Technical description and composition of the DNS E19A11 TV, panel type and modules used. The composition of the modules.DNS LED
Model: E19A11
Chassis / Version: CV59L-C
Panel: CX185LEDM (M185BGE-P02)
LED driver (backlight): with integrated PSU
PWM LED driver: BIT3251
MOSFET LED driver: AO4616, AOD478
Power Supply (PSU): MP113_REV1.3
PWM Power: PWM SOT23-6
MainBoard: CV59L-C
IC MainBoard: CPU: TSUMV59XE, SPI FLASH: W25Q32, Audio: YD1517
Tuner: NoName
E19A11 Specifications
DNS E19A11
General recommendations for TV LCD LED repair
Possible malfunctions
- DNS E19A11 will not turn on, LEDs on the front panel are off or flashing. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the MP113_REV1.3 module, is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
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 circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and a short circuit between the terminals, are checked by replacing them 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.
As a rule, in such cases there is no display 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.
To test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and needs to be replaced.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the CV59L-C 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). When repairing an MB board, you need to check its components CPU: TSUMV59XE, SPI FLASH: W25Q32, Audio: YD1517. Defective elements should be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
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 NoName 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 of the E19A11 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 E19A11, Main: CV59L-C, Panel: CX185LEDM
The appearance of the MainBoard CV59L-C is shown in the figure below:The MainBoard CV59L-C uses a multipurpose microprocessor of the TSUMV59 type with a built-in scaler and an external SPI Flash ROM of the 25Q32 type (4Mb).
It is advisable to start repairing the motherboard with checking the voltage converters + 5V and the power supply of the processor core + 1.2V, as well as the linear voltage stabilizers + 3.3V and the power supply of the built-in RAM DDRAM of the processor 1.8V.
If the display backlight is working properly and there is no image, it is necessary to check the panel power supply (depending on the type, + 5V or + 12V), which can be measured directly at the LVDS connector. If, with all supply voltages present, the TV does not go into operation, does not respond to the Remote Control and control buttons, you should update the SPI Flash software.
CV59L-C can be used in TVs:
DNS E16A20 (Panel TL156WH4 (TL)(N2)), DNS E19A11 (Panel CX185LEDM (M185BGE-P02)), ELENBERG LE236N59W (Panel HM236WU-100), TELEFUNKEN TF-LED19S2 (Panel A185CD1B1E-2-A).
External view of the power supply
Main features of the DNS E19A11 device:
Installed matrix (LED-panel) CX185LEDM (M185BGE-P02).
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BIT3251 PWM controller. The keys of the AO4616, AOD478 types are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the DNS E19A11 TV is carried out by the MP113_REV1.3 power module, or its analogs using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a CV59L-C module, using CPU chips: TSUMV59XE, SPI FLASH: W25Q32, Audio: YD1517 and others.
Tuner NoName provides reception of television programs and tuning to channels.
The CX185LEDM sensor (M185BGE-P02) and the MainBoard CV59L-C software provide high quality HD viewing at a resolution of 1366x768 pixels in 720p (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p standards. Supported media file formats: MP3, MPEG4, DivX, MKV, 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 TV uses the MP113_REV1.3 power supply.
Dimensions: With stand 447x318x160 mm, Without stand 447x279x46 mm.
TV weight: 2.7 kg.
Attention! Panel CX185LEDM (M185BGE-P02) LED TV DNS E19A11 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.