Technical description and composition of the ERISSON 22LEE31T2 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 22LEE31T2
Chassis / Version: CV512L-B
Panel: CX215LEDM
LED backlight: EDGE LED
Power Supply (PSU): Adapter 12V
MainBoard: CV512L-B
IC MainBoard: Spi Flash: 25Q64FVSIG
Tuner: DVB-T2
Control: Service mode - Source 2 5 8 0
Specifications 22LEE31T2
ERISSON 22LEE31T2
General repair guidelines for TV LCD LED
Repair of the ERISSON 22LEE31T2 TV should begin with a careful external examination of all its components and modules. Based on visible external changes in the state of the components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before making the necessary measurements. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In cases where the ERISSON 22LEE31T2 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 and no signs of operability at all, the power module is most likely faulty or there is no processor power on motherboard (a typical defect of some ERISSON TV models). In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the ERISSON 22LEE31T2 TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the CX215LEDM panel is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the lines and connectors.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its Spi Flash chips: 25Q64FVSIG and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Attention to users! Self-repair of the ERISSON 22LEE31T2 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Main CV512L-B
FIRMWARE FOR SPI FLASH -----------> ERISSON 22LEE31T2, Main: CV512L-B, Panel: CX215LEDM
The appearance of the MainBoard CV512L-B is shown in the figure below:CV512L-B
CV512L-B can be used in TVs:
BBK 28LEM-1021/T2C (Panel SV275SHD HX010403 X41), BBK 22LEM-1026/FT2C (Panel M215HGE-P02), DEXP H24B7100E (Panel CX236LEDM (V236BJ1-P01)), DEXP F22B7000E/B (Panel CX215LEDM), ERISSON 22LEE31T2 (Panel CX215LEDM), RUBIN RB-22SE2FT2S (Panel 1080p Full HD 1920x1080), SUPRA STV-LC24T880WL (Panel HV236WHB-N00), SUPRA STV-LC22T880FL (Panel LC215DTBA).
Main features of the ERISSON 22LEE31T2 device:
Installed matrix (LED-panel) CX215LEDM.
To power all internal nodes of the ERISSON 22LEE31T2 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a CV512L-B module, using Spi Flash chips: 25Q64FVSIG and others.
The DVB-T2 tuner provides television reception and channel tuning.
Technical description
ERISSON 22LEE31T2 TV with a CX215LEDM LCD display, diagonal size 21.5 "(55 cm) in 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlight LED. Contrast ratio as the ratio of maximum brightness to minimum is 3000: 1. The LED panel of this TV is equipped with an end LED backlight - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems . Max PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p Supported multimedia file formats:. MP3, MPEG4, Xvid, DivX, MKV, JPEG.
The power of the sound system 10 W (2x5 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, VGA, HDMI, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With a support 506x338x176 mm, Without a support 506x301x44 mm.
Attention! The CX215LEDM panel of an ERISSON 22LEE31T2 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable