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-1603W

Technical description and composition of the MYSTERY MTV-1603W TV, panel type and applicable modules. The composition of the modules.
MYSTERY
Model: MTV-1603W
Chassis / Version: SPV7050-V02
Panel: LTN156AT02 LJ96-05080D
Power Supply (PSU): APS-L036151A-G
MainBoard: SPV7050-V02 T15.017050-02R
IC MainBoard: CPU: SPV7050P, EEPROM: 24LC32B, SPI Flash: T80-75HCP, Audio: TDA1517P
Tuner: CDT-6GPL28-00
Technical Specifications MTV-1603W
MYSTERY MTV-1603W
General recommendations for repairing TV LCD
It is advisable to start the repair of the MYSTERY MTV-1603w TV with an external examination of all its constituent elements, both internal electronic components and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for 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 hint in the assumptions about the causes and consequences of the malfunction.
In the absence of any signs of operability, when the MYSTERY MTV-1603w does not turn on and does not signal anything with the control lights on the panel, the power module is most likely faulty. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the MYSTERY MTV-1603w does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
In most cases, the diagnosis and repair of the inverter is difficult due to the organization of protection, which turns it off in emergency cases in order to avoid fires during short circuits or breaks in high voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
On the motherboard SPV7050-v02, in the event of a malfunction, you should first check the operation of all power supply stabilizers for microchips, CPU elements: SPV7050P, Audio Amp: TDA1517P, Tuner: CDT-6GPL28-00, EEPROM: 24LC32B and, if necessary, update the software (software).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.

 SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    MTV-1603w


 The appearance of the MainBoard SPV7050-V02 is shown in the figure below:
SPV7050-V02
SPV7050-V02 can be used in TVs:
MYSTERY MTV-1603W (Panel LTN156AT02 LJ96-05080D), MYSTERY MTV-1903W (Panel M185GW01 V.A).
The appearance of the power supply
Main features of the MYSTERY MTV-1603W device:
Installed matrix (LCD panel) LTN156AT02 LJ96-05080D.
The formation of the necessary supply voltages for all nodes of the MYSTERY MTV-1603W TV is carried out by the APS-L036151A-G power supply module, or its analogs.
MainBoard - the main board (motherboard) is an SPV7050-V02 module, using CPU chips: SPV7050P, EEPROM: 24LC32B, SPI Flash: T80-75HCP, Audio: TDA1517P and others.
The tuner CDT-6GPL28-00 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTN156AT02-W04
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Display Colors: 262K (6-bit)
Frequency: 60Hz
Lamp Type: WLED
Signal Interface: LVDS (1 ch, 6-bit)
The appearance of the MainBoard SPV7050-V02 is shown in the figure below:
SPV7050-V02
SPV7050-V02 can be used in TVs:
MYSTERY MTV-1603W (Panel LTN156AT02 LJ96-05080D), MYSTERY MTV-1903W (Panel M185GW01 V.A).
The appearance of the power supply
Main features of the MYSTERY MTV-1603W device:
Installed matrix (LCD panel) LTN156AT02 LJ96-05080D.
The formation of the necessary supply voltages for all nodes of the MYSTERY MTV-1603W TV is carried out by the APS-L036151A-G power supply module, or its analogs.
MainBoard - the main board (motherboard) is an SPV7050-V02 module, using CPU chips: SPV7050P, EEPROM: 24LC32B, SPI Flash: T80-75HCP, Audio: TDA1517P and others.
The tuner CDT-6GPL28-00 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTN156AT02-W04
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Display Colors: 262K (6-bit)
Frequency: 60Hz
Lamp Type: WLED
Signal Interface: LVDS (1 ch, 6-bit)
Posted By: FRANK at 04:15
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