Technical description and composition of the DNS V40D8200 TV, panel type and modules used. The composition of the modules.DNS LED
Model: V40D8200
Chassis / Version: T.MSD309
Panel: LSC400HV02-W05
LED backlight: DTW400LL01-A, DTW400LL01-D
T-CON: 12PSQBC4LV0.0; LPF12B0; LVDS: PL.MS6M30.1B-1
LED driver (backlight): integrated into PSU
PWM LED driver: OB2273
Power Supply (PSU): LK-PL390401E
PWM Power: FAN7930 (PFC), OB2273
MOSFET Power: SMK0870F
MainBoard: T.MSD309.BA5T // T.MSD309.BA3T
IC MainBoard: Spi Flash: 25Q32FVS1G, W25X10
Specifications V40D8200
DNS V40D8200
General recommendations for TV LCD LED repair
If the LK-PL390401E power supply module fails, external manifestations may be different, for example, the DNS V40D8200 does not turn on at all and there is no indication of the control lamps on the front panel. Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the mains rectifier, as well as the large electrolytic capacitor of the mains rectifier filter.
As a rule, switches in switching power supplies (SMPS) are quite reliable and rarely fail without reasons that should be looked for by checking other circuit components - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM microcircuit is checked by replacing it with a known good one.
If the DNS V40D8200 TV does not have an image, but there is sound, a malfunction is likely in the backlight circuits of the LED panel DTW400LL01-A // LSC400HV02-W05.
Often it becomes necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
Without a special current source, it is impossible to check the line of series-connected LEDs, and it is unsafe for them to use any voltage sources over 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
Repair or diagnostics of the T.MSD309.BA5T motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update the software (software).
Attention to the owners! Attempts to repair the DNS V40D8200 TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis MSD309B Schematic diagram
The appearance of the MainBoard T.MSD309.BA5T is shown in the figure below:T.MSD309.BA5T
T.MSD309.BA5T can be used in TVs:
DNS V40D8200 (Panel LSC400HV02-W05), DNS V32D2500 (Panel TY315LK12-ACW1 V315H3-CPE6), DNS S32DSB1 (Panel T315HB01 V.1), DNS S39DSB1 (Panel V390HJ1-LE1).
External view of the power supply
Main features of the DNS V40D8200 device:
Installed matrix (LED panel) LSC400HV02-W05.
Matrix control uses Timing Controller (T-CON) 12PSQBC4LV0.0 ;.
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by the OB2273 PWM controller.
The formation of the necessary supply voltages for all nodes of the DNS V40D8200 TV is carried out by the LK-PL390401E power module, or its analogs using FAN7930 (PFC), OB2273 microcircuits and power switches of the SMK0870F type.
MainBoard - the main board (motherboard) is a T.MSD309.BA5T module, using Spi Flash chips: 25Q32FVS1G, W25X10 and others.
The LSC400HV02-W05 matrix and the MainBoard T.MSD309.BA5T software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x4, USB. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768, 1920x1080. The digital tuner is capable of receiving television channels in DVB-T, DVB-C, DVB-T2 standards.
The power consumed by the TV operating in mains mode is 90 W. Power supply LK-PL390401E.
Dimensions: With stand 910x592x220 mm, Without stand 910x524x60 mm.
TV weight: 12.4 kg.
Attention! The panel LSC400HV02-W05 of the DNS V40D8200 LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.