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 7 August 2020

REPAIRING / SERVICING TV SUPRA STV-LC3239W

Technical description and composition of the SUPRA STV-LC3239W TV, panel type and modules used. The composition of the modules.
SUPRA
Model: STV-LC3239W
Chassis / Version: CV182H-J
Panel: V315B5-L10
MainBoard: CV182H-J
IC MainBoard: CPU: MST6E182VS-LF-Z1, Flash: 25Q32
Tuner: QINGJIA AFT7 / W110G
STV-LC3239W Specifications
SUPRA STV-LC3239W
General recommendations for TV LCD repair
SUPRA TV made on the CV182H-J chassis, like many other electronic devices, it is advisable to start repairing with an inspection of all external and internal elements. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred layer of paint on the resistors - all this for the repairman can be a significant clue in assumptions about the causes and consequences of a malfunction.
If the TV does not turn on, none of the indicators on its front panel are on or blinking. Also, if the TV does not respond to the remote control and buttons, does not emit any sounds or any signs of operability when turned on, there is a certain probability that the power module is faulty and needs repair. Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain SUPRA models. It is advisable to start diagnostics of the power supply module by checking the condition 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 a breakdown state in such situations.
As a rule, switches in switching power supplies (SMPS) are quite reliable and rarely fail without reasons that should be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM microcircuit is checked by replacing it with a known good one.
Sometimes the SUPRA STV-LC3239W TV does not have a picture, but there is sound, or the picture appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or the lamps themselves, which can be checked by replacing. In such cases, it is necessary to make sure that all electrolytic capacitors of the filter are in good working order for the power supply of the inverter itself, including the power supply unit (power supply unit). When disabling the protection of the inverter (to enable diagnostics), special care must be taken due to the risk of failure of the power elements. After the completion of all repair work, it is imperative to restore the protection circuits for the full and safe further operation of the TV by the user.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - Flash 25Q32, 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 pins with the board (indicated by warming up).
Remember! Attempts to repair the SUPRA STV-LC3239W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

 DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   SUPRA STV-LC3239W, Main: CV182H-J, Panel: V315B5-L10


 The appearance of the MainBoard CV182H-J is shown in the figure below:
CV182H-J
CV182H-J can be used in TVs:
SUPRA STV-3239W STV-LC3239W (Panel LTA320AN01), SUPRA STV-LC3239W (Panel V315B5-L10), SUPRA STV-LC3239F (Panel LTA320HN02).
Main features of SUPRA STV-LC3239W device:
Installed matrix (LCD panel) V315B5-L10.
The necessary supply voltages for all nodes of the SUPRA STV-LC3239W TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a CV182H-J module, using CPU chips: MST6E182VS-LF-Z1, Flash: 25Q32 and others.
Tuner QINGJIA AFT7 / W110G provides reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC3239W Version V2L06
Panel type (matrix): T315CK06-BW1 HD,
Motherboard: CV182H-F, W25Q32, Tuner: 3SP5I2-37
PSU: LK-PI320402A a,
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V315B5-L10
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA LCD TV STV-LC3239W with LCD V315B5-L10, 32 "(81 cm) 16: 9. Brightness 450 cd / m² backlit CCFL (EEFL) fluorescent lamps. Dynamic Contrast Ratio 80000: 1 achieved by special control of the backlight.It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic decomposition of 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital formation signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported media file formats: MP3, MPEG4, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, component, SCART, VGA, HDMI x4, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
The power consumed by the TV in operating mode from the network is 90 watts.
Overall dimensions: 800x590x210 mm.
TV weight: 13.4 kg.
Attention! SUPRA STV-LC3239W LCD TV panel V315B5-L10 is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!
Posted By: FRANK at 05:15
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