Tuesday 14 April 2020

REPAIR / SERVICING TV ERISSON 39LES67

Technical description and composition of the ERISSON 39LES67 TV, type of panel and applicable modules. The composition of the modules.
ERISSON LED
Model: 39LES67
Chassis / Version: 5800-A6M62E-0P00
Panel: RDL390HY FHD
MainBoard: 5800-A6M62E-0P00
IC MainBoard: CPU MSD6306PUN, Flash 25Q32
Specifications 39LES67
ERISSON 39LES67
General repair guidelines for TV LCD LED
Repair of the ERISSON 39LES67 TV should begin with a careful external examination of all its constituent elements and modules. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the absence of any signs of operability, when the ERISSON 39LES67 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 power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
Power switches in pulsed 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 39LES67 does not have an image, but there is sound, the backlight LEDs of the RDL390HY FHD panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
On the motherboard 5800-A6M62E-0P00, in the event of a malfunction, you should first check the performance of all the stabilizers or power converters of the microcircuits and, if necessary, update 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 elements of the CPU MSD6306PUN, Flash 25Q32. BGA chip malfunctions are usually easy to detect by warming up.
Owners and users of the ERISSON 39LES67 television must 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!


FIRMWARE FOR SPI FLASH  ----------->   ERISSON 39LES67, Main: 5800-A6M62E-0P00, Panel: RDL390HY FHD

The appearance of the MainBoard 5800-A6M62E-0P00 is shown in the figure below:
5800-A6M62E-0P00
Main features of the ERISSON 39LES67 device:
Installed matrix (LED panel) RDL390HY FHD.
The required supply voltage for all nodes of the TV ERISSON 39LES67 provides a switching power supply.
MainBoard - the main board (motherboard) is a 5800-A6M62E-0P00 module, using CPU chips MSD6306PUN, Flash 25Q32 and others

 Trademark: ERISSON, Model: 39LES67.
Shortly from the TV: LCD, 720p HD, diagonal 39 "(99 cm), TFT TN, HDMI connectors: 3, USB connectors: 2, backlight type: Edge LED.
The composition includes MainBoard 5800-A6M62E-0P00 and an LCD panel (matrix) RDL390HY FHD.

Technical description
ERISSON 39LES67 TV with RDL390HY LCD, 39 "(99 cm) diagonal size in 16: 9 format. The required screen brightness of 280 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 5000: 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, MKV, JPEG.
The power of the sound system 12 W (2x6 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: 896x577x220 mm.
TV Weight: 10.3 kg.
Attention! The panel of the RDL390HY FHD LED TV ERISSON 39LES67 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.