Technical description and composition of the ERISSON 19LEJ02 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 19LEJ02
Chassis / Version: LA.M181.B4 1160
Panel: LM185WH2 (TL) (A1) // LQ185T1LGN3
Power Supply (PSU): Adapter 12V
MainBoard: LA.M181.B4 1160 // CVMV26L-B-20
IC MainBoard: MST6E181VS-LF-Z1, W9425G6JH-5, 25Q32BVSIG, YD1517P, DC / DC - FR9886, TD1583
Tuner: TNF903SHR-BF-1
Specifications 19LEJ02
ERISSON 19LEJ02
General repair guidelines for TV LCD LED
It is advisable to start the repair of the ERISSON 19LEJ02 TV with a careful external examination of both internal and external elements. Often, for 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 power supply module malfunctions, the external manifestations may be different, for example, ERISSON 19LEJ02 does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
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.
Sometimes the ERISSON 19LEJ02 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 LM185WH2 (TL) (A1) panel backlight LED converter, or an interruption 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).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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.
If the LA.M181.B4 1160 motherboard is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
If it is not possible to replace the MB board (SSB), you need to check the health of its elements - MST6E181VS-LF-Z1, W9425G6JH-5, 25Q32BVSIG, YD1517P, DC / DC - FR9886, TD1583. Defective components should be replaced.
If you suspect a malfunction of the TNF903SHR-BF-1 tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is on the corresponding output of the tuner, as well as other voltage supplying it.
Attention to users! Self-repair of the ERISSON 19LEJ02 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
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 19LEJ02 device:
Installed matrix (LED panel) LM185WH2 (TL) (A1) or LQ185T1LGN3.
To power all internal components of the ERISSON 19LEJ02 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a LA.M181.B4 module, using microcircuits MST6E181VS-LF-Z1, W9425G6JH-5, 25Q32BVSIG, YD1517P, DC / DC - FR9886, TD1583 and others.
The TNF903SHR-BF-1 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LM185WH2-TLA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 1.1 / 3.9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 3 strings WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 19LEJ02 TV with an LM185WH2 LCD display, 19 "(48 cm) diagonal size 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 the standards 480i, 480p, 576i, 576p, 720p, 1080i. Stereo sound is realized by two built-in speakers. Olza NICAM STEREO audio processing system.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), S-Video, VGA. 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.
The power consumed by the TV in the operating mode from the network is 30 watts.
Overall dimensions: With a support of 605x465x210 mm, Without a support of 605x405x93 mm.
Attention! The LM185WH2 (TL) (A1) panel of an ERISSON 19LEJ02 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.