Technical description and composition of the ASANO 32LH1030S TV, panel type and modules used. The composition of the modules.ASANO LED
Model: 32LH1030S
Chassis / Version: TP.MS3663S.PB818
Panel: LSC320AN10
LED driver (backlight): integrated into MainBoard
PWM LED driver: SO-8
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: TP.MS3663S.PB818
IC MainBoard: CPU: MSD3663LSA-SW, SPI Flash: W25Q64B
Tuner: XF-3SDT-H & SAT
Specifications 32LH1030S
ASANO 32LH1030S
General recommendations for TV LCD LED repair
Possible manifestations of defects
- TV ASANO 32LH1030S does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up or flash.
A malfunction in such cases, first of all, should be looked for in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the main board MainBoard TP.MS3663S.PB818. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, the serviceability of the power switches (TO-252) and rectifier diodes should be checked for a possible breakdown (short circuit).
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and less often the current sensor in the source of the key.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM regulator, in frequency-setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) PWM SOT23-6 are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, there is sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.
A malfunction is usually in these cases most likely in the backlight units of the display matrix. Often the cause of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.
To test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed; it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and requires replacement.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the TP.MS3663S.PB818 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Repair of the board and replacement of CPU: MSD3663LSA-SW, SPI Flash: W25Q64B microcircuits are made with the necessary equipment and the corresponding element base. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
The XF-3SDT-H & SAT tuner malfunction is established after checking the software and all supply voltages at its terminals. The I2C bus data exchange between the tuner and the processor can be monitored with an oscilloscope.
Owners and users of the ASANO 32LH1030S TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of MainBoard TP.MS3663S.PB818 is shown in the figure below:TP.MS3663S.PB818
The main features of the ASANO 32LH1030S device:
Installed matrix (LED panel) LSC320AN10.
To power the backlight LEDs, a converter combined with the main board TP.MS3663S.PB818 is used, controlled by the SO-8 PWM controller. TO-252 switches are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using PWM SOT23-6 microcircuits and TO-252 power switches.
MainBoard - the main board (motherboard) is a TP.MS3663S.PB818 module, using CPU chips: MSD3663LSA-SW, SPI Flash: W25Q64B and others.
Tuner XF-3SDT-H & SAT provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC320AN10
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare
Glass Depth: 0.50 + 0.50 mm
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 20 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
ASANO 32LH1030S TV with LCD LSC320AN10, diagonal size 31.5 "(80 cm) 16: 9. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 5000: 1. In the technology of manufacturing the screen of this TV model, LED backlighting is implemented.
There is a convenient function for recording TV programs on a USB-drive with subsequent viewing at another time (TimeShift).
You can view images in high quality HD at a resolution of 1366x768 pixels in 720p (HD Ready). Supported media file formats: MP3, MKV, JPEG.
Speaker power 14 W (2x7 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI 1.4 x3, USB x2. A headphone output is provided.
The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 730x465x177 mm, without stand 730x433x87 mm.
TV weight: with stand: 4.1 kg, without stand: 4 kg.
Attention! The panel LSC320AN10 of the ASANO 32LH1030S LED TV is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV non-repairable.