Technical description and composition of the TV ELENBERG LVD-2603, type of panel and applicable modules. The composition of the modules.ELENBERG
Model: LVD-2603 LVD-2602
Chassis / Version: 3827C
Panel: V260B1-L03 // V260B1-L07 Rev. C3
T-CON: V260B1-C01
Inverter (backlight): TT70038.50 // 1260B1-12E
PWM Inverter: 0Z964
Power Supply (PSU): MLT-268A MPB-0632 PCB 5100C Ver1.6.
PWM Power: FAN7602, FAN7529 (PFC)
MOSFET Power: 18N50, 8N80, 7V80C
MainBoard: 3827C_V3.0
IC MainBoard: MT8200ALE, KH29LV160CB1, 24C16, M12L64164A, MT8293AE, TDA9886TS, TDA8932T
Tuner: TDQ-6PD / T124CWADC
Technical Specifications LVD-3203
ELENBERG LVD-2603
General recommendations for repairing TV LCD
Possible malfunctions
- ELENBERG LVD-2603 does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
With such manifestations, a failure is likely to be detected in the MLT-268A power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the health of the power switches (18N50, 8N80, 7V80C) 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.
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) FAN7602, FAN7529 (PFC). It is checked only by replacement 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.
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. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, 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 turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 3827C_V3.0 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Verification or replacement of elements MT8200ALE, KH29LV160CB1, 24C16, M12L64164A, MT8293AE, TDA9886TS, TDA8932T requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the TDQ-6PD / T124CWADC tuner, 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! Users and owners of LVD-2603 TVs who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> ELENBERG LVD-3203, LTV-3203
According to the conditions of compliance with modern world standards for household switching power supplies, the MLT-268A module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7529 PWM controller. The reactance of the electrolytic capacitor of the line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
Main features of the ELENBERG LVD-2603 device:
Installed matrix (LCD panel) V260B1-L03 or V260B1-L07 Rev. C3.
The matrix control uses the Timing Controller (T-CON) V260B1-C01.
To power the backlight, the inverter TT70038.50 is used, it is controlled by the PWM controller 0Z964.
The necessary supply voltages for all nodes of the ELENBERG LVD-2603 television are generated by the MLT-268A power supply module or its analogs using FAN7602, FAN7529 (PFC) microchips and power switches of the 18N50, 8N80, 7V80C type.
MainBoard - the main board (motherboard) is a 3827C_V3.0 module, using chips MT8200ALE, KH29LV160CB1, 24C16, M12L64164A, MT8293AE, TDA9886TS, TDA8932T and others.
The TDQ-6PD / T124CWADC tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
ELENBERG LVD-3203 TV with a 32 "(81 cm) diagonal LCD display in 16: 9 format. You can view high-definition images at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard. The input high-frequency or video signal may can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, VideoCD, SVCD, Picture CD, Jpeg.
The power of the sound system 12 W (2x6 W) provides 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), RGB, HDMI. 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, 800x600, 1024x768, 1360x768.
Dimensions: With stand 803x630x280 mm, Without stand 515x357x62 mm.
TV Weight: 25 kg.
Attention! The LCD TV screen ELENBERG LVD-3203 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!
