Technical description and composition of the DNS E22A11 TV, panel type and modules used. The composition of the modules.DNS LED
Model: E22A11
Chassis / Version: T.VST29.A2B
Panel: M215HGE-P02
LED backlight: 01.JL.CX2208C320A1
LED driver (backlight): integrated into PSU
Power Supply (PSU): MP113TH-39 (MP113)
PWM Power: PWM SOT23-6 (SG6848 or LD7535 or OB2273 ...)
MainBoard: T.VST29.A2B 12313
IC MainBoard: PCU: TSUMV59XE-Z1, Sound: 1517P, SPI Flash: 25Q32RS1G
Control: IR: SDR-V8-IR
E22A11 Specifications
DNS E22A11
General recommendations for TV LCD LED repair
In cases where the DNS E22A11 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds or no signs of operability when turned on, the MP113TH-39 (MP113 ) or there is no standby power supply. 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur without reason and you should look for other faulty circuit elements that could provoke a defect. This can be dry electrolytic capacitors in the primary circuit, and faulty damper elements, as well as broken resistors or punctured semiconductor elements in the stabilization circuits. Possible defects in the PWM PWM SOT23-6 (SG6848 or LD7535 or OB2273 ...) from the manufacturer.
If the DNS E22A11 TV does not have a picture, but there is sound, there is likely a malfunction in the LED backlight circuits of the M215HGE-P02 panel.
In most cases of lack of backlighting, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or more LEDs do not work in one line, therefore, they are punctured and should be replaced.
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 pierced in the K / Z.
Repair of the T.VST29.A2B 12313 motherboard must begin with diagnostics and testing of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In some cases, to repair the MB (SSB) board, it may be necessary to replace chips - PCU: TSUMV59XE-Z1, Sound: 1517P, SPI Flash: 25Q32RS1G with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
Attention! Users and owners of E22A11 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying to repair themselves in order to avoid negative consequences that can lead to the complete non-repairability of the device.
The appearance of the MainBoard T.VST29.A2B is shown in the figure below:
T.VST29.A2B
T.VST29.A2B 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 22LEB15 (Panel M215HW01), ERISSON 19LEB15 (Panel M185XW01), 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 E22A11 device:
Installed matrix (LED-panel) M215HGE-P02.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the DNS E22A11 TV is carried out by the MP113TH-39 power module, or its analogs using PWM SOT23-6 microcircuits (SG6848 or LD7535 or OB2273 ...).
MainBoard - the main board (motherboard) is a T.VST29.A2B module, using PCU chips: TSUMV59XE-Z1, Sound: 1517P, SPI Flash: 25Q32RS1G and others.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: M215HGE-P02
Type: a-Si TFT-LCD, CELL
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Transmissivity: 6.3% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
DNS E22A11 TV with LCD M215HGE-P02, diagonal size 22 "(56 cm) 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. This model uses a panel with backlight LEDs - Edge LED.
The M215HGE-P02 matrix and the MainBoard T.VST29.A2B 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 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, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768, 1920x1080.
The TV uses the MP113TH-39 power supply.
Dimensions: With stand 512x359x170 mm, Without stand 512x314x50 mm.
TV weight: 3.5 kg.
Attention! The panel M215HGE-P02 of the DNS E22A11 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.