Technical description and composition of the TELEFUNKEN TF-LED19S58T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED19S58T2
Chassis / Version: TP.S512.PA63
Panel: LC185TT7A
LED backlight: 185C32M04X12-C0079 1.30.1.185C3201R V1
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: PA1108DA
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MOSFET Power: N-FET TO-252
MainBoard: TP.S512.PA63
IC MainBoard: CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P
Tuner: XF-3SDT-H (R840)
TF-LED19S58T2 Specifications
TELEFUNKEN TF-LED19S58T2
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TELEFUNKEN TF-LED19S58T2 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
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 TP.S512.PA63 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 (N-FET TO-252) and rectifier diodes should be checked for a possible breakdown (short circuit).
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.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) LD5530, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
As a rule, in this case, the backlight of the LED panel is faulty. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power supply (LED driver).
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, the indicator signals standby or operating mode, or blinks.
Repair or diagnostics of the TP.S512.PA63 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). Often the MB (SSB) board needs to be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
The XF-3SDT-H (R840) tuner malfunction is established after checking the software and all supply voltages at its terminals. The I2C bus data exchange between the tuner and the processor can be monitored with an oscilloscope.
Attention to users! Self-repair of the TELEFUNKEN TF-LED19S58T2 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis TP.S512.PA63
The appearance of the MainBoard TP.S512.PA63 is shown in the figure below:TP.S512.PA63
TP.S512.PA63 can be used in TVs:
AIWA 24LE7021 (Panel V236BJ1-P03), ERISSON 22LES71T2 (Panel A215EE1TBA-9), FUSION FLTV-24H100T (Panel CM238C01), SUPRA STV-LC22T800FL (Panel C215F14-E1-P), THOMSON T24E14DF-01B (Panel HM236WU3-101).
Main features of the TELEFUNKEN TF-LED19S58T2 device:
Installed matrix (LED panel) LC185TT7A.
To power the backlight LEDs, a converter combined with the TP.S512.PA63 main board is used, controlled by the SN51DP PWM controller. The keys of the PA1108DA 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 LD5530 microcircuits and N-FET TO-252 power switches.
MainBoard - the main board (motherboard) is a TP.S512.PA63 module, using CPU chips: S2T512, SPI Flash: GD25Q64, Audio: YD1517P and others.
Tuner XF-3SDT-H (R840) provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: PANDA
Model: LC185TT7A
Type: a-Si TFT-LCD, CELL
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.4% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TELEFUNKEN TF-LED19S58T2 LCD TV, diagonal size 18.5 "(47 cm), 16: 9 format. Screen brightness of 180 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 600: 1. The technology of manufacturing 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, DivX, MKV, JPEG.
The power of the sound system is 6 W (2x3 W), provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, 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 440x302x153 mm, without stand 440x274x43 mm.
TV weight: 2.2 kg.
Attention! The panel of TELEFUNKEN TF-LED19S58T2 LED TV 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.