Technical description and composition of the DAEWOO L24S631VKE TV, panel type and applicable modules. The composition of the modules.DAEWOO LED
Model: L24S631VKE
Chassis / Version: MSD3463-T4C1
Panel: K236WD8 (V236BJ1-P01)
LED backlight: 4708-K236WD-A1213K01
T-CON: 6870S-2633B LC236DXY (SK) (M1)
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4286
Power Supply (PSU): integrated into MainBoard
PWM Power: LNK6777
MainBoard: MSD3463-T4C1
IC MainBoard: SPI Flash: MX25L6406E, Audio: TPA3110LD2
Tuner: ST43WS-2A-E
Control: IR: 9015-11261F
Technical Specifications L24S631VKE
DAEWOO L24S631VKE
General repair guidelines for TV LCD LED
Possible malfunctions
- DAEWOO L24S631VKE TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
The malfunction in such cases should be sought in the elements of the power source - the network voltage converter (AC / DC), which is located on the MainBoard MSD3463-T4C1 main board. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard MSD3463-T4C1 should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - SPI Flash: MX25L6406E, Audio: TPA3110LD2 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the tuner ST43WS-2A-E and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MSD3463-T4C1 Power supply & LED-Driver
FIRMWARE FOR SPI FLASH -----------> DAEWOO L24S631VKE, Main: MSD3463-T4C1, Panel: K236WD8 (V236BJ1-P01)
The appearance of the MainBoard MSD3463-T4C1 is shown in the figure below:MSD3463-T4C1
Main features of the DAEWOO L24S631VKE device:
Installed matrix (LED-panel) K236WD8 (V236BJ1-P01).
The matrix control uses the Timing Controller (T-CON) 6870S-2633B.
To power the backlight LEDs, a converter is used, combined with the main board MSD3463-T4C1, controlled by the OB3350CP PWM controller. As power elements of the LED driver, keys of the AOD4286 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using LNK6777 microcircuits.
MainBoard - the main board (motherboard) is an MSD3463-T4C1 module using SPI Flash chips: MX25L6406E, Audio: TPA3110LD2 and others.
The ST43WS-2A-E tuner provides TV reception and channel tuning.
Brand: DAEWOO, Model: L24S631VKE.
Briefly from the TV: LCD, LED backlight, 23.6 ", 1366x768, 720p HD, DVR, sound: 8W, HDMI connectors: 2.
The composition uses MainBoard MSD3463-T4C1 and LCD-panel K236WD8. Power supply combined with MainBoard
DAEWOO L24S631VKE LED TV with K236WD8 LCD display, diagonal size 23.6 "(60 cm) in 16: 9 format. The required screen brightness of 240 cd / m² is provided by LED backlight LED. The LED display backlight is implemented in the model’s display technology. Viewing is possible images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready) Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the speaker system of sound 8 W (2x4 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, MHL, USB. An output for connecting headphones is provided. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 30 watts.
Overall dimensions: with stand 555x363x136 mm, without stand 555x334x65 mm.
TV mass: with stand: 3 kg, without stand: 2.5 kg.
Attention! The K236WD8 panel of a DAEWOO L24S631VKE 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.