Technical description and composition of the ERISSON 22LEK14 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 22LEK14
Chassis / Version: MST6M181-T7S 471-01A4-61702G
Panel: M215H3-LA1 REV.C1
MainBoard: MST6M181-T7S 471-01A4-61702G
IC MainBoard: CPU: MST6E181VS-LF-Z1; SPI Flash: 25Q32;
Tuner: F50CT-2DD-E (X)
Specifications 22LEK14
ERISSON 22LEK14
General repair guidelines for TV LCD LED
Repair of the ERISSON 22LEK14 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In the absence of any signs of operability, when the ERISSON 22LEK14 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
Sometimes the ERISSON 22LEK14 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the converter for the backlight LEDs of the M215H3-LA1 REV.C1 panel, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
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.
On the MST6M181-T7S 471-01A4-61702G motherboard, in case of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - CPU: MST6E181VS-LF-Z1; SPI Flash: 25Q32; . In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If you suspect a malfunction of the F50CT-2DD-E (X) tuner, first of all, make sure that there is a supply voltage on the corresponding output of the tuner.
It should be remembered! Attempts to repair the ERISSON 22LEK14 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> ERISSON 22LEK14 , Main: MST6M181-T7S 471-01A4-61702G, Panel: M215H3-LA1 REV.C1
The appearance of the MainBoard MST6M181-T7S is shown in the figure below:The MST6M181-T7S motherboard uses the MST6M181VS-LF-Z1 processor combined with a scaler, DDR Winbond type W9425G6JH external random access memory (RAM), and type 25Q32 SPI flash ROM.
It is advisable to start the MainBoard repair by checking the supply voltages of the linear stabilizers and voltage converters necessary to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. The power of the 5V or 12V LCD panel, depending on the type of panel used, can be measured directly on the LVDS connector. In cases where the TV does not exit Stand-by mode, does not respond to the remote control and control buttons in the presence of all supply voltages, the SPI Flash software should be updated.
MST6M181-T7S can be used in TVs:
ERISSON 22LEK14 (Panel M215H3-LA1 REV.C1), ROLSEN RL-17L1002U (Panel LTN173KT01-A01), ROLSEN RL-17L1002U (Panel LTN173KT02 ), ROLSEN RL-19L1002U (Panel 19 "), ROLSEN RL-22L1002UF (Panel LTM215HT04 B2 (5v)), ROLSEN RL-23L1002UF (Panel M230WA01-ED G2 EE01 LED), RUBIN RB-19SL1U (Panel 19 "), RUBIN RB-22SL1UF (Panel LTM215HT04 led), RUBIN RB-23SL1UF (Panel 23 ").
Main features of the ERISSON 22LEK14 device:
Installed matrix (LED panel) M215H3-LA1 REV.C1.
The required supply voltage for all nodes of the TV ERISSON 22LEK14 provides a switching power supply.
MainBoard - the main board (motherboard) is an MST6M181-T7S module, using CPU chips: MST6E181VS-LF-Z1; SPI Flash: 25Q32; and others.
The F50CT-2DD-E (X) tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: M215H3-LA1
Type: a-Si TFT-LCD, Panel
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)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S6P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 22LEK14 TV with an M215H3-LA1 LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. The LED-panel of this TV has an end LED backlight - Edge LED.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic layout according to the standard 1080p (Full HD). .-Frequency or the video signal can be processed in analog systems PAL, SECAM Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:. MP3, MPEG4, DivX, JPEG.
The power of the acoustic system of sound 6 W (2x3 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x4, S-Video, component, VGA, HDMI x3, 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, 1280x1024, 1360x768, 1920x1080.
Overall dimensions: With stand 533x390x155 mm, Without stand 533x350x37 mm.
Attention! The M215H3-LA1 REV.C1 panel of the ERISSON 22LEK14 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.