-0P20 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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - MSD6306PUN. Defective components should be replaced.
Owners and users of the ERISSON 29LES67 TV should 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!Repair MainBoard
The appearance of the MainBoard 5800-A6M61E-0P20 is shown in the figure below:
5800-A6M61E-0P20
Main features of the ERISSON 29LES67 device:
The matrix (LED panel) SK28M31A (D) is installed.
The matrix control uses the Timing Controller (T-CON) MT3151A05-3-XC-1 ;.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A6M61E-0P20.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is a module 5800-A6M61E-0P20, using microchips MSD6306PUN and others.Trademark: ERISSON, Model: 29LES67.
Shortly from the TV: LCD, 720p HD, diagonal 29 "(74 cm), TFT TN, HDMI connectors: 3, USB connectors: 2, backlight type: Edge LED.
The composition uses MainBoard 5800-A6M61E-0P20 and LCD-panel SK28M31A (D). The power supply is combined with the MainBoard.
ERISSON 29LES67 TV with SK28M31A (D) LCD, 29 "(74 cm) diagonal size in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000 : 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 for 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 the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, MKV, JPEG.
The power of the speaker system of sound 8 W (2x4 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI x3, USB x2. An output for connecting headphones is provided. 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 digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
Overall dimensions: 643x439x190 mm.
Mass of the TV: 4.1 kg.
Attention! The panel of SK28M31A (D) LED-TV ERISSON 29LES67 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.