Technical description and composition of the ERISSON 39LET15 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 39LET15
Chassis / Version: 40-0MS82L-MAB2LG
Panel: LVW390AUOT E2 V12
MainBoard: 40-0MS82L-MAB2LG
IC MainBoard: Flash 25Q32FVSIG
Tuner: 07-389SI3-NF4G XF-3SA-H
Specifications 39LET15
ERISSON 39LET15
General repair guidelines for TV LCD LED
Repair of the ERISSON 39LET15 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the power supply module malfunctions, the external manifestations may be different, for example, ERISSON 39LET15 does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. 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.
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 39LET15 TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the LVW390AUOT E2 V12 panel is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
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.
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.
The 40-0MS82L-MAB2LG motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace Flash 25Q32FVSIG elements. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner 07-389SI3-NF4G is established after checking the software and all the supply voltages at its terminals.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
FIRMWARE FOR SPI FLASH -----------> ERISSON 39LET15 , Main: 40-0MS82L-MAB2LG, Panel: LVW390AUOT E2 V12
The appearance of the MainBoard 40-0MS82L-MAB2LG is shown in the figure below:40-0MS82L-MAB2LG
40-0MS82L-MAB2LG can be used in TVs:
ERISSON 39LET15 (Panel LVW390AUOT E2 V12), FUSION FLTV-40C10 (Panel T390XVN01.0 LVW390AUOT E2 V9).
Main features of the ERISSON 39LET15 device:
Installed matrix (LED-panel) LVW390AUOT E2 V12.
The required supply voltage for all nodes of the TV ERISSON 39LET15 provides a switching power supply.
MainBoard - the main board (motherboard) is a 40-0MS82L-MAB2LG module, using Flash 25Q32FVSIG chips and others.
Tuner 07-389SI3-NF4G XF-3SA-H provides the reception of television programs and tuning to channels.
Trademark: ERISSON, Model: 39LET15.
Shortly from the TV: LCD, 720p HD, diagonal 39 "(99 cm), TFT TN, has HDMI, has USB, backlight type: Edge LED.
The composition uses MainBoard 40-0MS82L-MAB2LG and an LCD panel (matrix) LVW390AUOT E2 V12.
Technical description
The ERISSON 39LET15 TV with an LVW390AUOT LCD display, diagonal size 39 "(99 cm) 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 analog systems 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 10 W (2x5 W) provides 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 x2, audio x2, 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: 1360x768.
Overall dimensions: 898x541x102 mm.
The mass of the TV: 7.65 kg.
Attention! The LVW390AUOT E2 V12 panel of an ERISSON 39LET15 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
