Technical description and composition of the DNS M39DM8 TV, panel type and modules used. The composition of the modules.DNS LED
Model: M39DM8
Chassis / Version: CV9202H-TPW
Panel: V390HJ1-P02 Rev C1 // V390HJ1-P01
LED backlight: MKN-DLED385-A02-5PCS-L / R
T-CON: V390HJ1-XC01
LED driver (backlight): CVB39003
Power Supply (PSU): CVB39003 // KW-PLE390402A
PWM Power: PWM SOT23-6
MOSFET Power: SMK0765F (15NK60)
MainBoard: CV9202H-TPW // TP.SIS231.PT85 // T.MSD309.BA3T
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
Tuner: ST03WS-2A-E
Specifications M39DM8
DNS M39DM8
General recommendations for TV LCD LED repair
Possible manifestations of defects
- DNS M39DM8 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or blink, and does not respond to the remote control and control buttons.
In such cases, the fault should be looked for primarily in the CVB39003 power supply module. It is necessary to measure its secondary output voltages, and in their absence, check the serviceability of the power switches (SMK0765F (15NK60)) of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse usually breaks off.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, supply, frequency setting, damper ... as well as elements of Negative Feedback Stabilization. The PWM microcircuit (PWM) PWM SOT23-6 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of 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.
- 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-TPW motherboard should begin with checking the stabilizers and power converters necessary 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 - SPI Flash: 25Q64BV; which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its pins with the board (detected by warming up).
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the ST03WS-2A-E tuner outputs. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Owners and users of the DNS M39DM8 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!
DNS M39DM8, V390HJ1-P02 Rev C1, T.MSD309.BA3T, KW-PLE390402A/
DNS M39DM8 Panel: V390HJ1-P01 R0HS; Backlight: Leds 6V - RF-AH390B32-0601R-01 IC-A-KKL39D073R, RF-AH390B32-0601L-01 IC-A-KKL39D073L; Ti-Con: V390HJ1-XC01
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> DNS M39DM8, Main: TP.SIS231.PT85T
The appearance of the MainBoard CV9202H-TPW is shown in the figure below:CV9202H-TPW
CV9202H-TPW can be used in TVs:
AKAI LEA-39J29P (Panel HF390BGA-C1), BBK 32LEM-1001/T2C (Panel CX315DLEDM), DNS M39DM8 (Panel V390HJ1-P02 Rev C1), ERISSON 32LEE17 (Panel 720p HD 1366x768), FUSION FLTV-32T22 (Panel ST3151A05), FUSION FLTV-28T20 (Panel LCM-SM275TK301 (D0306)), FUSION FLTV-28T22 (Panel TH280L321-04), FUSION FLTV-32T23 (Panel ST3151A04-1 / Ver.2.4), FUSION FLTV-32T20 (Panel V320BK1-PS5 Rev.C7), TELEFUNKEN TF-LED40S28T2 (Panel CX400DLEDM), TELEFUNKEN TF-LED29S30T2 (Panel V290BJ1-XC01 CX290DLEDM), TELEFUNKEN TF-LED40S6T2 (Panel CX400DLEDM).
External view of the power supply
Main features of the DNS M39DM8 device:
Installed matrix (LED panel) V390HJ1-P02 Rev C1 or V390HJ1-P01.
Matrix control uses Timing Controller (T-CON) V390HJ1-XC01.
The LED driver CVB39003 is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the DNS M39DM8 TV is carried out by the CVB39003 power module, or its analogs using PWM SOT23-6 microcircuits and power switches of the SMK0765F (15NK60) type.
MainBoard - the main board (motherboard) is a CV9202H-TPW module using CPU: SIS231 chips, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
The ST03WS-2A-E tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V390HJ1-P02
Type: a-Si TFT-LCD, CELL
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 3.5%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.8% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
DNS TV M39DM8 with LCD V390HJ1-P02, diagonal 39 "(99 cm) in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum to minimum brightness is 5000: 1. The LCD panel uses direct pixel backlighting with back-mounted LEDs - Direct LED.
The V390HJ1-P02 Rev C1 matrix and the MainBoard CV9202H-TPW 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, MPEG4, DivX, MKV, JPEG.
Speaker power 24 W (2x12 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 the DVB-T, DVB-C, DVB-T2 standards.
The power consumed by the TV operating in mains mode is 100 W. Power supply CVB39003.
Dimensions: With stand 900x592x210 mm, Without stand 900x540x80 mm.
TV weight: 9.5 kg.
Attention! The panel V390HJ1-P02 Rev C1 of the DNS M39DM8 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.