Technical description and composition of the TCL 29T2100 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: 29T2100
Chassis / Version: MS82D
Panel: V290BJ1-LE1 Rev. C1
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9976
Power Supply (PSU): SHG2901A-101H
MainBoard: 40-0MS82D-MAD2LG OLQ107121D29
IC MainBoard: CPU: MST6M182VG-LF-Z1, SPI Flash: 25Q32, Audio: STA380BW
Tuner: XF-3SA
Specifications 29T2100
TCL 29T2100
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The TCL 29T2100 does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, the SHG2901A-101H power module usually fails. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the 40-0MS82D-MAD2LG motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing elements MST6M182VG-LF-Z1, 25Q32 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 warming up.
The malfunction of the XF-3SA tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners and users of the TCL 29T2100 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual / schematic diagram ---------------------> TCL 29T2100 Chassis MS82D .
FIRMWARE SPI FLASH -----------> TCL 29T2100 MS82D , Main: 40-0MS82D-MAD2LG, Panel: V290BJ1-LE1 Rev.C1
The appearance of the MainBoard 40-0MS82D-MAD2LG is shown in the figure below:40-0MS82D-MAD2LG
40-0MS82D-MAD2LG can be used in TVs:
MYSTERY MTV-3012W (Panel V290BJ1-L01 Rev.C1 ), TCL 29T2100 (Panel V290BJ1-LE1 Rev.C1), TCL 29B340 (Panel V290BJ1-L01).
The appearance of the power supply
Main features of the TCL 29T2100 device:
Installed matrix (LED-panel) V290BJ1-LE1 Rev.C1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9976 PWM controller.
The formation of the necessary supply voltages for all nodes of the TCL 29T2100 TV is carried out by the SHG2901A-101H power supply module, or its analogues.
MainBoard - the main board (motherboard) is a 40-0MS82D-MAD2LG module using CPU chips: MST6M182VG-LF-Z1, SPI Flash: 25Q32, Audio: STA380BW and others.
The XF-3SA tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V290BJ1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 29.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 631.092x354.816 mm
Surface: Antiglare (Haze 3.5%)
Brightness: 300 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 9.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TCL 29T2100 TV with V290BJ1-LE1 LCD display, diagonal size 29 "(74 cm) in 16: 9 format. The brightness of the screen declared by the manufacturer, 400 cd / m² is realized by LED backlighting. Dynamic contrast 25000: 1 is achieved by special control of LEDs Depending on the lighting in the plot, the LCD panel of this TV has end-face LED backlighting - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Input high-frequency illumination . Video can be processed in analog PAL, SECAM system, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, MPEG4, MKV, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide two speakers. The audio processing system NICAM STEREO 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, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
Attention! The TCL 29T2100 LED TV panel V290BJ1-LE1 Rev. C1 is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.