Technical description and composition of the ERISSON 24LEJ02 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 24LEJ02
Chassis / Version: LA.M181.B4 1160
Panel: V236H1-LE2
MainBoard: LA.M181.B4 1160
IC MainBoard: CPU: MST6E181VS-LF-Z1; SPI Flash: MX25L3205D;
Tuner: TNF903SHR-BF-1
Specifications 24LEJ02
ERISSON 24LEJ02
General repair guidelines for TV LCD LED
Repair of the ERISSON 24LEJ02 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the 24LEJ02 TV does not turn on, does not make any sounds when turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some ERISSON models. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If ERISSON 24LEJ02 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 V236H1-LE2 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.
To check the health of the LEDs, as well as contact connections in the ruler circuit, the panel must be disassembled.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Repair of the LA.M181.B4 1160 motherboard should begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: MST6E181VS-LF-Z1; SPI Flash: MX25L3205D; and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
In cases where there is no tuning to local television channels, you should make sure that there are supply voltages at the terminals of the TNF903SHR-BF-1 tuner.
Attention! For users and owners of 24LEJ02 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH -----------> ERISSON 24LEJ02, Main: LA.M181.B4 1160, Panel: V236H1-LE2
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 24LEJ02 device:
Installed matrix (LED-panel) V236H1-LE2.
The required supply voltage for all nodes of the TV ERISSON 24LEJ02 provides a switching power supply.
MainBoard - the main board (motherboard) is a LA.M181.B4 module, using CPU chips: MST6E181VS-LF-Z1; SPI Flash: MX25L3205D; and others.
The TNF903SHR-BF-1 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V236H1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 24LEJ02 TV with a V236H1-LE2 LCD display, 24 "(61 cm) diagonal size in 16: 9 format. The LED-panel of this TV is equipped with LED end lighting - 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 graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 5 76p, 720p, 1080i, 1080p.
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), component, SCART, VGA, USB. 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.
Overall dimensions: With stand 769x536x196 mm, Without stand 580x370x44 mm.
Attention! The V236H1-LE2 panel of an ERISSON 24LEJ02 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.