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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Thursday 30 April 2020

REPAIR / SERVICING TV MYSTERY MTV-3217LW

Technical description and composition of the MYSTERY MTV-3217LW TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-3217LW
Chassis / Version: TP.VST59S.PB813
Panel: CX315DLEDM
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN510P
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536 (6 pin)
MainBoard: TP.VST59S.PB813
IC MainBoard: CPU: TSUMV59XUS; SPI Flash: GD25Q32B;
Tuner: R840
Technical Specifications MTV-3217LW
MYSTERY MTV-3217LW
General repair guidelines for TV LCD LED
Repair of the MYSTERY MTV-3217LW TV should begin with a careful external inspection of all its components and modules. Many visible changes in the state of the elements make it possible to determine the future direction of the troubleshooting. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs that are familiar to experienced repairmen.
In the case when the MTV-3217LW 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the MYSTERY MTV-3217LW TV does not have an image, but there is sound, a malfunction in the backlight circuits of the CX315DLEDM LED panel is likely.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
Repair or diagnostics of the TP.VST59S.PB813 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, you should update the software (software).
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - CPU: TSUMV59XUS; SPI Flash: GD25Q32B; . In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Attention to the owners! Attempts to self-repair the MYSTERY MTV-3217LW TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    TP.VST59S.PB813 

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-3217LW, Main: TP.VST59S.PB813, Panel: CX315DLEDM


 The appearance of MainBoard TP.VST59S.PB813 is shown in the figure below:
TP.VST59S.PB813
The TP.VST59S.PB813 motherboard is combined with a power module and is an independent device made on the basis of the TSUMV59Xxx multifunction processor. Repair of such a board must begin by checking the power batteries, as well as the operability of voltage converters and linear stabilizers, necessary to provide power to certain processor nodes, in particular: + 1.2V core power, built-in DDR + 1.8V memory and Stand- by 3.3V. The voltage of the LCD panel 5V or 12V, depending on the type of panel used, must be checked directly on the LVDS connector.
TP.VST59S.PB813 can be used in TVs:
MYSTERY MTV-3217LW (Panel CX315DLEDM), SHIVAKI STV-32LED6 (Panel HV320WX2-206), SUPRA STV-LC28500WL (Panel ST2751A01-3), TELEFUNKEN TF-LED32S2 (Panel LSC320AN02), TELEFUNKEN TF-LED39S11 (Panel T390HVN04.2 E39-9100).
Main features of the MYSTERY MTV-3217LW device:
Installed matrix (LED-panel) CX315DLEDM.
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-5.
To power the backlight LEDs, a converter is used, combined with the TP.VST59S.PB813 main board, controlled by the SN510P PWM controller.
The power module is combined with the MainBoard and is made according to the scheme of a flyback AC / DC voltage converter using LD7536 chips (6 pin).
MainBoard - the main board (motherboard) is a module TP.VST59S.PB813, using CPU chips: TSUMV59XUS; SPI Flash: GD25Q32B; and others.
The R840 tuner provides TV reception and channel tuning.
TV MYSTERY MTV-3217LW with LCD display CX315DLEDM, diagonal size 32 "(81 cm) 16: 9 format. The required brightness of the screen 400 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 2000: 1. Edge LED backlighting is realized 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 . Max PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, MPEG4, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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. 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 90 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The CX315DLEDM panel of the MYSTERY MTV-3217LW 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 03:21
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