Technical description and composition of the ERISSON 24LET35 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 24LET35
Chassis / Version: TP.MS18VG.P77 MS82PT
Panel: LVW240CMOT E1 V2
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6 LD7536R
MainBoard: TP.MS18VG.P77 MS82PT
IC MainBoard: CPU: MST3M182VGC-LF-TZ, Flash: 25Q32
Tuner: R620D
Specifications 24LET35
ERISSON 24LET35
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the ERISSON 24LET35 TV, as well as the external elements of the housing. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
In cases where the ERISSON 24LET35 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 there is no processor power on motherboard (a typical defect of some ERISSON TV models). 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.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
Sometimes the ERISSON 24LET35 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the converter for the backlight LEDs of the LVW240CMOT E1 V2 panel, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
Repair or diagnostics of the TP.MS18VG.P77 MS82PT motherboard should begin by checking the stabilizers or power converters of its microcircuit. If necessary, you should update the software (software).
When repairing an MB board, you need to check its components Flash 25Q32. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
It should be remembered! Attempts to repair the ERISSON 24LET35 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> ERISSON 24LET35 , Main: TP.MS18VG.P77 MS82PT, Panel: LVW240CMOT E1 V2
The appearance of MainBoard TP.MS18VG.P77 is shown in the figure below:TP.MS18VG.P77
TP.MS18VG.P77 can be used in TVs:
ERISSON 24LET35 (Panel LVW240CMOT E1 V2), ERISSON 19LET35 (Panel M185XTN01.3), FUSION FLTV-24C10 (Panel LVW230SSOT E1 V2), FUSION FLTV-32C10 (Panel LVW320CSOT E81 V7), HYUNDAI H-LED32V19 (Panel LVW320CSOT E45 V10), HYUNDAI H-LED32V23 (Panel LVW320C80T E64 V5), TCL 19T2100 (Panel M185XTN01.2), TELEFUNKEN TF-LED32S23 (Panel LVW320CS0T E146 V1), THOMSON 32B2600 (Panel LVW320C8OT EB1), THOMSON 28B2500 (Panel LVW280CSOT E13V1).
Main features of the ERISSON 24LET35 device:
Installed matrix (LED-panel) LVW240CMOT E1 V2.
To power the backlight LEDs, a converter is used, combined with the main board TP.MS18VG.P77, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter using PWM SOT23-6 LD7536R microcircuits.
MainBoard - the main board (motherboard) is a TP.MS18VG.P77 module, using CPU chips: MST3M182VGC-LF-TZ, Flash: 25Q32 and others.
The R620D tuner provides TV reception and channel tuning.
Trademark: ERISSON, Model: 24LET35.
Shortly from the TV: LCD, 720p HD, diagonal 24 "(61 cm), has HDMI, has USB, backlight type: Edge LED.
The composition uses MainBoard TP.MS18VG.P77 MS82PT and an LCD panel (matrix) LVW240CMOT E1 V2. The power supply is combined with the MainBoard.
ERISSON 24LET35 TV with LVW240CMOT LCD, 24 "(61 cm) diagonal in 16: 9 format. The required brightness of the screen is 220 cd / m² LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. The LED panel of this TV is equipped with an end LED backlight - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of 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, Xvid, DivX, MKV, JPEG.
The power of the sound system 10 W (2x5 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 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: 640x480, 800x600, 1024x768, 1360x768.
Overall dimensions: 556x387x160 mm.
TV Weight: 4.5 kg.
Attention! The LVW240CMOT E1 V2 panel of an ERISSON 24LET35 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.