TELEFUNKEN LEDModel: TF-LED32S27T2
Chassis / Version: T-TU6M3
Panel: LC320DXJ-SFA2 RDL320HY (LD0-803) REV.00
LED backlight: 5800-W32001-3P02
LED driver (backlight): integrated in MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: AOD4286 (D4286)
Power supply (PSU): integrated into the MainBoard
PWM power: LNK6777K
Main board: 5800-A6M31G-0P10
MainBoard IC: 25Q64, TPA3113D2, MP8126
Tuner: CP DVB-T2
TELEFUNKEN TF-LED32S27T2
General Repair Instructions for LCD LCD TVs
Possible malfunctions
- TELEFUNKEN TF-LED32S27T2 does not light up, the indicators on the front panel do not light up and do not flash. The TV does not respond to the control buttons and the remote control.
Malfunction in such cases should be looked for in the power source components - the line voltage converter (AC / DC), located on the MainBoard 5800-A6M35G-0P10 main board. It is necessary to measure its output voltages and, if they are absent, to check the probability of a short circuit in the power switches and rectifier diodes of the converter.
In the event of diode failures in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages and during a short-circuit in the power elements of the primary circuit, the network fuse and / or the current sensor at the source of the key usually breaks.
Mos-Fet switches, used in switch mode power supplies, sometimes fail due to a malfunction of any other element that could put it out of service in key mode or create an excess of the maximum admissible parameters of the switch. These can be elements supplying the PWM controller, frequency adjustment or damping circuits, or negative feedback elements in the stabilization circuit. The PWM LNK6777K controllers, in the absence of visible damage or a free short circuit between the terminals, are checked by replacing them with new ones or by operating clearly.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
In this case, the most likely malfunction of the LED panel backlight elements. This can be due to both the power supply of the LEDs, their operating state (failure or breakage) and the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without dismantling 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 power source is suitable for such purposes. You can open the panel and check each indicator separately. Typically, Chinese multimeters will light a single 3-volt LED if you connect the probes in the direct direction (red probe at the anode, black at the cathode). In the case of two 6-volt LEDs, the PN junction of its emergency zener diode can be used as a health indicator. In the event of a malfunction of the LED, its Zener diode will either be cut or broken in short circuit.
- The indicator blinks or stays on continuously, the TV does not turn on, does not respond to the remote control.
Repairing or diagnosing the 5800-A6M35G-0P10 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you must update or replace the software (software). In case of complex MB repairs (SSB) and in the presence of the necessary skills and equipment, it may sometimes be necessary to replace its 25Q64, TPA3113D2, MP8126 chips and other possibly defective components. Malfunctions associated with the application of BGA welding technologies are generally easily diagnosed by the heating method.
If the TV operates normally from external devices, but does not tune in the TV channels, the CP DVB-T2 tuner may not work properly. In this case, you must first make sure that there are supply voltages at the corresponding terminals. You should also ensure that the tuner and the processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner can be a software failure.
Owners and users of the TELEFUNKEN TF-LED32S27T2 TV should remember that self-repair, without special knowledge, skills and qualifications, can have serious negative consequences which can lead to complete non-repairability of the device!
DOWNLOAD FIRMWARE SPI FLASH -------------> TELEFUNKEN TF-LED32S27T2, Main: 5800-A6M31G-0P10, Panel: LC320DXJ-SFA2
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TELEFUNKEN TF-LED32S27T2 Main: 5800-A6M31G-0P10
To reduce the backlight current, the total resistance of the resistors in relation to the ISET pin housing of the MP3398A should be increased proportionally. ISET (current setting) - pin 8 of the SOIC-20 box or pin 6 of the SOIC-16 box.The appearance of the MainBoard 5800-A6M31G-0P10 is shown in the figure below:
5800-A6M31G-0P10
5800-A6M31G-0P10 can be used in TVs:
AIWA 32LE4020 (Panel LC320DXJ-SHA2 GDL320HY (LD0-008) Rev.00), AIWA 32LE7020 (Panel LC320DXJ (SH)(A2)), ERISSON 32LES71T2 (Panel LC320DXJ-SFA2), ERISSON 32LES70T2 (Panel LC320DXJ (SF)(A2)), SUPRA STV-LC32T650WL (Panel LC320DXJ-SFA2 RDL320HY(LD0-803)45).
Main features of the TELEFUNKEN TF-LED32S27T2 device:
Installed matrix (LED panel) LC320DXJ-SFA2 RDL320HY (LD0-803) REV.00.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A6M31G-0P10, controlled by the MP3398A PWM controller. As power elements of the LED driver, keys of the type AOD4286 (D4286) are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using LNK6777K microcircuits.
MainBoard - the main board (motherboard) is a 5800-A6M31G-0P10 module, using 25Q64, TPA3113D2, MP8126 chips and others.
Tuner CP DVB-T2 provides the reception of television programs and tuning to channels.
TV TELEFUNKEN TF-LED32S27T2 with LCD display LC320DXJ-SFA2, diagonal size 31.5 "(80 cm) 16: 9. Brightness of the screen of 230 cd / m2 is provided by LED backlight. Contrast, as the ratio of maximum brightness to minimum, is 1200 : 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 takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, WMA, MPEG4, Xvid, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
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 television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 733x465x150 mm.
TV weight: 5 kg.
Attention! Panel LC320DXJ-SFA2 RDL320HY LED TV TELEFUNKEN TF-LED32S27T2 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.