Technical description and composition of the THOMSON T22D16DF-01B TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T22D16DF-01B
Chassis / Version: TP.S512.PA63
Panel: LVW220CSDX E1 V2
LED backlight: 4C-LB220T-JF1 JL.D21541330-004KS-M
T-CON: ST2151B01-1-XC-3
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: PA1108DA
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MainBoard: TP.S512.PA63
IC MainBoard: CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P
Tuner: XF-3SDT-H (R840)
Control: IR: 40-40B330-IRF2LG
Specifications T22D16DF-01B
THOMSON T22D16DF-01B
General recommendations for TV LCD LED repair
Possible manifestations of defects
- THOMSON T22D16DF-01B 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 this case, first of all, you should check the operability of the main power source - the AC / DC voltage converter, all the elements of which are located on the MainBoard TP.S512.PA63. Its output voltages should be measured and, in their absence, the power switches and rectifier diodes should be checked for the probability of a short circuit in the converters.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse usually breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in 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) LD5530, in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
As a rule, in such cases there is no display backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- The TV does not turn on, the indicator signals the 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). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
If THOMSON T22D16DF-01B has no image, but there is sound, often the LVW220CSDX E1V2 display backlight simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the LVW220CSDX LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light can be seen through the holes in the panel case.
In this case, the panel may also be faulty - damage to the strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard TP.S512.PA63 often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to use an oscilloscope to trace the passage of LVDS signals from MainBoard TP.S512.PA63, as well as synchronizing signals to loops with drivers.
Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.
If you suspect a malfunction of the XF-3SDT-H (R840) tuner, first of all, you need to make sure the software is correct, as well as the presence of the required supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Attention! Users and owners of T22D16DF-01B TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T22D16DF-01B, Main: TP.S512.PA63, Panel: LVW220CSDX E1 V2
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).
The main features of the THOMSON T22D16DF-01B device:
Installed matrix (LED panel) LVW220CSDX E1 V2.
Matrix control uses Timing Controller (T-CON) ST2151B01-1-XC-3.
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.
MainBoard - the main board (motherboard) is a TP.S512.PA63 module, using CPU: S2T512 chips, SPI Flash: GD25Q64, Audio: YD1517P and others.
Tuner XF-3SDT-H (R840) provides reception of television programs and tuning to channels.
LED TV THOMSON T22D16DF-01B with LCD LVW220CSDX, diagonal size 22 "(56 cm) 16: 9 format. The LCD panel uses direct backlighting with rear-mounted LEDs - Direct LED. The design and technical capabilities of the TV provide viewing in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD) Media formats are supported: MP3, WMA, MPEG4, JPEG.
Speaker power of 10 W (2x5 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, SCART, VGA, HDMI x3, USB. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Attention! The LVW220CSDX E1 V2 panel of the THOMSON T22D16DF-01B LED TV is an expensive and unreliable element.
Do not allow any impact 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.
