Technical description and composition of the TELEFUNKEN TF-LED32S21T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED32S21T2
Chassis / Version: 5800-A6M35G-0P10
Panel: ST3151A05-8 Ver.2.3
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated into PSU
Power Supply (PSU): 168P-L3L027-W2 5800-L3L027-W210
MainBoard: 5800-A6M35G-0P10
IC MainBoard: 25Q64, TPA3113D2, MP8126
Tuner: DVB-T2
TF-LED32S21T2 Specifications
TELEFUNKEN TF-LED32S21T2
General recommendations for TV LCD LED repair
Possible malfunctions
- The TELEFUNKEN TF-LED32S21T2 TV does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.
Usually with similar manifestations, the defect is caused by faulty elements in the main power module 168P-L3L027-W2. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches and rectifier diodes for a possible 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 current sensor in 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 controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and disappear immediately.
Most likely in these cases is a malfunction of the LED backlight. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the LED bars for a break 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 is required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light a single 3V 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 an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced in the K / Z.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the 5800-A6M35G-0P10 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). Complex repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace elements 25Q64, TPA3113D2, MP8126. Malfunctions in BGA chips are usually easy to detect by warm-up.
If the TV operates normally from external devices, but does not tune to TV channels, the DVB-T2 tuner may be faulty. In such cases, first of all, you should make sure that the supply voltage is present at its corresponding terminals. It is also necessary to make sure that the data exchange between the tuner and the processor is possible via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.
Owners and users of the TELEFUNKEN TF-LED32S21T2 TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
Additional MainBoard Repair
The appearance of MainBoard 5800-A6M35G-0P10 is shown in the figure below:
5800-A6M35G-0P10
5800-A6M35G-0P10 can be used in TVs:
TELEFUNKEN TF-LED32S27T2 (Panel LC320DXJ-SFA2 RDL320HY (LD0-803) REV.00), TELEFUNKEN TF-LED32S21T2 (Panel ST3151A05-8 Ver.2.3).
Main features of the TELEFUNKEN TF-LED32S21T2 device:
Installed matrix (LED-panel) ST3151A05-8 Ver.2.3.
Matrix control uses Timing Controller (T-CON) MT3151A05-5-XC-5.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the TELEFUNKEN TF-LED32S21T2 TV is carried out by the 168P-L3L027-W2 power module, or its analogs.
MainBoard - the main board (motherboard) is a 5800-A6M35G-0P10 module, using 25Q64, TPA3113D2, MP8126 and others.
The DVB-T2 tuner provides reception of television programs and tuning to channels.
TV TELEFUNKEN TF-LED32S21T2 with LCD ST3151A05-8, diagonal size 31.5 "(80 cm) 16: 9. The brightness of the screen 260 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum brightness, is 3000 : 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 of graphic resolution 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping is carried out in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, MPEG4, JPEG Stereo sound is realized by two built-in speakers The audio processing system NICAM STEREO is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, HDMI x2, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
Overall dimensions: 736x489x163 mm.
TV weight: 5 kg.
Attention! Panel ST3151A05-8 Ver.2.3 LED TV TELEFUNKEN TF-LED32S21T2 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.