Technical description and composition of the ERISSON 19LES61 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 19LES61
Chassis / Version: 5800-A8M350-0020
Panel: V185B1-LE1
LED backlight: EDGE LED
T-CON: M185B3-LA1-X + C
PWM LED driver: MP3389EF
Power Supply (PSU): Adapter 12V
MainBoard: 5800-A8M350-0020
IC MainBoard: MST740KE-LE, 25Q80BS, 24C32WP, LM4558S, LM78D08A, TDA7266SA, MO430, HEF4052BT, AS1117L-33
Tuner: 5221-389485-0V00
Specifications 19LES61
ERISSON 19LES61
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 19LES61 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most often, with such manifestations, the main adapter power module is found to be faulty.
This model of TV is equipped with an external power adapter adapter type 12V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of short circuit.
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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 5800-A8M350-0020 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing elements MST740KE-LE, 25Q80BS, 24C32WP, LM4558S, LM78D08A, TDA7266SA, MO430, HEF4052BT, AS1117L-33 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
In cases where there is no 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 tuner 5221-389485-0V00. 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, remind users! Attempts to self-repair a TV ERISSON 19LES61 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> ERISSON 19LES61, Main: 5800-A8M350-0020, Panel: V185B1-LE1
To reduce the backlight current in LED drivers with a PWM controller MP3389EF (MP3389), or its analogue OB3362VP (28 pin), it is necessary to proportionally increase the total resistance of the resistors from pin 9 (ISET) to the chassis. The maximum current in each of the 12 channels (in milliamps) for the resistance Rset (in kilo-ohms) is determined from the ratio 1000 * 1.22V / Rset. With a parallel connection of channels, currents are summed.
Repair MainBoard
The appearance of the MainBoard 5800-A8M350-0020 is shown in the figure below:
5800-A8M350-0020
Main features of the ERISSON 19LES61 device:
Installed matrix (LED-panel) V185B1-LE1.
The matrix control uses the Timing Controller (T-CON) M185B3-LA1-X + C.
A converter controlled by the MP3389EF PWM controller is used to power the backlight LEDs.
To power all internal components of the ERISSON 19LES61 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a module 5800-A8M350-0020, using microchips MST740KE-LE, 25Q80BS, 24C32WP, LM4558S, LM78D08A, TDA7266SA, MO430, HEF4052BT, AS1117L-33 and others.
The tuner 5221-389485-0V00 provides the reception of television programs and tuning to channels.
Information from an alternative source:
ERISSON 19LES61 Clone: SUPRA STV-LC1985 Version V3K12
Panel Type (Matrix): V185B1-LE1,
Motherboard: 5800-A8M350-0020, MST740KE-LE, 25Q80BS, 24C32WP, LM4558S, LM78D08A, TDA7266SA, MO430, HEF4052BT, AS1117L-33, Tuner: 5221-389485-DVOO
T-con: M185B3-LA1-X + C not removable, LED-DRV :, MP3389EF, Power: External DC; 12V; 4A,
Additional technical information about the panel:
Brand: CMO
Model: V185B1-LE1
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 (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S8P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
ERISSON 19LES61 TV with a V185B1-LE1 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 with a resolution of 1366x768 pixels in the standard of 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. Stereo sound is realized by two built-in speakers and .NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, component, SCART, RGB, VGA, HDMI. 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.
Overall dimensions: With stand 769x536x196 mm, Without stand 392x260x40 mm.
Attention! The V185B1-LE1 panel of an ERISSON 19LES61 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.