Technical description and composition of the ERISSON 40LEP92 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 40LEP92
Chassis / Version: TP.SIS231.PT851
Panel: LSC400HN01 G01
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.SIS231.PT851
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
Specifications 40LEP92
ERISSON 40LEP92
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 40LEP92 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard TP.SIS231.PT851 board. It is necessary to measure its output voltages and, if they are absent, to check for short-circuit probabilities in the converters, power switches and rectifier diodes.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often 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, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
In such cases, the most likely malfunction of the LED backlight elements. 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 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the TP.SIS231.PT851 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). When repairing an MB board, you need to check its CPU components: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
We recommend the owners of the 40LEP92 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 40LEP92, Main: TP.SIS231.PT851, Panel: LSC400HN01-G01
The appearance of MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT851 can be used in TVs:
ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1).
Main features of the ERISSON 40LEP92 device:
Installed matrix (LED panel) LSC400HN01 G01.
To power the backlight LEDs, a converter is used, combined with the TP.SIS231.PT851 main board, controlled by the OB3350CP PWM controller. As power elements of the LED driver, keys of the AOD4454 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is a TP.SIS231.PT851 module, using CPU chips: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC400HN01
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare, Hard coating (2H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 5.4% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Trademark: ERISSON, Model: 40LEP92.
Shortly from the TV: LCD, 1080p Full HD, 40 "(102 cm) diagonal, HDMI: 3, USB, DVB-T2 support, backlight type: Edge LED.
The composition uses MainBoard TP.SIS231.PT851 and an LCD panel (matrix) LSC400HN01 G01. The power supply is combined with the MainBoard.
Technical description
TV ERISSON 40LEP92 with LCD LSC400HN01, diagonal size 40 "(102 cm) 16: 9 format. The required brightness of the screen 280 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. The LED panel of this TV uses end LED backlighting - Edge LED.The TV’s design and technical capabilities include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD). Audio 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. Supported media file formats: MP3, WMA, MPEG4, DivX, JPEG .
The power of the sound system 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, HDMI x3, USB. 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.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-T2 standards.
Overall dimensions: With stand 439x300x138 mm, Without stand 439x263x44 mm.
Attention! The LSC400HN01 G01 panel of an ERISSON 40LEP92 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.
