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-2207W

Technical description and composition of the MYSTERY MTV-2207W TV, type of panel and applicable modules. The composition of the modules.
MYSTERY
Model: MTV-2207W
Chassis / Version: MSTV2408-ZC01-01
Panel: CLAA215FA05
Inverter (backlight): integrated into PSU
PWM Inverter: BIT3102B
MOSFET Inverter: AO4828 * 2
Power Supply (PSU): TV2201-ZC02-02 (C)
PWM Power: DM07652R
MOSFET Power: AO4804C, AO4435
MainBoard: MSTV2408-ZC01-01
IC MainBoard: SPI Flash: MX25l3206EM2i,
Tuner: F35WT-2A-E
Technical Specifications MTV-2207W
MYSTERY MTV-2207W
General recommendations for repairing TV LCD
MYSTERY MTV-2207W, like other televisions, it is advisable to start repairing from inspection of external and internal elements and modules. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
If the MTV-2207W TV does not turn on, does not make any sounds when it is turned on, and also no indicators light up or blink on the front panel, there is a high probability of a malfunction in the power supply module. In some cases, there may be a malfunction only in standby power. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
Sometimes the MYSTERY MTV-2207W TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit). All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Diagnostics and repair of the MSTV2408-ZC01-01 motherboard usually begins with a test of the performance of the stabilizers and power converters of the module chips. In some cases, a software update is required. Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the SPI Flash elements: MX25l3206EM2i; . BGA chip malfunctions are usually easy to detect by warming up.

We recommend the owners of the MTV-2207W TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-2207W, Main: MSTV2408-ZC01-01, Panel: CLAA215FA05


 The appearance of the MainBoard MSTV2408-ZC01-01 is shown in the figure below:
MSTV2408-ZC01-01
MSTV2408-ZC01-01 can be used in TVs:
MYSTERY MTV-1907W (Panel CLAA185WA09(FE58ZKMJ00)), MYSTERY MTV-2207W (Panel CLAA215FA05).
Main features of the MYSTERY MTV-2207W device:
Installed matrix (LCD panel) CLAA215FA05.
To power the backlight, a converter is used, combined with a power supply, controlled by a BIT3102B PWM controller. As power elements of the inverter, keys of the type AO4828 * 2 are used.
The necessary supply voltages for all nodes of the MYSTERY MTV-2207W TV are generated by the TV2201-ZC02-02 power module, or its analogs using microchips DM07652R and power switches of the type AO4804C, AO4435.
MainBoard - the main board (motherboard) is an MSTV2408-ZC01-01 module, using SPI Flash chips: MX25l3206EM2i, and others.
The F35WT-2A-E tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CPT
Model: CLAA215FA05
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Brightness: 200 cd / m²
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Frequency: 60Hz
Lamp Type: WLED
Signal Interface: LVDS (2 ch, 8-bit)
Voltage: 5.0V
MYSTERY MTV-2207W TV with CLAA215FA05 LCD display, diagonal size 22 "(56 cm) in 16: 9 format. 400 cd / m² screen brightness is provided by 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 st ndartah 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, component, SCART, RGB, VGA, HDMI. 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, 1280x1024.
The power consumed by the TV in the operating mode from the network is 65 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The CLAA215FA05 panel of the MYSTERY MTV-2207W 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 06:19
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