Technical description and composition of the TV AIWA 42LE71213, type of panel and applicable modules. The composition of the modules.AIWA LED
Model: 42LE71213
Chassis / Version: V1N10
Panel: LC420EUJ- (SF) (K2)
LED backlight: SEL420FY (LDF-200) -X2 - B / A
LED driver (backlight): integrated into PSU
Power Supply (PSU): 5800-P47ELL-W010
PWM Power: TEA1755T
MOSFET Power: 18N50, 2SK3673
MainBoard: 5800-A5M91T-0P10
IC MainBoard: CPU: MSD6369IV, SPI Flash: 25Q16, Nand: TNGBM4G4D1HBAIR
Specifications 42LE71213
AIWA 42LE71213
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 42LE71213 TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or to the remote control.
In such cases, the main power source - the AC / DC voltage converter, which is combined with the MainBoard 5800-A5M91T-0P10 board, may turn out to be faulty. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (18N50, 2SK3673) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. TEA1755T PWM controllers, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). 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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 5800-A5M91T-0P10 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). 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: MSD6369IV, SPI Flash: 25Q16, Nand: TNGBM4G4D1HBAIR 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.
Once again, remind users! Attempts to self-repair the TV AIWA 42LE71213 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> AIWA 42LE71213 V1N10, Main: 5800-A5M91T-0P10, Panel: LC420EUJ-(SF)(K2)
The appearance of the MainBoard 5800-A5M91T-0P10 is shown in the figure below:5800-A5M91T-0P10
5800-A5M91T-0P10 can be used in TVs:
AIWA 47LE71213 (Panel LC470EUJ (SF)(K2)), SUPRA STV-LC47S660FL00 (Panel LC470EUJ-SFK2 1920x1080).
The appearance of the power supply
Key Features of AIWA 42LE71213:
Installed matrix (LED-panel) LC420EUJ- (SF) (K2).
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the TV AIWA 42LE71213 are generated by the power supply module 5800-P47ELL-W010, or its analogs using TEA1755T microcircuits and power switches of the 18N50, 2SK3673 type.
MainBoard - the main board (motherboard) is a 5800-A5M91T-0P10 module, using CPU chips: MSD6369IV, SPI Flash: 25Q16, Nand: TNGBM4G4D1HBAIR and others.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUJ-SFK2
Type: a-Si TFT-LCD, CELL
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 927.94x521.96 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.35% (with Polarizer)
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 6 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Trademark: AIWA, Model: 42LE71213.
Briefly from the TV: LCD, LED backlight, 42 ", 1920x1080, 1080p Full HD, 3D, sound: 16W, HDMI: 3, Wi-Fi, Smart TV.
The composition uses MainBoard 5800-A5M91T-0P10 and LCD Panel LC420EUJ-SFK2. Backlight: Edge LED. Version V1N10
AIWA 42LE71213 TV with an LCD display LC420EUJ-SFK2, diagonal size 42 "(107 cm) in 16: 9 format. The required brightness of the screen is 360 cd / m² LED backlight LED. Dynamic contrast ratio 120,000: 1 is achieved by special control of the LEDs. V manufacturing technology of the display of this model is implemented LED backlight. is, 2D to 3D conversion
The LC420EUJ-SFK2 panel and the software of the 5800-A5M91T-0P10 motherboard provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
42LE71213 is equipped with SMART software and the ability to work on the Internet. Connecting to a network can be done via Wi-Fi. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound system 16 W (2x8 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), AV, audio x2, component, VGA, HDMI x3, MHL, USB x4, Wi-Fi. 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. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV working in the network mode is 120 watts.
Overall dimensions: without stand 965x577x53 mm.
TV mass: without stand: 14.8 kg.
Attention! Panel LC420EUJ-SFK2 LED-TV AIWA 42LE71213 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.