Technical description and composition of the TCL 19D3260 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: 19D3260
Chassis / Version: 40-MTK23L-MAI3XG
Panel: M185XW01 V.F
Power Supply (PSU): PE061C1
PWM Power: FAN6754
MainBoard: 40-MTK23L-MAI3XG
IC MainBoard: CPU: MT8223LFMU, SPI FLASH: 25Q32
Tuner: 07-380FI5-NA12G
Technical Specifications L19D3260
TCL 19D3260
General repair guidelines for TV LCD LED
Possible malfunctions
- TCL 19D3260 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the fault should be sought first in the PE061C1 power supply module. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. FAN6754 PWM controllers, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason can 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.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 40-MTK23L-MAI3XG motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: MT8223LFMU, SPI FLASH: 25Q32 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner 07-380FI5-NA12G. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention to users! Self-repair of the TCL 19D3260 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> TCL 19D3260, Main: 40-MTK23L-MAI3XG, Panel: M185XW01 V.F
The appearance of the MainBoard 40-MTK23L-MAI3XG is shown in the figure below:40-MTK23L-MAI3XG
Main features of the TCL 19D3260 device:
Installed matrix (LED-panel) M185XW01 V.F.
The necessary supply voltages for all nodes of the TCL 19D3260 TV are generated by the PE061C1 power module or its analogs using FAN6754 microcircuits.
MainBoard - the main board (motherboard) is a 40-MTK23L-MAI3XG module, using CPU chips: MT8223LFMU, SPI FLASH: 25Q32 and others.
The 07-380FI5-NA12G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: M185XW01 VF
Type: a-Si TFT-LCD, Panel
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)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3.6 / 1.4 (Tr / Td)
Frequency: 60Hz
Lamp Type: 10S4P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TCL L19D3260 TV with an LCD display, diagonal size 19 "(48 cm) in 16: 9 format. The brightness of the screen declared by the manufacturer is 250 cd / m² by LED backlighting. Contrast - the ratio of maximum brightness to minimum, is at least 1000: 1. Dynamic contrast ratio of 6000: 1 is achieved by special control of the LEDs depending on the lighting in the plot.The edge LED backlighting is realized in the LCD-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pi the signals in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG.
The power of the sound system 10 W (2x5 W) provides 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, audio x3, component, VGA, HDMI x2, 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.
The digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV in the operating mode from the network is 25 watts.
Overall dimensions: with stand 450x327x105 mm, without stand 450x300x41 mm.
TV Weight: 2.8 kg.
Attention! The panel of the TCL L19D3260 LED TV 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.
