Technical description and composition of the ERISSON 22LEJ031 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 22LEJ031
Chassis / Version: LA.M181.B4 1160
Panel: LM215WF4
MainBoard: LA.M181.B4 1160
IC MainBoard: CPU: MST6E181VS-LF-Z1; SPI Flash: 25Q32;
Tuner: TNF903SHR-BF-1
Specifications 22LEJ031
ERISSON 22LEJ031
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the ERISSON 22LEJ031 TV, as well as the external elements of the housing. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the ERISSON 22LEJ031 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the ERISSON 22LEJ031 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the LM215WF4 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
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.
On the LA.M181.B4 1160 motherboard, in case of a malfunction, you should first check the operation of all stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MST6E181VS-LF-Z1; SPI Flash: 25Q32; Requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Attention to the owners! Attempts to repair the TV ERISSON 22LEJ031 on its own are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 22LEJ031 , Main: LA.M181.B4 1160, Panel: LM215WF4
The appearance of MainBoard LA.M181.B4 is shown in the figure below:LA.M181.B4
LA.M181.B4 can be used in TVs:
ERISSON 16LEJ02 (Panel LP156WH4 TL B1), ERISSON 19LEJ02 (Panel LM185WH2 (TL)(A1)), ERISSON 16LEJ03 (Panel LP156WD1 TL A1), ERISSON 24LEJ02 (Panel V236H1-LE2), ERISSON 22LEJ031 (Panel LM215WF4), ERISSON 24LEJ03 (Panel V236H1-LE4 REV C1), ERISSON 19LEJ03 (Panel LM185WH2 (TL)(A1)), ERISSON 22LEJ02 (Panel LTM215HT03).
Main features of the ERISSON 22LEJ031 device:
Installed matrix (LED-panel) LM215WF4.
The required supply voltage for all nodes of the TV ERISSON 22LEJ031 provides a switching power supply.
MainBoard - the main board (motherboard) is a LA.M181.B4 module, using CPU chips: MST6E181VS-LF-Z1; SPI Flash: 25Q32; and others.
The TNF903SHR-BF-1 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: L&T
Model: LM215WF4-TRA1
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, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 22LEJ031 TV with LCD LM215WF4, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen 300 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. The LED panel of this TV uses end LED backlighting - Edge LED.The TV’s design and technical features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG. Stereo audio is implemented in two built-in speakers using NICAM STEREO audio processing system.
The 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. 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: 533x309x155 mm.
TV Weight: 5 kg.
Attention! The LM215WF4 panel of the ERISSON 22LEJ031 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.