REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Friday 3 July 2020

REPAIR / SERVICING TV FUSION FLTV-29L28B

Technical description and composition of the FUSION FLTV-29L28B TV, panel type and applicable modules. The composition of the modules.
FUSION LED
Model: FLTV-29L28B
Chassis / Version: V1L10
Panel: TC290BPE1-MA1
MainBoard: TP.MS18VG.P83C
IC MainBoard: EN25Q32
Technical Specifications FLTV-29L28B
FUSION FLTV-29L28B
General repair guidelines for TV LCD LED
Repair of the FUSION FLTV-29L28B TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Malfunctions of the power module can be expressed in different ways, for example, the FUSION FLTV-29L28B does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
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, when you turn on the TV, the image appears and immediately disappears, or is missing initially when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (power converter for the backlight LED panel TC290BPE1-MA1). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
In most cases of lack of backlight, there is a need to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
An open in the LED lines connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Diagnostics and repair of the TP.MS18VG.83C motherboard is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing EN25Q32 components requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Attention to the owners! Attempts at self-repair of the FUSION FLTV-29L28B TV are not recommended by the manufacturer and can lead to serious negative consequences!
FLASH FUSION FLTV-29L28B V1L10, Main: TP.MS18VG.83C, Panel: TC290BPE1-MA1


 In the event of a failure in the software of the SPI FLASH chip from Winbond, we recommend that you replace it with a new one. Sometimes faulty SPI Winbond microcircuits can be restored for a while after a soldering station is heated by a hairdryer. Usually this is enough to read its contents.
Repair MainBoard
The appearance of MainBoard TP.MS18VG.P83C is shown in the figure below:
TP.MS18VG.P83C
TP.MS18VG.P83C can be used in TVs:
FUSION FLTV-32L28B (Panel TH315B051-MD1), FUSION FLTV-29L28B (Panel TC290BPE1-MA1).
Main features of the FUSION FLTV-29L28B device:
The matrix (LED panel) TC290BPE1-MA1 is installed.
The required supply voltage for all nodes of the TV FUSION FLTV-29L28B provides a switching power supply.
MainBoard - the main board (motherboard) is a TP.MS18VG.P83C module, using EN25Q32 chips and others.
FUSION FLTV-29L28B TV with LCD display TC290BPE1-MA1, diagonal size 29 "(74 cm) 16: 9 format. The required brightness of the screen 350 cd / m² is provided by LED backlight LED. Dynamic contrast 80000: 1 is achieved by special control of the LEDs The LED-panel of this TV is equipped with LED end-lighting - 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 analogue 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, MKV, JPEG.
The power of the sound system 16 W (2x8 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 x2, component, SCART, RGB, VGA, HDMI x3, 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.
Overall dimensions: 850x570x115 mm.
Mass of the TV: 12.3 kg.

Attention! The TC290BPE1-MA1 panel of the FUSION FLTV-29L28B 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.
Posted By: FRANK at 07:26
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