Technical description and composition of the DNS E19A00 TV, panel type and modules used. The composition of the modules.DNS LED
Model: E19A00
Chassis / Version: T.VST29.A2B
Panel: CX185LEDM (V185B1-PE)
LED driver (backlight): with integrated PSU
PWM LED driver: BIT3251
MOSFET LED driver: AO4616 (8pin), AOD478 (3pin)
Power Supply (PSU): MP113_REV1.3
PWM Power: PWM SOT23-6 (LPP 35)
MainBoard: T.VST29.A2B_12313 DX1517P V185B1-PE1 ROHS T1208-121 DX-102
IC MainBoard: GG2U (5), DX1517P
E19A00 Specifications
DNS E19A00
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- DNS E19A00 does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
Most likely in this case, the main switching power supply (SMPS) MP113 is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary first of all to check the power switches and rectifier diodes for possible partial or complete breakdown.
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.
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 PWM (PWM) PWM SOT23-6 (LPP 35). 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, immediately after switching on for a second, the image may appear and immediately disappear.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. 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 check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 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 one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, 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 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 T.VST29.A2B_12313 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 - GG2U (5), DX1517P 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).
Owners of the E19A00 TV are advised to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> DNS E19A00, Main: T.VST29.A2B_12313 DX1517P V185B1-PE1 ROHS T1208-121 DX-102, Panel: CX185LEDM (V185B1-PE)
The appearance of the MainBoard T.VST29.A2B_12313 is shown in the figure below:T.VST29.A2B_12313
T.VST29.A2B_12313 can be used in TVs:
DNS E19A00 (Panel CX185LEDM (V185B1-PE)), DNS E22A11 (Panel M215HGE-P02), DNS E22A00 (Panel CX215LEDM M215HGE-P01), DNS E16A20 (Panel TL156WH4 (TL)(N2)), ERISSON 24LEB15 (Panel M240HW01 VD), ROLSEN RL-19L1003U (Panel M185BGE-L10 Rev.C1), ROLSEN RL-22L1003U (Panel V216BG1-LE1 REV C1), ROLSEN RL-23L1003UF (Panel M230HGE-L20 Rev.C1), ROLSEN RL-23L1005UF (Panel M230HGE-L20 RevC1).
External view of the power supply
Main features of the DNS E19A00 device:
The matrix (LED-panel) CX185LEDM (V185B1-PE) is installed.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BIT3251 PWM controller. As the power elements of the LED driver, keys of the AO4616 (8pin), AOD478 (3pin) types are used.
The formation of the necessary supply voltages for all nodes of the DNS E19A00 TV is carried out by the MP113_REV1.3 power module, or its analogs using PWM SOT23-6 (LPP 35) microcircuits.
MainBoard - the main board (motherboard) is a T.VST29.A2B_12313 module, using GG2U (5), DX1517P and others.
DNS E19A00 TV with LCD CX185LEDM, diagonal 19 "(48 cm) in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum to minimum brightness is 1000: 1. the model uses a panel with backlighting LEDs at the end - Edge LED.
The CX185LEDM (V185B1-PE) sensor and the MainBoard T.VST29.A2B_12313 software provide high quality HD viewing at 1366x768 pixels in 720p (HD Ready). 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. Supported media file formats: MP3, WMA, MPEG4, JPEG.
Speaker power of 10 W (2x5 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, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV operating in mains mode is 36 W. Power supply MP113_REV1.3.
Dimensions: With stand 462x332x150 mm, Without stand 462x290x45 mm.
TV weight: 3 kg.
Attention! The panel CX185LEDM (V185B1-PE) of the DNS E19A00 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.