Technical description and composition of the DNS V39DS8100S TV, panel type and modules used. The composition of the modules.DNS LED
Model: V39DS8100S
Chassis / Version: CV9202H-CSM
Panel: T390HVD01.1 DLED39-MZ-020
LED backlight: JC-MY23DL5D-0006 3BL-T7384102-002B
T-CON: 39T01-C03 T390HVN01.0 and 39T01-S04 T390HVN01.0 XL
LED driver (backlight): integrated into PSU
PWM LED driver: OB3350CP
Power Supply (PSU): LK-PL320408J CQC04001011196
PWM Power: OB2273MP
MOSFET Power: 7N80
MainBoard: CV9202H-CSM
IC MainBoard: SPV9202, 25Q64, TPA3110LD2
Specifications V39DS8100S
DNS V39DS8100S
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- DNS TV V39DS8100S does not turn on at all. Control lamps do not light up or blink. The remote control and buttons on the control panel are unresponsive.
With such manifestations, a malfunction is most likely found in the LK-PL320408J power supply module. Its output voltages should be measured and, in their absence, the serviceability of the power switches (7N80) and rectifier diodes in the converters should be checked for the probability of a short circuit.
In the event of thermal or avalanche breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often immediately breaks and, less often, the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch can also be the PWM OB2273MP. It is checked only by replacing it with a known good one.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and disappear immediately.
The malfunction in most of such cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts is required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light one 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken through in the K / Z.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the CV9202H-CSM motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - SPV9202, 25Q64, TPA3110LD2, which may require replacement with new ones. If a BGA processor is installed, there is a possibility that the soldering of the contacts of its pins with the board is broken (detected by warming up).
Attention to users! Self-repair of the DNS V39DS8100S TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> DNS V39DS8100S, Main: CV9202H-CSM
The appearance of the MainBoard CV9202H-CSM is shown in the figure below:CV9202H-CSM
External view of the power supply
Main features of the DNS V39DS8100S device:
Installed matrix (LED panel) T390HVD01.1 DLED39-MZ-020.
Matrix control uses Timing Controller (T-CON) 39T01-C03.
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by the OB3350CP PWM controller.
The formation of the necessary supply voltages for all nodes of the DNS V39DS8100S TV is carried out by the LK-PL320408J power module, or its analogs using OB2273MP microcircuits and 7N80 power switches.
MainBoard - the main board (motherboard) is a CV9202H-CSM module, using SPV9202, 25Q64, TPA3110LD2 and others.
DNS TV V39DS8100S with LCD T390HVD01.1, 39 "(99 cm) diagonal, 16: 9 format. Contrast - The ratio of maximum to minimum brightness is 5000: 1. The LCD panel uses direct pixel backlighting with rear LEDs - Direct LED.
The T390HVD01.1 DLED39-MZ-020 matrix and the MainBoard CV9202H-CSM software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at 1080p (Full HD).
V39DS8100S TV is equipped with SMART software, built-in applications and the ability to work on the Internet. 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, MKV, JPEG. Stereo sound is provided by two built-in 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), component, SCART, RGB, VGA, HDMI x2, USB x3, Ethernet (RJ-45). A headphone output is provided. 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 the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The TV uses the LK-PL320408J power supply.
Dimensions: With stand 720x520x220 mm, Without stand 720x460x80 mm.
Attention! Panel T390HVD01.1 DLED39-MZ-020 LED TV DNS V39DS8100S 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.