Technical description and composition of the DNS S32DC1 TV, panel type and modules used. The composition of the modules.DNS LED
Model: S32DC1
Chassis / Version: TP.SIS231.PT85
Panel: T320XVD01.0
T-CON: T320XVN01.0 CTRL BD 32T21-C06
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: N-FET TO-220
MainBoard: TP.SIS231.PT85
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
Tuner: NoName
Specifications S32DC1
DNS S32DC1
General recommendations for TV LCD LED repair
If the TV does not turn on, no indicator lights are on or blinking, there are no sounds when turning on, not the slightest sign of operability - the most likely problem is the power module. It is advisable to start diagnostics of the power supply module by checking the condition of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in a breakdown state in such situations.
The breakdown of the power switch of a pulse converter is more often provoked by other elements, for example, in the stabilization or control circuits of this switch, as well as by damper elements in its drain and TPI winding.
If the DNS S32DC1 has no image, but there is sound and the TV is controlled from the remote control, a malfunction is likely in the T320XVD01.0 panel backlight circuits. The LEDs or their power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to make sure that the electrolytic capacitors of the rectifier filter supplying the backlight unit are in good working order.
Often, in the absence of backlight, disassembly of the panel is required. It is necessary to check the serviceability of the LED transitions, as well as the reliability of the contact connections in the lines and connectors.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
Repair or diagnostics of the TP.SIS231.PT85 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update the software (software).
If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - SPI Flash 25Q64. Defective components must be replaced.
Attention! Users and owners of S32DC1 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying to repair themselves in order to avoid negative consequences that may lead to the complete non-repairability of the device.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Power supply Chassis TP.SIS231.PT85
The appearance of the MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT85 can be used in TVs:
DNS M39DM8 (Panel V390HJ1-P02 Rev C1), DNS S32DC1 (Panel T320XVD01.0), DNS E32D18 (Panel ST3151A05-5 CX315DLEDM), DNS V32D8100S (Panel LSC320HN04-002), ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1), RUBIN RB-40SE9FT2C (Panel CX400DLEDM), SUPRA STV-LC32T871WL (Panel JHD315GH-E31), SUPRA STV-LC40T871FL (Panel JHD400GF), TELEFUNKEN TF-LED32S26T2 (Panel MT3151A05).
Main features of the DNS S32DC1 device:
Installed matrix (LED-panel) T320XVD01.0.
The matrix is controlled by the Timing Controller (T-CON) T320XVN01.0.
To power the backlight LEDs, a converter combined with the main board TP.SIS231.PT85 is used, controlled by the OB3350CP PWM controller. The keys of the AOD4454 type 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 circuit using PWM SOT23-6 microcircuits and N-FET TO-220 power switches.
MainBoard - the main board (motherboard) is a TP.SIS231.PT85 module using CPU: SIS231 chips, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
Tuner NoName provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T320XVD01.0 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 4.8% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
DNS TV S32DC1 with LCD T320XVD01.0, 32 "(81 cm) diagonal, 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum to minimum brightness is 1200: 1. The LCD panel uses direct pixel backlighting with back-mounted LEDs - Direct LED.
There is support for 3D images using passive polarization technology.
T320XVD01.0 matrix and MainBoard TP.SIS231.PT85 software provide high quality HD image viewing at 1366x768 pixels in 720p (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and formation of a digital signal occurs in the 480i, 480p, 576i, 576p, 720p standards. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The 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, component, SCART, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768. The digital tuner is capable of receiving television channels in DVB-T, DVB-C, DVB-T2 standards.
The TV uses a power supply unit as part of the MainBoard.
Dimensions: With stand 738x490x160 mm, Without stand 1125x660x60 mm.
TV weight: 5.6 kg.
Attention! The T320XVD01.0 panel of the DNS S32DC1 LED TV is an expensive and unreliable element.
Do not allow any impact 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 unrepairable.