Technical description and composition of the ERISSON 29LES65 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 29LES65
Chassis / Version: 5800-A8M57A-OP20
Panel: SK28M31A (L)
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: TEA1733P
MainBoard: 5800-A8M57A-OP20 VER00.02
IC MainBoard: Spi Flash: 25q32, 25f10
Specifications 29LES65
ERISSON 29LES65
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular ERISSON 29LES65, it is advisable to start with a careful external examination of internal and external elements. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In cases where the ERISSON 29LES65 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink and there are no sounds and no signs of operability at all, the power module is most likely faulty or the processor is not powered motherboard (a typical defect of some ERISSON TV models). 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.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the ERISSON 29LES65 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the SK28M31A (L) panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
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.
Diagnostics and repair of the motherboard 5800-A8M57A-OP20 VER00.02 is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - Spi Flash: 25q32, 25f10 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
For owners of the 29LES65 TV, we recommend that you contact qualified professionals with work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 29LES65, Main: 5800-A8M57A-OP20 VER00.02, Panel: SK28M31A(L)
The appearance of the MainBoard 5800-A8M57A-OP20 is shown in the figure below:5800-A8M57A-OP20
5800-A8M57A-OP20 can be used in TVs:
ERISSON 40LES73 (Panel V400HJ6-PE1 Full HD), ERISSON 32LES73 (Panel ST3151A05-5 (SDL320HY)), ERISSON 32LES65 (Panel RDL320HY (AD0-301)), ERISSON 39LES65 (Panel RDL390HY (T390XVN01.0 39T11-C02)), ERISSON 29LES65 (Panel SK28M31A (L)), ERISSON 32LES69 (Panel ST3151A05-5 SDL320HY (CD0-605)(02)), ERISSON 40LES69 (Panel V400HJ6-PE1 Rev.C1).
Main features of the ERISSON 29LES65 device:
The matrix (LED panel) SK28M31A (L) is installed.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A8M57A-OP20.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using TEA1733P microcircuits.
MainBoard - the main board (motherboard) is a 5800-A8M57A-OP20 module, using Spi Flash chips: 25q32, 25f10 and others.
Trademark: ERISSON, Model: 29LES65.
Briefly from the TV: LCD, 720p HD, diagonal 29 "(74 cm), HDMI: 2, USB: 2, there is support for DVB-T2, backlight type: Edge LED.
The composition uses the MainBoard 5800-A8M57A-OP20 VER00.02 and the LCD panel (matrix) SK28M31A (L). The power supply is combined with the MainBoard.
ERISSON 29LES65 TV with a SK28M31A LCD display, diagonal size 29 "(74 cm) 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. The LED panel of this TV has an end LED backlight - 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 x PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, Xvid, MKV, JPEG.
The power of the sound system 6 W (2x3 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), audio x2, component, VGA, HDMI x2, 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.
A digital tuner is capable of receiving television channels in the DVB-T, DVB-T2 standards.
Overall dimensions: 643x439x190 mm.
Mass of the TV: 4.1 kg.
Attention! The panel of SK28M31A (L) ERISSON 29LES65 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.
