Monday 4 May 2020

REPAIR / SERVICING TV FUSION FLTV-19W6D

Technical description and composition of the FUSION FLTV-19W6D TV, panel type and applicable modules. The composition of the modules.
Fusion
Model: FLTV-19W6D
Chassis / Version: CVMV26L-G
Panel: TM190MFS01
Inverter (backlight): integrated into PSU
Trans Inverter: BCK-19275WH
Power Supply (PSU): IPB322S2
PWM Power: OB2263 (PWM SOT23-6)
MOSFET Power: STK0460
Mainboard: CVMV26L-G
IC MainBoard: CPU: TSUMV26KE-LF; SPI Flash: F40-100CGP; EEPROM: 24LC32A;
Tuner: F21WT-3BAR-E
Technical Specifications FLTV-19W6D
FUSION FLTV-19W6D
General recommendations for repairing TV LCD
An external examination of the external and internal elements should be carried out in a timely manner before the start of operations for their dismantling. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Experienced repairmen are well aware of how ring cracks in soldered terminals look, swollen capacitors, and other causes of problems in electronic devices.
Malfunctions of the power module can be expressed in different ways, for example, the FUSION FLTV-19W6D does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. It should be remembered that when the protection is turned off in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - CPU: TSUMV26KE-LF; SPI Flash: F40-100CGP; EEPROM: 24LC32A; which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Attention! For users and owners of FLTV-19W6D TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.


FIRMWARE FOR SPI FLASH  ----------->   FUSION FLTV-19W6D, Main: CVMV26L-G, Panel: TM190MFS01
 The appearance of the MainBoard CVMV26L-G is shown in the figure below:
CVMV26L-G
The CVMV26L-G motherboard uses the TSUMV26KE-LF processor (TSUMV36KE-LF), combined with a scaler, SPI FLASH 520Kb ROM and EEPROM 24C02C.
It is advisable to begin repairing the MainBoard by checking the voltage converters and linear stabilizers necessary to provide power in the operating and standby modes. Check the power supply of the 5V or 12V LCD panel, depending on the type of panel used, it is necessary to measure directly on the LVDS connector. If, in the presence of the necessary supply voltage, the TV does not exit Stand-by mode, does not respond to the remote control and control buttons, the SPI Flash software should be updated.
CVMV26L-G can be used in TVs:
FUSION FLTV-16W7 (Panel M156MWR1), FUSION FLTV-19W6D (Panel TM190MFS01), SUPRA STV-LC1917W (Panel HE185WX1-100), SUPRA STV-LC2417F STV-LC2417FD (Panel M236H1-P01).
Main features of the FUSION FLTV-19W6D device:
Installed matrix (LCD panel) TM190MFS01.
To power the backlight, a converter is used, combined with a power supply. The transformer BCK-19275WH is installed in the inverter converter.
The necessary supply voltages for all nodes of the FUSION FLTV-19W6D TV are generated by the IPB322S2 power module or its analogs using OB2263 chips (PWM SOT23-6) and power switches of the STK0460 type.
MainBoard - the main board (motherboard) is a CVMV26L-G module, using CPU chips: TSUMV26KE-LF; SPI Flash: F40-100CGP; EEPROM: 24LC32A; and others.
The F21WT-3BAR-E tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: TIANMA
Model: TM190MFS01
Type: a-Si TFT-LCD, CELL
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
FUSION FLTV-19W6D TV with LCD monitor TM190MFS01, diagonal size 19 "(48 cm) 16:10 format. Brightness of the screen glow 300 cd / m² backlighted with fluorescent lamps CCFL (EEFL). Dynamic contrast 2000: 1 provides special control of work illumination depending on the illuminated areas in the plot. You can view images in high quality HD at a resolution of 1440x900 pixels 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 image elaboration and formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, MPEG4, DivX, VideoCD, SVCD, 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), AV, audio x2, S-Video, SCART, RGB, 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.
The power consumed by the TV working in the network mode is 60 watts.
Overall dimensions: 532x435x155 mm.
TV Weight: 5.5 kg.
Attention! The TM190MFS01 LCD panel of the FUSION FLTV-19W6D LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!