Technical description and composition of the DAEWOO L24V639VAE TV, type of panel and applicable modules. The composition of the modules.DAEWOO LED
Model: L24V639VAE
Chassis / Version: TP.MS3663S.PA671
Panel: HV236WHB-N41
LED backlight: CY-240D-2X5 PB04D397103BL041-001H
T-CON: 47-6001451
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: TP.MS3663S.PA671
IC MainBoard: CPU: MSD3663LSA-Z1, SPI FLASH MX25L6436F, AUDIO: YD1517P
Tuner: CDT-9NT372-RF01
Technical Specifications L24V639VAE
DAEWOO L24V639VAE
General repair guidelines for TV LCD LED
Possible manifestations of defects
- DAEWOO L24V639VAE TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In this case, the main Switching Power Supply, an AC / DC network voltage converter, whose elements are located on the MainBoard TP.MS3663S.PA671 main board, may be faulty. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches (TO-252) and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM SOT23-6 PWM controllers, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and all the other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. Often the cause is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver is malfunctioning.
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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the TP.MS3663S.PA671 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: MSD3663LSA-Z1, SPI FLASH MX25L6436F, AUDIO: YD1517P. Defective components should be replaced.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner CDT-9NT372-RF01. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Owners and users of the DAEWOO L24V639VAE TV should 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!
Repair MainBoard
The appearance of MainBoard TP.MS3663S.PA671 is shown in the figure below:
TP.MS3663S.PA671
Main features of the device DAEWOO L24V639VAE:
Installed matrix (LED-panel) HV236WHB-N41.
The matrix control uses the Timing Controller (T-CON) 47-6001451.
To power the backlight LEDs, a converter is used, combined with the TP.MS3663S.PA671 main board, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is a TP.MS3663S.PA671 module, using CPU chips: MSD3663LSA-Z1, SPI FLASH MX25L6436F, AUDIO: YD1517P and others.
The tuner CDT-9NT372-RF01 provides the reception of television programs and tuning to channels.
Brand: DAEWOO, Model: L24V639VAE.
Shortly from the TV: LCD, 720p HD, diagonal 24 "(61 cm), there is HDMI, there is USB, there is support for DVB-T2.
Manufacturer: HORIZON plant, Belarus, Minsk, st. S. Kovalevskoy, 62. Developer: Dongbu Daewoo Electronics Corporation.
The composition uses MainBoard TP.MS3663S.PA671 and LCD-panel HV236WHB-N41. Power supply combined with MainBoard
Technical description
DAEWOO L24V639VAE LED TV with a 24 "(61 cm) diagonal LCD display in 16: 9 format. The required screen brightness of 180 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000: 1. LED display technology is implemented in the model’s display manufacturing technology. High quality HD images can be viewed at 1366x768 pixels in 720p (HD Ready) graphic decomposition standard. Supported media file formats: MP3, MPEG4, DivX, MKV, JPEG.
The power of the acoustic system of sound 6 W (2x3 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), audio x2, component, HDMI, 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.
Overall dimensions: with a support of 550x367x173 mm, without a support of 550x335x63 mm.
Mass of the TV: 2.4 kg.
Attention! The panel of the DAEWOO L24V639VAE 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.