Technical description and composition of the ERISSON 22LEJ02 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 22LEJ02
Chassis / Version: LA.M181.B4 1160
Panel: LTM215HT03
Power Supply (PSU): Adapter 12V 3A
MainBoard: LA.M181.B4 1160
IC MainBoard: CPU: MST6E181VS-LF-Z1, SPI Flash: MX25L3206E, W9425G6JH-5, TD1583, FR9886
Tuner: TNF903SHR-BF-1
Specifications 22LEJ02
ERISSON 22LEJ02
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 22LEJ02 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
Most often, with such manifestations, the main adapter power module is found to be faulty.
This TV model is equipped with an external power adapter type Adapter 12V 3A, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is some reason to open it and eliminate simple typical defects typical of IIPS. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the LA.M181.B4 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - CPU: MST6E181VS-LF-Z1, SPI Flash: MX25L3206E, W9425G6JH-5, TD1583, FR9886. Defective components should be replaced.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TNF903SHR-BF-1 tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
FIRMWARE FOR SPI FLASH -----------> ERISSON 22LEJ02 , Main: LA.M181.B4 1160, Panel: 720p HD, 1366x768
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 22LEJ02 device:
Installed matrix (LED-panel) LTM215HT03.
To power all the internal components of the ERISSON 22LEJ02 TV, an external adapter type 12V 3A is used.
MainBoard - the main board (motherboard) is a LA.M181.B4 module, using CPU chips: MST6E181VS-LF-Z1, SPI Flash: MX25L3206E, W9425G6JH-5, TD1583, FR9886 and others.
The TNF903SHR-BF-1 tuner provides television reception and channel tuning.
Information from an alternative source:
ERISSON 22LEJ02
Panel Type (Matrix): LTM215HT03,
Motherboard: LA.M181.B4 1160, MST6E181VS-LF-Z1, MX25L3206E, W9425G6JH-5, TD1583, FR9886, SGM331A, YD1517P, Tuner: ET-9L1EE01WR
T-con: LTM215HT03S2LV0.3 HF, LMUD012MOM-Q1, 24C64WP, 17814HS x2, Led-driver: LDA02-63V240E, BIT3251, 12N10, POWER: DC 12V; 3A
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM215HT03
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 (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 16S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 22LEJ02 TV with an LTM215HT03 LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The LED panel of this TV has LED backlighting - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in standard graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 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 524x340x44 mm.
Attention! The LTM215HT03 panel of the ERISSON 22LEJ02 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.