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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Saturday, 2 May 2020

REPAIR / SERVICING TV MYSTERY MTV-3204W

Technical description and composition of the MYSTERY MTV-3204W TV, panel type and applicable modules. The composition of the modules.
MYSTERY
Model: MTV-3204W
Chassis / Version: V1H08
Panel: AX080D002F
T-CON: T-CON TCON102A-F
Inverter (backlight): HIU-812-M (S)
PWM Inverter: BD9897FS
Power Supply (PSU): RSAG7.820.1032 / ROH VER: H
PWM Power: NCP1207A
MOSFET Power: N80C, 17A06
MainBoard: RSAG7.820.1298 / ROH VER: A
IC MainBoard: IF-PL: TDA9886TS, Flash: F40-100GCP_BF08, EEPROM: 24C32AN-1E4B, Sound: TDA729,
Tuner: TDQ-6FT / W1126H \ ROH
Technical Specifications MTV-3204W
MYSTERY MTV-3204W
General recommendations for repairing TV LCD
MYSTERY with the V1H08 chassis, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the RSAG7.820.1032 / ROH VER: H power supply module malfunctions, the external manifestations may be different, for example, the MYSTERY MTV-3204W does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good 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.
If the motherboard is faulty RSAG7.820.1298 / ROH VER: A, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. If it is not possible to replace the MB board (SSB), you need to check the health of its elements - IF-PL: TDA9886TSFlash: F40-100GCP_BF08, EEPROM: 24C32AN-1E4B, Sound: TDA729,. Defective components should be replaced.
Remember! Attempts to self-repair by users of the MYSTERY MTV-3204W TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-3204W (V1H08), Main RSAG7.820.1298/ROH VER:A, Panel AX080D002F


 The appearance of the MainBoard RSAG7.820.1298 is shown in the figure below:
RSAG7.820.1298
The appearance of the power supply
Main features of the MYSTERY MTV-3204W device:
Installed matrix (LCD-panel) AX080D002F.
The matrix control uses the Timing Controller (T-CON) T-CON.
To power the backlight, an HIU-812-M inverter is used, controlled by the BD9897FS PWM controller.
The necessary supply voltages for all nodes of the MYSTERY MTV-3204W TV are generated by the RSAG7.820.1032 power module or its analogs using NCP1207A microcircuits and power switches of the N80C, 17A06 type.
MainBoard - the main board (motherboard) is an RSAG7.820.1298 module using IF-PL: TDA9886TS, Flash: F40-100GCP_BF08, EEPROM: 24C32AN-1E4B, Sound: TDA729, and others.
The TDQ-6FT / W1126H \ ROH tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: IPS Alpha
Model: AX080D002F
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS-Pro, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare
Brightness: 450 cd / m²
Contrast Ratio: 850: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 16 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
MYSTERY MTV-3204W TV with AX080D002F LCD, 32 "(81 cm) diagonal size in 16: 9 format. The brightness of the screen is 450 cd / m² with CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 800: 1. It is possible to 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. Graphic processing and digital signal generation takes place in one hundred Standard 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the speaker system is 10 W (2x5 W). 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, S-Video, 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.
The power consumed by the TV in the operating mode from the network is 170 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The AX080D002F panel of the MYSTERY MTV-3204W 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!
Posted By: FRANK at 04:50
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