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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Tuesday 28 April 2020

REPAIR / SERVICING TV MYSTERY MTV-1614LW

Technical description and composition of the MYSTERY MTV-1614LW TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-1614LW
Chassis / Version: V1K11
Panel: CLAA156W811A
LED driver (backlight): TV1601-ZC02-01 303C1601061
PWM LED driver: MP1482DS
MOSFET LED driver: AO4435, AO4468
Power Supply (PSU): Adapter 12V
MainBoard: MSTV2401-ZC01-01 303C2401072
IC MainBoard: CPU: MST6E181VS-LF-Z1, SDRAM: H5DU2562GTR-E3C, SPI FLASH: S25FL032KIF, SOUND: YD1517P, TUNER: F33WT-3DDR-E
Tuner: F33WT-3DDR-E
Control: IR TV1631-ZC25-01 (B) 303C1631232
Technical Specifications MTV-1614LW
MYSTERY MTV-1614LW
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The MYSTERY MTV-1614LW TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
Often in such cases, the Adapter power module is faulty.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. 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 diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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 MSTV2401-ZC01-01 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). Board repair and replacement of CPU chips: MST6E181VS-LF-Z1, SDRAM: H5DU2562GTR-E3C, SPI FLASH: S25FL032KIF, SOUND: YD1517P, TUNER: F33WT-3DDR-E are made with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner F33WT-3DDR-E may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. You also need to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of the MYSTERY MTV-1614LW TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    MSTV2401-ZC01-01 (CPU: MST6E181VS)


MYSTERY MTV-1614LW Version - Panel: N156BGE-L21 Rev. C1, MainBoard: MSTV2408-ZC01-01.
CPU: BGA, SPI Flash: GD25Q32, Tuner: F35WT-2A-E, Inverter: TV1601-ZC02-01 (A).


FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-1614LW, Main: MSTV2408-ZC01-01, Panel: N156BGE-L21


The appearance of the MainBoard is shown in the figure below:
MSTV2401-ZC01-01
MSTV2401-ZC01-01 can be used in TVs:
MYSTERY MTV-1611LW (Panel N156BGE-L21 Rev. C1 (BT156GW01 V.4)), MYSTERY MTV-1614LW (Panel CLAA156W811A).
Main features of the MYSTERY MTV-1614LW device:
Installed matrix (LED-panel) CLAA156W811A.
The LED driver TV1601-ZC02-01 is used to power the backlight LEDs, it is controlled by the MP1482DS PWM controller. As the power elements of the LED driver, keys of the type AO4435, AO4468 are used.
To power all the internal components of the MYSTERY MTV-1614LW TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is an MSTV2401-ZC01-01 module, using CPU chips: MST6E181VS-LF-Z1, SDRAM: H5DU2562GTR-E3C, SPI FLASH: S25FL032KIF, SOUND: YD1517P, TUNER: F33WT-3D and others.
The F33WT-3DDR-E tuner provides TV reception and channel tuning.
The MYSTERY MTV-1614LW TV with CLAA156W811A LCD, 16 "(41 cm) diagonal size, 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. Edge LED backlighting is implemented in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems . Emah PAL, SECAM Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p Supported multimedia file formats:. MP3, MPEG4, JPEG.
The power of the sound system 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, VGA, HDMI x2, USB. 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, 1360x768.
The power consumed by the TV in the operating mode from the network is 36 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The CLAA156W811A panel of the MYSTERY MTV-1614LW LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
Posted By: FRANK at 05:40
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