Monday, 4 May 2020

REPAIR / SERVICING TV FUSION FLTV-19W7

Technical description and composition of the FUSION FLTV-19W7 TV, panel type and applicable modules. The composition of the modules.
Fusion
Model: FLTV-19W7
Chassis / Version: CVMV26L-B
Panel: HK185WLCM-CH7IH // M185B1-P01
MainBoard: CVMV26L-B
IC MainBoard: CPU: TSUMV26KE-LF; SPI Flash: F40 512 Kb;
Tuner: F21WT-3BAR-E
Technical Specifications FLTV-19W7
FUSION FLTV-19W7
General recommendations for repairing TV LCD
Repair and diagnostics of any electronic device, in particular FUSION FLTV-19W7, it is advisable to start with a careful external examination of internal and external elements. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
Sometimes the FUSION FLTV-19W7 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, you must check the standby batteries on the Main Board. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the FUSION FLTV-19W7 TV does not have an image, but there is sound, the malfunction should be sure that the backlight power converter (inverter) is working properly. It is also necessary to check the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for excessive ESR. If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
If the CVMV26L-B motherboard is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement. When repairing an MB board, you must check its CPU components: TSUMV26KE-LF; SPI Flash: F40 512 Kb; . Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Attention! Users and owners of FLTV-19W7 TVs who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.


FIRMWARE FOR SPI FLASH  ----------->  FUSION FLTV-19W7, Main: CVMV26L-B, Panel: HK185WLCM-CH7IH M185B1-P01

 The appearance of the MainBoard CVMV26L-B-20 is shown in the figure below:
CVMV26L-B-20
CVMV26L-B-20 can be used in TVs:
ERISSON 19LEJ02 (Panel LM185WH2 (TL)(A1)), ERISSON 19LEJ10 (Panel 720p HD 1366x768), FUSION FLTV-15W7 (Panel LTN156AT05), HYUNDAI H-LEDVD24V2 (Panel M236MWF1), HYUNDAI H-LEDVD22V2 (Panel M215H1-L01), SUPRA STV-LC2225WL (Panel MT215DW01 V.1), SUPRA STV-LC2425WL STV-LC2225WL (Panel M236MWF1 M216H1-L01), SUPRA STV-LC1925WL (Panel MT185GW01 V.1), SUPRA STV-LC1925W (Panel MT185GW01 V.1), SUPRA STV-LC22390FD (Panel HM215WU1-300), SUPRA STV-LC2244FL (Panel MT215DW02 V.0).
Main features of the FUSION FLTV-19W7 device:
Installed matrix (LCD panel) HK185WLCM-CH7IH or M185B1-P01.
The required supply voltage for all nodes of the FUSION FLTV-19W7 TV provides a switching power supply.
MainBoard - the main board (motherboard) is a CVMV26L-B module, using CPU chips: TSUMV26KE-LF; SPI Flash: F40 512 Kb; and others.
The F21WT-3BAR-E tuner provides television reception and channel tuning.
FUSION FLTV-19W7 TV with HK185WLCM-CH7IH LCD, 19 "(48 cm) diagonal size in 16: 9 format. 250 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 2800: 1 is provided by special control of the backlight depending on the illumination of areas in the plot. 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. Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the acoustic system of sound 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), AV, audio x2, component, SCART, RGB, VGA, HDMI. 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, 1280x1024, 1360x768.
The power consumed by the TV working in the network mode is 55 watts.
Overall dimensions: with stand 457x344x162 mm, without stand 457x293x49 mm.
Mass of the TV: 3.2 kg.
Attention! The FKION FLTV-19W7 LCD TV panel HK185WLCM-CH7IH is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!