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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 22 April 2020

REPAIR / SERVICING TV ELENBERG LVD-1902

Technical description and composition of the ELENBERG LVD-1902 TV, panel type and applicable modules. The composition of the modules.
ELENBERG
Model: LVD-1902
Chassis / Version: 3302CV5.3
Panel: M190MWW1-201 // T190PW01
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): 3678C V2.0
PWM Inverter: BIT3713
MOSFET Inverter: 4511GM
Power Supply (PSU): 2956C Ver 2.0 OUT: 16V
PWM Power: CM0765R
MainBoard: 3302CV5.3
IC MainBoard: FLI8125, FSAV330, AT49F040A (Flash), TPA3008 (Sound)
Tuner: M09WPP-1P-E TCL 071029 08E 07
Appearance
ELENBERG LVD-1902
General recommendations for repairing TV LCD
Possible malfunctions
- The ELENBERG LVD-1902 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
With such manifestations, a malfunction is likely to be detected in the 2956C power supply module. 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. PWM chip CM0765R can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 3302CV5.3 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements FLI8125, FSAV330, AT49F040A (Flash), TPA3008 (Sound). BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the tuner M09WPP-1P-E TCL 071029 08E 07, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention TV owners! Self-repair attempts by ELENBERG LVD-1902 are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    ELENBERG LVD-1902 Chassis

 The appearance of the MainBoard is shown in the figure below:
3302CV5.3
The appearance of the power supply
Main features of the ELENBERG LVD-1902 device:
Installed matrix (LCD panel) M190MWW1-201 or T190PW01.
The 3678C inverter is used to power the backlight, controlled by the BIT3713 PWM controller. As power elements of the inverter, keys of the type 4511GM are used.
The necessary supply voltages are generated for all nodes of the ELENBERG LVD-1902 television by the 2956C power supply module or its analogs using CM0765R microcircuits.
MainBoard - the main board (motherboard) is a 3302CV5.3 module, using FLI8125, FSAV330, AT49F040A (Flash), TPA3008 (Sound) microcircuits and others.
The tuner M09WPP-1P-E TCL 071029 08E 07 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: IVO
Model: M190MWW1-201
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 410.4x256.5 mm
Brightness: 300 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 06:18
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