Technical description and composition of the THOMSON T22E32HU TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T22E32HU
Chassis / Version: CV181L-Y
Panel: LM215WF4 (TL) (E7)
T-CON: LM215WF4-TLE7
LED driver (backlight): with integrated PSU
Power Supply (PSU): MP113-QL 1
PWM Power: BIT3251, BA1T18
MainBoard: CV181L-Y
IC MainBoard: 1517P, 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH
Tuner: CDT3SP512-37
Specifications T22E32HU
THOMSON T22E32HU
General recommendations for TV LCD LED repair
Possible malfunctions
- THOMSON T22E32HU TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or blink, the TV does not respond to the remote control and control buttons.
In such cases, you should start looking for a fault in the MP113-QL power supply circuits. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
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) BIT3251, BA1T18, if they do not have visible damage to the case and an open short circuit between the terminals, are usually checked by replacing.
- 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.
In some of these cases, the malfunction is caused by the lack of display backlighting. 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 go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the CV181L-Y 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 must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - 1517P, 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH 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.
Before replacing the CDT3SP512-37 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus.
If THOMSON T22E32HU has no picture, but there is sound, often the display backlight LM215WF4 (TL) (E7) 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 LM215WF4 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 you can see light through the holes in the panel case.
In this case, the panel may also be faulty - damage to 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 CV181L-Y 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard CV181L-Y with an oscilloscope, as well as synchronization signals to the 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.
Remember! Attempts to self-repair the THOMSON T22E32HU 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 -----------> THOMSON T22E32HU, Main: CV181L-Y, Panel: LM215WF4 (TL)(E7)
The appearance of the MainBoard CV181L-Y is shown in the figure below:The CV181L-Y motherboard uses an MST6M181VG processor, combined with a scaler and installed using the BGA technology.
It is advisable to start repairing this MainBoard with checking the linear stabilizers and voltage converters required to provide power to the processor units: 1.2V, 2.5V, 3.3V. If there is no image, but the display backlight is working properly, it is necessary to check the power supply of the LCD panel 5V or 12V, depending on the type of panel used, which is advisable to measure directly on the LVDS connector. If, with the necessary supply voltages, the TV does not come out of Stand-by mode, does not respond to the remote control and control buttons, you should update the SPI Flash software.CV181L-Y can be used in TVs:
FUSION FLTV-19L16B (Panel M185B3-PA1), SUPRA STV-LC1977WLD (Panel M185BGE-P02), SUPRA STV-LC2477FLD (Panel HK236WLEDM-IH61H), THOMSON T22E32HU (Panel LM215WF4 (TL)(E7)).
External view of the power supply
The main features of the THOMSON T22E32HU device:
Installed matrix (LED-panel) LM215WF4 (TL) (E7).
Matrix control uses Timing Controller (T-CON) LM215WF4-TLE7.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the THOMSON T22E32HU TV is carried out by the MP113-QL power module, or its analogues using BIT3251, BA1T18 microcircuits.
MainBoard - the main board (motherboard) is a CV181L-Y module, using 1517P, 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH and others.
The CDT3SP512-37 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LM215WF4-TLE7
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV THOMSON T22E32HU with LCD LM215WF4, diagonal size 22 "(56 cm) 16: 9 format. : 1. The LCD panel uses Edge LED backlighting The design and technical capabilities of the TV allow viewing in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal is decoded into analog systems PAL, SECAM, NTSC Formation of digital signal (graphic format) is performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i Multimedia formats are supported: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 6 W (2x3 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, audio x2, component, SCART, VGA, HDMI, USB. A headphone jack is provided. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The power consumed by the TV from the network in the operating mode is not more than 46 W.
Overall dimensions: 554x390x170 mm.
Attention! The LM215WF4 (TL) (E7) panel of the THOMSON T22E32HU 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.
