Technical description and composition of the ERISSON 32LES73 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 32LES73
Chassis / Version: 5800-A8M57A-OP20
Panel: ST3151A05-5 (SDL320HY)
LED driver (backlight): integrated into MainBoard
PWM LED driver: TPS61196
Power Supply (PSU): integrated into MainBoard
PWM Power: TEA1733P
MainBoard: 5800-A8M57A-OP20 VER00.02
IC MainBoard: Spi Flash: 25Q32
Specifications 32LES73
ERISSON 32LES73
General repair guidelines for TV LCD LED
Repair of the ERISSON 32LES73 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the 32LES73 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light up or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some ERISSON models. 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.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If the ERISSON 32LES73 does not have an image, but there is sound, a malfunction of the ST3151A05-5 (SDL320HY) panel backlight LEDs or their power converter may be malfunctioning. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the lines and connectors.
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 or diagnostics of the 5800-A8M57A-OP20 VER00.02 motherboard should be started by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - Spi Flash: 25Q32. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Once again, remind users! Attempts to self-repair a TV ERISSON 32LES73 without the appropriate qualifications and experience can lead to its complete unrepairability!
FIRMWARE FOR SPI FLASH -----------> ERISSON 32LES73, Main: 5800-A8M57A-OP20 VER00.02, Panel: ST3151A05-5 (SDL320HY)
To reduce the backlight current in LED drivers with a TPS61196 controller, it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (ISET) to the housing. The maximum current in each of the six channels (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 3992 * 1.229V / Rset. In channels connected in parallel, the currents add up.
Repair MainBoard
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 32LES73 device:
Installed matrix (LED panel) ST3151A05-5 (SDL320HY).
To power the backlight LEDs, a converter is used, combined with the main board 5800-A8M57A-OP20, controlled by the TPS61196 PWM controller.
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 and others.
Additional technical information about the panel:
Brand: CSOT
Model: ST3151A05-5
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: HVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 7.16% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 62%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit)
Voltage: 12.0V
ERISSON 32LES73 TV with ST3151A05-5 LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required brightness of the screen is 230 cd / m² LED backlight LED. Dynamic contrast ratio 3000: 1 is achieved by special control of the LEDs. In The LED panels of this TV are equipped with edge LED backlighting - 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 analog PAL, SECAM, NTSC systems. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound system 12 W (2x6 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-T2 standards.
Overall dimensions: 737x439x90 mm.
The mass of the TV: 5.15 kg.
Attention! The ST3151A05-5 (SDL320HY) panel of the ERISSON 32LES73 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.