Technical description and composition of the ERISSON 42LES68 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 42LES68
Chassis / Version: 5800-A6M88G-0P10
Panel: LC420DUJ-SGE1
LED backlight: 555-R4205000-LA 2D01006 & 2D01005 Rev. C
T-CON: 6870C-0469A
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9967GN
Power Supply (PSU): 168P-L3L021-W0
PWM Power: TEA1733
MOSFET Power: K3673
MainBoard: 5800-A6M88G-0P10 Ver00.00
IC MainBoard: NAND FLASH: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2
Tuner: CP + SAT
Specifications 42LES68
ERISSON 42LES68
General repair guidelines for TV LCD LED
Possible manifestations of defects
- ERISSON 42LES68 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Most often, with such manifestations, the main power module 168P-L3L021-W0 turns out to be faulty. It is necessary to measure its output voltages and, if they are absent, check the power switches (K3673) and rectifier diodes for the short circuit probability in the converters.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) TEA1733, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
As a rule, in this case, the LED backlight turns out to be faulty. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED-driver).
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the 5800-A6M88G-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). Board repair and replacement of NAND FLASH chips: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before replacing the CP + SAT tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the ERISSON 42LES68 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Repair MainBoard
The appearance of the MainBoard 5800-A6M88G-0P10 is shown in the figure below:
5800-A6M88G-0P10
The appearance of the power supply
Main features of the ERISSON 42LES68 device:
Installed matrix (LED-panel) LC420DUJ-SGE1.
The matrix control uses the Timing Controller (T-CON) 6870C-0469A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9967GN PWM controller.
The necessary supply voltages for all nodes of the TV ERISSON 42LES68 are generated by the power supply module 168P-L3L021-W0, or its analogs using TEA1733 microcircuits and K3673 type power switches.
MainBoard - the main board (motherboard) is a 5800-A6M88G-0P10 module, using NAND FLASH chips: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2 and others.
The CP + SAT tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420DUJ-SGE1
Type: a-Si TFT-LCD, CELL
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, transmissive
Active Area: 927.936x521.964 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
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: ERISSON, Model: 42LES68.
Shortly from the TV: LCD, 1080p Full HD, diagonal 42 "(107 cm), HDMI: 3, USB: 2, there is support for DVB-T2, backlight type: Edge LED.
The composition includes MainBoard 5800-A6M88G-0P10 Ver00.00 and LCD-panel LC420DUJ-SGE1.
Power Supply Unit (PSU) 168P-L3L021-W0 Power Supply.
Technical description
TV ERISSON 42LES68 with LCD display LC420DUJ-SGE1, diagonal size 42 "(107 cm) in 16: 9 format. The required brightness of the screen is 230 cd / m² LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 5000: 1. The LED-panel of this TV is equipped with end LED backlighting - Edge LED.The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic layout according to the standard 1080p (Full HD). frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV , JPEG.
The power of the sound system 16 W (2x8 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, VGA, HDMI x3, USB x2. 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.
Overall dimensions: 956x602x220 mm.
The mass of the TV: 13.2 kg.
Attention! The LC420DUJ-SGE1 panel of an ERISSON 42LES68 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.
