Technical description and composition of the ELENBERG LVD-2002 TV, type of panel and applicable modules. The composition of the modules.ELENBERG
Model: LVD-2002
Panel: A201SN02 V5
Inverter (backlight): TY-01 6 lamps
Power Supply (PSU): 2956C Ver2.0
PWM Power: CM0765R (6)
MainBoard: 3744C V1.7 C29888330
IC MainBoard: TPA3008D2 MSP3415G 88 V3 CD4052BM
Tuner: M90WPP-1P-E TCL080329
Specifications LVD-2002
ELENBERG LVD-2002
General recommendations for repairing TV LCD
Possible malfunctions
- The ELENBERG LVD-2002 TV does not turn on at all. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
Typically, with such manifestations, the defect is caused by faulty elements in the 2956C main power 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 power elements of the primary circuit, the mains 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 CM0765R (6). It is checked only by replacement with a known good one.
- 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.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 3744C 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - TPA3008D2 MSP3415G 88 V3 CD4052BM and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If you suspect a malfunction of the M90WPP-1P-E TCL080329 tuner, first of all, you need to verify the correctness of the software, as well as the presence of the required power supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
It should be remembered! Attempts to independently repair the ELENBERG LVD-2002 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!The appearance of the power supply
Main features of the ELENBERG LVD-2002 device:
Installed matrix (LCD panel) A201SN02 V5.
To power the backlight used inverter TY-01.
The necessary supply voltages for all nodes of the ELENBERG LVD-2002 television are generated by the 2956C power supply module or its analogs using CM0765R microcircuits (6).
MainBoard - the main board (motherboard) is a 3744C module, using TPA3008D2 MSP3415G 88 V3 CD4052BM chips and others.
The tuner M90WPP-1P-E TCL080329 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: A201SN02 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 800x600, SVGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare
Brightness: 450 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 11/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: TTL (1 ch, 8-bit), 50 pins
Voltage: 5.0V
ELENBERG LVD-2002 TV with an LCD display, diagonal size 20 "in 4: 3 format. The brightness of the screen is 450 cd / m² thanks to backlighting with CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 700: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 576i. Supported media file formats: JPEG. Stereo sound is realized by two built-in speakers. NICAM STEREO audio processing.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, VGA. 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.
Overall dimensions: 494x412x184 mm.
TV Weight: 9.5 kg.
Attention! The LCD TV screen ELENBERG LVD-2002 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!
