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 ELENBERG E39Q2510A

Technical description and composition of the ELENBERG E39Q2510A TV, panel type and applicable modules. The composition of the modules.
ELENBERG LED
Model: E39Q2510A
Panel: ECG390AH-LD1 (SN)
T-CON: T390HVN01.V0
LED driver (backlight): integrated into PSU
Power Supply (PSU): HS100D-1MF12
PWM Power: 2A1178, NCS1002A, NCP1271A
MainBoard: JUG7.820.1358
IC MainBoard: AT25DF321A, TPA3100D2, IT6633E-P
Tuner: R620D
Control: STV-LC1914W
Technical Specifications E39Q2510A
ELENBERG E39Q2510A
General repair guidelines for TV LCD LED
Possible malfunctions
- The ELENBERG E39Q2510A TV does not turn on and does not show any signs of turning on at all. There are no reactions to the control buttons or the remote control.
In the vast majority of such cases, a malfunction is detected in the HS100D-1MF12 power supply module. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary first of all to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) 2A1178, NCS1002A, NCP1271A. It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the JUG7.820.1358 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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - AT25DF321A, TPA3100D2, IT6633E-P with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the R620D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.

Repair MainBoard
The appearance of the MainBoard JUG7.820.1358 is shown in the figure below:
JUG7.820.1358
The appearance of the power supply
Main features of the ELENBERG E39Q2510A device:
Installed matrix (LED-panel) ECG390AH-LD1 (SN).
The matrix control uses the Timing Controller (T-CON) T390HVN01.V0.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the ELENBERG E39Q2510A TV are generated by the HS100D-1MF12 power module, or its analogs using 2A1178, NCS1002A, NCP1271A microcircuits.
MainBoard - the main board (motherboard) is a JUG7.820.1358 module, using chips AT25DF321A, TPA3100D2, IT6633E-P and others.
The R620D tuner provides TV reception and channel tuning.
Information from an alternative source:
ELENBERG E39Q2510A
Panel Type (Matrix): ECG390AH-LD1 (SN),
Motherboard: JUG7.820.1358, AT25DF321A, TPA3100D2, IT6633E-P, Tuner: R6200,
T-con: T390HVN01.V0
PSU: HS100D-1MF12, 2A1178, NCS1002A, 1271A

ELENBERG E39Q2510A TV with a 39 "(99 cm) diagonal LCD display in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. V The LED panels of this TV are equipped with edge LED backlighting - Edge LED.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD). The video or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, DivX, JPEG The stereo sound is realized by two built-in speakers, and NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), VGA, HDMI x2, USB x2. 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, 1360x768, 1920x1080.
Overall dimensions: 974x625x175 mm.
TV Weight: 13.1 kg.
Attention! The screen of the LED-TV ELENBERG E39Q2510A is its most expensive and most 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 06:03
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