Technical description and composition of the TELEFUNKEN TF-LED22S14T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED22S14T2
Chassis / Version: CV512L-Q24
Panel: M215HVN01.0 (CX215DLEDM)
LED backlight: EDGE LED
T-CON: 21M07-C04
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3367A
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: CV512L-Q24 M215HVN01.0 Ctrl BD
IC MainBoard: CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P
Tuner: CDT-9NT372-RD60
TF-LED22S14T2 Specifications
TELEFUNKEN TF-LED22S14T2
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The TELEFUNKEN TF-LED22S14T2 TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
A malfunction in such cases, first of all, should be sought in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the MainBoard CV512L-Q24 main board. It is necessary to measure its output supply voltages, and if they are absent, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and, less often, the current sensor in the source of the key.
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, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
Usually, in such cases, a malfunction is detected in the nodes of the backlight of the LED panel. 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.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
Before replacing the CDT-9NT372-RD60 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the TELEFUNKEN TF-LED22S14T2 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 SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TELEFUNKEN Chassis CV512L-Q24
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> TELEFUNKEN TF-LED22S14T2, Main: CV512L-Q24, Panel: M215HVN01.0 (CX215DLEDM)
The appearance of the MainBoard CV512L-Q24 is shown in the figure below:CV512L-Q24
Main features of the TELEFUNKEN TF-LED22S14T2 device:
The matrix (LED panel) M215HVN01.0 (CX215DLEDM) is installed.
Matrix control uses Timing Controller (T-CON) 21M07-C04.
To power the backlight LEDs, a converter combined with the CV512L-Q24 main board is used, controlled by the BIT3367A PWM controller.
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 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-LED22S14T2 with LCD M215HVN01.0, diagonal size 21.5 "(55 cm) 16: 9. The brightness of the screen is 200 cd / m² provided by LED backlight. Contrast, as the ratio of maximum brightness to minimum, is 3000 : 1. The technology for manufacturing the screen of this TV model is realized with LED backlighting.The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Supported media file formats: MP3 , WMA, Xvid, DivX, MKV, JPEG.
The power of the sound system of 6 W (2x3 W) is 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 503x332x165 mm, without stand 503x304x80 mm.
TV weight: 2.2 kg.
Attention! Panel M215HVN01.0 (CX215DLEDM) LED TV TELEFUNKEN TF-LED22S14T2 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.