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 CTV-2065

Technical description and composition of the ELENBERG CTV-2065 TV, panel type and applicable modules. The composition of the modules.
ELENBERG
Model: CTV-2065
Chassis / Version: KLC-2018QS
Panel: V201V1-T03
Inverter (backlight): INV0305 V1.01
PWM Inverter: BIT3106
Power Supply (PSU): LC-TM2018
PWM Power: ICE3DS01
MOSFET Power: 6N60
MainBoard: KLC-2018QS
IC MainBoard: TDA15021H1 / N1C80 MST518 TDA1517 24LC32
Tuner: AFT 1/3000 // AFT1 / 3100
Technical Specifications CTV-2065
ELENBERG CTV-2065
General recommendations for repairing TV LCD
Possible malfunctions
- The ELENBERG CTV-2065 TV does not turn on. The indicators on the front panel do not shine and do not blink, and the remote control and control buttons do not respond. There are no signs of operability.
The problem should be sought first in the LC-TM2018 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.
It should be remembered that during 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 mains fuse usually breaks.
The breakdown of Mos-Fet keys used in modern pulse sources is often caused by malfunctions of other elements, for example, power, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM ICE3DS01 may also cause a malfunction of the power switch of the converter and is checked by replacing it with a known good one.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or backlight elements of the display, or in the power of the lamps or inverter.
After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, the fuse and power switches for breakdown should be phoned in its converter, as well as the secondary windings of the transformers for an open.
If, when diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, then special care is required when working.
After their completion of repair work, it is necessary to restore the protection circuit for the further safe operation of the TV 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 KLC-2018QS motherboard should begin by checking the stabilizers and power converters needed to power all the circuit board microcircuits and the matrix. If necessary, update or replace the software (software). Board repair and replacement of chips like TDA15021H1, MST518, TDA1517, 24LC32 are carried out with the necessary equipment, and the corresponding element base.
Before replacing the AFT1 / 3100 tuner, if there is no tuning to the channels, first of all, it is necessary to check the software and the supply voltage at its terminals. You should also make sure that the tuner and processor can exchange data via the I2C bus using an oscilloscope.
Attention! For users and owners of LCD TVs CTV-2065, without the appropriate qualifications, knowledge and experience, we strongly do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.

 SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>     ELENBERG CTV-2065

 The appearance of the MainBoard KLC-2018QS is shown in the figure below:
KLC-2018QS
KLC-2018QS can be used in TVs:
ELENBERG CTV-2065 (Panel V201V1-T03 ), ELENBERG LTV-1521 (Panel HT150X02-100).
The appearance of the power supply
Main features of the ELENBERG CTV-2065 device:
Installed matrix (LCD panel) V201V1-T03.
The INV0305 inverter is used to power the backlight lamps, it is controlled by the BIT3106 PWM controller.
The necessary supply voltages for all nodes of the ELENBERG CTV-2065 TV are generated by the LC-TM2018 power module, or its analogs using ICE3DS01 microcircuits and 6N60 type power switches.
MainBoard - the main board (motherboard) is a KLC-2018QS module, using TDA15021H1 / N1C80 MST518 TDA1517 24LC32 chips and others.
Tuner AFT 1/3000 // AFT1 / 3100 provides reception of television programs and tuning to channels.
ELENBERG CTV-2065 TV with an LCD display, diagonal size 20 "4: 3 format. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 576i.
The power of the sound system 4 W (2x2 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),. An output for connecting headphones is provided. 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.
Overall dimensions: 596x457x200 mm.
Mass of the TV: 10.5 kg.
Attention! The ELENBERG CTV-2065 LCD TV screen 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 07:04
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