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 1 May 2020

REPAIR / SERVICING TV MYSTERY MTV-2205W

Technical description and composition of the MYSTERY MTV-2205W TV, panel type and applicable modules. The composition of the modules.
MYSTERY
Model: MTV-2205W
Chassis / Version: T.VST26.3B 10104
Panel: V216B1-L01
MainBoard: T.VST26.3B 10104
IC MainBoard: SPI Flash: MX25L8005;
Tuner: TDQ-ATF27WT-F
Technical Specifications MTV-2205W
MYSTERY MTV-2205W
General recommendations for repairing TV LCD
MYSTERY MTV-2205W, like other televisions, it is advisable to start repairing from inspection of external and internal elements and modules. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
In the case when the MTV-2205W does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module is probably defective in this case. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the converter. The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
A breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If the MYSTERY MTV-2205W TV does not have an image, but there is sound, the malfunction should be sure that the backlight power converter (inverter) is working properly. It is also necessary to check the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for excessive ESR. 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 they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
On the motherboard T.VST26.3B 10104, in the event of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its SPI Flash chips: MX25L8005; and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
We recommend the owners of the MTV-2205W TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!

 SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Main T.VST26.3B

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-2205W, Main: T.VST26.3B 10104, Panel: V216B1-L01

 The appearance of the MainBoard is shown in the figure below:
T.VST26.3B
T.VST26.3B can be used on TVs:
HYUNDAI H-LCDVD2200 (Panel LTM220MT05 010), HYUNDAI H-LCD2216 (Panel M216H1-L01), IZUMI TL15H603B (Panel LTA150XH-L06), IZUMI TL15H605B (Panel LTM150XH-L06), MYSTERY MTV-2225WD (Panel V216B1-L04 REV.C1), MYSTERY MTV-2205W (Panel V216B1-L01), MYSTERY MTV-1605W (Panel HT156WX1-100).
Main features of the MYSTERY MTV-2205W device:
Installed matrix (LCD panel) V216B1-L01.
The required supply voltage for all nodes of the TV MYSTERY MTV-2205W provides a switching power supply.
MainBoard - the main board (motherboard) is a T.VST26.3B module, using SPI Flash chips: MX25L8005; and others.
The TDQ-ATF27WT-F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V216B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 477.417x268.416 mm
Brightness: 400 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
MYSTERY MTV-2205W TV with V216B1-L01 LCD, 22 "(55 cm) diagonal of 16:10 format. Screen brightness of 300 cd / m² is provided by CCFL (EEFL) fluorescent lamps. Contrast as a ratio of maximum brightness to the minimum is 1000: 1. You can view images in high quality HD at a resolution of 1680x1050 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 happens in with andartah 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the acoustic system of sound 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, 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.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The V216B1-L01 panel of the MYSTERY MTV-2205W 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 06:11
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