Technical description and composition of the TELEFUNKEN TF-LED32S37T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED32S37T2
Chassis / Version: MS34631-ZC01-01
Panel: ST3151A05-8 // LSC320AN10-H
LED backlight: LED315D10-07 (B) 30331510219
T-CON: ST3151A05-8-XC-3
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: MDD1903
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: MS34631-ZC01-01
IC MainBoard: SPI FLASH: 25Q64, AUDIO: TPA3110D2
Tuner: NoName DVB-T2
Control: IR: TV3024-ZC10-01 (E) 303CMG30245
TF-LED32S37T2 Specifications
TELEFUNKEN TF-LED32S37T2
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TELEFUNKEN TF-LED32S37T2 does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light up or flash.
A malfunction in such cases, first of all, should be sought 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 MainBoard MS34631-ZC01-01 main board. 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 any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key is often cut off.
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 the 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 known to be working properly.
- There is no image, the screen is black, there is sound, sometimes you can see barely noticeable outlines of the image in the ambient light of the screen.
The malfunction in most of such cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it must be borne in mind that it is impossible to check for an open circuit in the LED strip circuit without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. Opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED when the probes are connected to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Before replacing the NoName DVB-T2 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. It is also necessary to make sure that the tuner and processor can exchange data via the I2C busRepair or diagnostics of the MS34631-ZC01-01 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements SPI FLASH: 25Q64, AUDIO: TPA3110D2. BGA chip faults are usually easy to detect by warm-up.
Remember! Attempts to self-repair the TELEFUNKEN TF-LED32S37T2 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> TELEFUNKEN TF-LED32S37T2, Main: MS34631-ZC01-01, Panel: LSC320AN10-H
The appearance of the MainBoard MS34631-ZC01-01 is shown in the figure below:MS34631-ZC01-01
Main features of the TELEFUNKEN TF-LED32S37T2 device:
Installed matrix (LED-panel) ST3151A05-8 or LSC320AN10-H.
Matrix control uses the ST3151A05-8-XC-3 Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with the MS34631-ZC01-01 main board is used, controlled by the OB3350CP PWM controller. The keys of the MDD1903 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 using SOT23-6 PWM microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is an MS34631-ZC01-01 module, using SPI FLASH: 25Q64, AUDIO: TPA3110D2 and others.
Tuner NoName DVB-T2 provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CSOT
Model: ST3151A05-8
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: HVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 7.16% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 62%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
LCD TV TELEFUNKEN TF-LED32S37T2, diagonal size 31.5 "(80 cm) 16: 9. The brightness of the screen is 240 cd / m² provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 5000: 1. The technology of production of the screen of this TV model is realized with LED backlighting.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready) Supported media file formats: MP3, WMA, MPEG4, Xvid, MKV, JPEG.
Speaker power 16 W (2x8 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, audio x2, component, SCART, VGA, HDMI x2, USB. A headphone output is provided.
The digital tuner is capable of receiving television channels in DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 731x473x200 mm.
TV weight: 5 kg.
Attention! The panel of the LED TV TELEFUNKEN TF-LED32S37T2 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.