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 LVD-1502

Technical description and composition of the ELENBERG LVD-1502 TV, type of panel and applicable modules. The composition of the modules.
Elenberg led
Model: LVD-1502
Chassis / Version: 2973C V5.0
Panel: 1024x768
LED backlight: 2 Lamp CCFL
LED driver (backlight): MINV15-07SVA1B01
PWM LED driver: BIT3193G
MOSFET LED driver: AP4511
Trans LED driver: NIA19LES018
Power Supply (PSU): 2956C VER 2.0
PWM Power: CM0765R
MainBoard: 2973C V5.0
IC MainBoard: MSP3415GB, FLI8125-LF, AT24C32AN, TDA1517P
Tuner: M09WPP-1P-E TCL 080329 14E 01
Control: Remote: RC-6024
Technical Specifications LVD-1502
ELENBERG LVD-1502
General repair guidelines for TV LCD LED
Repair of any electronic device, in particular Elenberg with the 2973C V5.0 chassis, is advisable to start with an external examination of the internal and external elements. Visible damage to elements can often indicate the direction of a defect search.
If the LVD-1502 TV does not turn on at all and does not make any sounds when it is turned on, no indicators light up or blink on the front panel - there is a high probability of a malfunction in the power module, which is designed as a separate device and is included in the TV set. First of all, in the power supply unit, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, a breakdown of the power switch is possible, which can be integrated with the PWM controller. In this case, you should check the rectifier bridge diodes, as well as the electrolytic capacitor of the rectifier filter.
Typically, power switches in switching power supplies are reliable enough and rarely fail for no reason to look for when checking other components of the circuit. The PWM controller chip is checked by replacing with a known-good one.
If, when you turn on the TV, the image is missing, or appears and immediately disappears, but the sound is there and other functions work, there is a possibility of a malfunction of the LED driver (power converter for the backlight). In such cases, it is necessary to check the lamps, the LED driver and the general power supply module, in which you should pay attention to the electrolytic capacitors of the rectifier filter supplying the LED driver.
When diagnosing a malfunction of the LED backlight driver with disabled protection, special care must be taken, there is a risk of failure of the power elements of the LED driver. After the diagnosis, it is imperative to restore the protection circuits for the LED driver to operate normally.
If the Main Board 2973C V5.0 is faulty, you should first check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In cases of complex MB repairs and with the necessary skills and equipment, sometimes it may be necessary to replace microchips.
Attention to the owners! Attempts to self-repair TVs without appropriate qualifications are not recommended by the manufacturer and can lead to serious negative consequences up to complete non-repairability!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Elenberg LVD-1502 Chassis 2973C V5.0

 Main features of the ELENBERG LVD-1502 device:
Installed matrix (LED-panel) 1024x768.
The LED driver MINV15-07SVA1B01 is used to power the backlight LEDs, it is controlled by the BIT3193G PWM controller. The NIA19LES018 transformer is installed in the LED driver converter. As power elements of the LED driver, keys of the AP4511 type are used.
The necessary supply voltages for all nodes of the ELENBERG LVD-1502 television are generated by the 2956C power supply module or its analogs using CM0765R microcircuits.
MainBoard - the main board (motherboard) is a 2973C module, using microchips MSP3415GB, FLI8125-LF, AT24C32AN, TDA1517P and others.
The tuner M09WPP-1P-E TCL 080329 14E 01 provides the reception of television programs and tuning to channels.
ELENBERG LVD-1502 TV with LCD, diagonal size 15 "4: 3 format. The brightness of the screen 250 cd / m² is provided by backlight fluorescent lamps CCFL (EEFL). Contrast, as the ratio of maximum brightness to minimum, is 450: 1. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 576i. Supported media file formats: MP3, VideoCD, SVCD, JPEG.
The power of the acoustic system of sound 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, S-Video. An output for connecting headphones is provided.
Overall dimensions: With stand 515x361x161 mm, Without stand 515x357x62 mm.
Attention! The LCD TV screen ELENBERG LVD-1502 is its most expensive and most fragile component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 06:13
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