Technical description and composition of the TELEFUNKEN TF-LED32S22T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED32S22T2
Chassis / Version: JUC7.820.00117550
Panel: M320X13-E1-A (G1)
T-CON: 32T24-C0C T320XVN02.9 CTRL BD
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP4012
MOSFET LED driver: MDD14N25
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: JUC7.820.00117550
IC MainBoard: CPU: 9206B, SPI Flash: GD25Q64, MP1471AGJ, TPS54428
Tuner: CH DMI21-C816RH
Control: IR: JUG7.820.1423
TF-LED32S22T2 Specifications
TELEFUNKEN TF-LED32S22T2
General recommendations for TV LCD LED repair
Possible manifestations of defects
- TELEFUNKEN TF-LED32S22T2 does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light or blink.
In such cases, the common power supply is often faulty - the AC / DC converter of the mains voltage, which is combined with the elements of the JUC7.820.00117550 main board. 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 diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can disable it in the key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, there is sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.
Often in such cases there is no backlighting of the LED panel. Most often the reason for this is a break in the LEDs, or poor contact in the connectors of the brackets, less often the LED driver may be faulty.
To test the LED strips, to open all the transitions of the LEDs, you need several tens of volts or more, 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the JUC7.820.00117550 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). When repairing an MB board, you need to check its components CPU: 9206B, SPI Flash: GD25Q64, MP1471AGJ, TPS54428. Defective elements must be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the CH DMI21-C816RH tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Remember! Attempts to self-repair the TELEFUNKEN TF-LED32S22T2 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-LED32S22T2, Main: JUC7.820.00117550, Panel: M320X13-E1-A (G1)
The appearance of the MainBoard JUC7.820.00117550 is shown in the figure below:JUC7.820.00117550
JUC7.820.00117550 can be used in TVs:
BBK 32LEM-1018/T2C (Panel C320X14-E12-H), DEXP H32B7200C (Panel C320X14-E12-H(G3)), DEXP H32B7400C (Panel C320X14-E3-H (G7)), ERISSON 32LEC2500 (Panel M320X13-E2-B), TELEFUNKEN LED32S22T2 (Panel M320X13-E1-A).
Main features of the TELEFUNKEN TF-LED32S22T2 device:
Installed matrix (LED-panel) M320X13-E1-A (G1).
Matrix control uses Timing Controller (T-CON) 32T24-C0C.
To power the backlight LEDs, a converter combined with the JUC7.820.00117550 main board is used, controlled by the MP4012 PWM controller. The keys of the MDD14N25 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 PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a JUC7.820.00117550 module using CPU chips: 9206B, SPI Flash: GD25Q64, MP1471AGJ, TPS54428 and others.
Tuner CH DMI21-C816RH provides reception of television programs and tuning to channels.
TELEFUNKEN TF-LED32S22T2 TV with LCD M320X13-E1-A, 32 "(81 cm) 16: 9 format diagonal. Screen brightness of 280 cd / m² is provided by LED backlighting. Contrast as the ratio of maximum brightness to minimum brightness, is 2400: 1. The LED panel of this TV is equipped with an edge LED - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in 720p (HD Ready). The input high-frequency or video signal can be processed in analog PAL, SECAM, NTSC systems Graphic processing and digital signal formation is performed in 480i, 480p, 576i, 576p, 720p, 1080i standards Supported multimedia file formats: MP3, WMA, MPEG4, Xvid, MKV, JPEG.
Speaker power of 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, component, VGA, HDMI x3, 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 standards.
Overall dimensions: 735x494x219 mm.
TV weight: 6 kg.
Attention! Panel M320X13-E1-A (G1) LED TV TELEFUNKEN TF-LED32S22T2 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.
