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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Monday, 13 July 2020

REPAIR / SERVICING TV SUPRA STV-LC2410FD

Technical description and composition of the TV SUPRA STV-LC2410FD, type of panel and applicable modules. The composition of the modules.
SUPRA
Model: STV-LC2410FD
Chassis / Version: V1K05
Panel: M236MWF1
Lamp backlight: 4 LAMP CCFL
Inverter (backlight): IV0190415
PWM Inverter: TL494C
MOSFET Inverter: ME4542
Power Supply (PSU): AYP172003
MainBoard: JUG7.820.638-3 LS07 2010.12.28
IC MainBoard: CPU: TSUMV26KE-LF, Spi Flash: GD25Q40T, Eeprom: 24LC32
Tuner: TAF6-C2121VH
Technical Specifications STV-LC2410FD
SUPRA STV-LC2410FD
General repair guidelines for TV LCD
Possible malfunctions
- The SUPRA STV-LC2410FD TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
With similar manifestations, in some cases, the AYP172003 power module is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- 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.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you should ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
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.
- 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 JUG7.820.638-3 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 - Cpu: TSUMV26KE-LF, Spi Flash: GD25Q40T, Eeprom: 24LC32. Defective components should be replaced.
The malfunction of the TAF6-C2121VH tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

Attention to users! Self-repair of a TV SUPRA STV-LC2410FD without the appropriate qualifications and necessary experience can lead to its complete non-repairability!


FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2410FD V1K05, Main: JUG7.820.638-3 LS07 2010.12.28, Panel: M236MWF1



 The appearance of the MainBoard JUG7.820.638-3 is shown in the figure below:
JUG7.820.638-3
The appearance of the power supply
Key Features of SUPRA STV-LC2410FD:
The matrix (LCD panel) M236MWF1 is installed.
To power the backlight, the inverter IV0190415 is used, it is controlled by the PWM controller TL494C. Keys of type ME4542 are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC2410FD TV is carried out by the AYP172003 power module, or its analogues.
MainBoard - the main board (motherboard) is a JUG7.820.638-3 module, using Cpu chips: TSUMV26KE-LF, Spi Flash: GD25Q40T, Eeprom: 24LC32 and others.
The TAF6-C2121VH tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: IVO
Model: M236MWF1 R0
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV SUPRA STV-LC2410FD with LCD M236MWF1, diagonal size 24 "(60 cm), 16: 9 format. The brightness of the screen is 300 cd / m² with CCFL (EEFL) fluorescent lamps. Contrast - the ratio of maximum brightness to minimum is 1000: 1. Dynamic contrast ratio of 4000: 1 is achieved by special control of the backlight. TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD). The input high-frequency or video signal is decoded 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, MPEG4, VideoCD, SVCD, JPEG.
The power of the sound system 4 W (2x2 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 x3, S-Video, component, 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.
Overall dimensions: 640x471x145 mm.

Attention! The M236MWF1 panel of a SUPRA STV-LC2410FD LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen surface to avoid permanent damage to the LCD panel!
Posted By: FRANK at 06:27
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