Technical description and composition of the FUSION FLTV-28T25 TV, type of panel and applicable modules. The composition of the modules.FUSION LED
Model: FLTV-28T25
Chassis / Version: V1N05
Panel: LVW280CS0T E11 V3
LED backlight: XC262-4C-LB280T-DB1-20140217
T-CON: MT3151A05-3-XC-1
LED driver (backlight): integrated into PSU; LED DRV = 31.5V
PWM LED driver: MP3394
MOSFET LED driver: AOD458, SM1110NS
Power Supply (PSU): IPE06R41 81-PBE028-G01
PWM Power: TEA1733, MC34063
MOSFET Power: 7N65, AOD4185
MainBoard: 40-T31TOT-MAB2HG
IC MainBoard: Spi Flash: Winbond 25Q64FVSIG
Tuner: RF221ZN V4D17AA
Technical Specifications FLTV-28T25
FUSION FLTV-28T25
General repair guidelines for TV LCD LED
Possible manifestations of defects
- FUSION FLTV-28T25 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 IPE06R41 power supply is usually faulty. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (7N65, AOD4185) of converters and rectifier diodes for the presence of a possible 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.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode, or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) TEA1733, MC34063, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 40-T31TOT-MAB2HG 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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - Spi Flash: Winbond 25Q64FVSIG. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the tuner RF221ZN V4D17AA may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Owners and users of the FUSION FLTV-28T25 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!
SCHEMATIC DIAGRAM FOR POWER SUPPLY ------------------> IPE06R41
FIRMWARE FOR SPI FLASH -----------> FUSION FLTV-28T25 V1N05, Main: 40-T31TOT-MAB2HG, Panel: LVW280CS0T E11 V3
To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).
Repair MainBoard
The appearance of the MainBoard 40-T31TOT-MAB2HG is shown in the figure below:
40-T31TOT-MAB2HG
40-T31TOT-MAB2HG can be used in TVs:
ERISSON 32LET40 (Panel LVW320CSOT E45 V11 T8-32T3510-LPM8), ERISSON 28LET40 (Panel LVW280CSOT E19 V2), FUSION FLTV-24T25 (Panel LVW240CMOT E12 V6), MYSTERY MTV-3227LT2 (Panel LVW320CSOT E45 V11 720p HD 1366x768), MYSTERY MTV-4225LT2 (Panel LVF420CMOT - E18.V1), SUPRA STV-LC32T662WL (Panel LWV320CSOT E45 V16 (T8-32T3520-LPM10)).
The appearance of the power supply
Main features of the FUSION FLTV-28T25 device:
Installed matrix (LED panel) LVW280CS0T E11 V3.
The matrix control uses the Timing Controller (T-CON) MT3151A05-3-XC-1.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3394 PWM controller. As power elements of the LED driver, keys of the type AOD458, SM1110NS are used.
The necessary supply voltages for all nodes of the FUSION FLTV-28T25 TV are generated by the IPE06R41 power module or its analogs using TEA1733, MC34063 microchips and 7N65, AOD4185 type power switches.
MainBoard - the main board (motherboard) is a 40-T31TOT-MAB2HG module, using Spi Flash chips: Winbond 25Q64FVSIG and others.
The tuner RF221ZN V4D17AA provides the reception of television programs and tuning to channels.
FUSION FLTV-28T25 TV with LVW280CS0T LCD display, diagonal size 28 "(71 cm) in 16: 9 format. The required screen brightness of 280 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs. The LED panels of this TV are equipped with edge LED backlighting - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for 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 Supported media file formats: MP3, JPEG.
The power of the sound system 6 W (2x3 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), SCART, 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.
The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2 standards.
Overall dimensions: 550x410x90 mm.
Attention! The panel of the LVW280CS0T E11 V3 LED-TV FUSION FLTV-28T25 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.