Technical description and composition of the TELEFUNKEN TF-LED19S46T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED19S46T2
Chassis / Version: CV512L-Q24
Panel: M195XTN01.0
LED backlight: Edge LED
T-CON: M195XTN01 0 CTRL BD 19M15-C02
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3367A
MOSFET LED driver: MMBT3904
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MOSFET Power: MMIS70R900P (TO-252)
MainBoard: CV512L-Q24
IC MainBoard: CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P
Tuner: CDT-9NT372-RD60
TF-LED19S46T2 Specifications
TELEFUNKEN TF-LED19S46T2
General recommendations for TV LCD LED repair
Possible manifestations of defects
- TELEFUNKEN TF-LED19S46T2 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 CV512L-Q24 main board. Its output voltages should be measured and, in their absence, the power switches (MMIS70R900P (TO-252)) and rectifier diodes should be checked for the probability of a short circuit in the converters.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work in an emergency mode in a short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers LD5530, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
In such cases, the most likely malfunction of the LED panel backlighting elements. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
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 CV512L-Q24 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). Complex repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements of the CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P. Malfunctions in BGA chips are usually easy to detect by warm-up.
Before changing the CDT-9NT372-RD60 tuner, if it is not possible to tune to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Owners and users of the TELEFUNKEN TF-LED19S46T2 TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> TELEFUNKEN TF-LED19S46T2, Main: CV512L-Q24, Panel: M195XTN01.0
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TELEFUNKEN MainBoard CV512L-Q24
The appearance of the MainBoard CV512L-Q24 is shown in the figure below:CV512L-Q24
The main features of the TELEFUNKEN TF-LED19S46T2 device:
Installed matrix (LED-panel) M195XTN01.0.
Matrix control uses the M195XTN01 Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with the CV512L-Q24 main board is used, controlled by the BIT3367A PWM controller. The keys of the MMBT3904 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 converter circuit using LD5530 microcircuits and MMIS70R900P (TO-252) power switches.
MainBoard - the main board (motherboard) is a CV512L-Q24 module, using CPU chips: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P and others.
The CDT-9NT372-RD60 tuner provides reception of television programs and tuning to channels.
TV TELEFUNKEN TF-LED19S46T2 with LCD display M195XTN01.0, diagonal 19 "(48 cm) 16: 9. The brightness of the screen is 230 cd / m2 provided by LED backlight. 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 graphic decomposition of 720p (HD Ready). Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX , MKV, JPEG.
The power of the acoustic system of sound is 10 W (2x5 W), 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, VGA, HDMI, USB. A headphone output is provided.
The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: With stand 463x305x140 mm, Without stand 463x272x86 mm.
Attention! Panel M195XTN01.0 LED TV TELEFUNKEN TF-LED19S46T2 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 unrepairable.