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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Wednesday, 22 April 2020

REPAIR / SERVICING TV DIGITAL DLE-1623

Technical description and composition of the DIGITAL DLE-1623 TV, type of panel and applicable modules. The composition of the modules.
DIGITAL LED
Model: DLE-1623
Chassis / Version: LA.M182VG.B3
Panel: LTN156AT05
Power Supply (PSU): Adapter 12V
MainBoard: LA.M182VG.B3 1352
IC MainBoard: MST6E182VG-LF-TZ, 25Q32BVS1G, YD1517P
Tuner: TNF903SHR-BF-1
Technical Specifications DLE-1623
DIGITAL DLE-1623
General repair guidelines for TV LCD LED
Possible malfunctions
- The DIGITAL DLE-1623 TV does not turn on. There are no signs of operability. The indicators on the front panel do not shine and do not blink, and the remote control and control buttons do not respond.
With such manifestations, in most cases, the power module is faulty. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the main fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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 most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. 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 check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the 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 indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the TSUX6V5.1B 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). When repairing an MB board, you need to check its components TSUMV26KU-LF, EON25F40, 24C32, SA7454,. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
AFT7 / W110G tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention TV owners! Attempts to self-repair DIGITAL DLE-1623 are not recommended by the manufacturer and can lead to serious negative consequences!
LED backlight, 16-inch screen diagonal, HD Ready 1366x768 screen resolution, Brightness 400 cd / m2, Contrast ratio 15,000: 1, Matrix response time 4 ms.
There is a variant DLE-1623 with a panel LTN156AT17, lanes TSUX6V5.1B, tuner AFT7 / W110G, the composition of the lanes TSUMV26KU-LF, EON25F40, 24C32, SA7454 ...
Repair MainBoard
The appearance of MainBoard LA.M182VG.B3 is shown in the figure below:
LA.M182VG.B3
Main features of the DIGITAL DLE-1623 device:
Installed matrix (LED-panel) LTN156AT05.
To power all the internal components of the DIGITAL DLE-1623 TV, an external adapter 12V type source is used.
MainBoard - the main board (motherboard) is a LA.M182VG.B3 module, using microchips MST6E182VG-LF-TZ, 25Q32BVS1G, YD1517P and others.
The TNF903SHR-BF-1 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTN156AT05-J08
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
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 04:38
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