Technical description and composition of the ELENBERG LVD-3203 TV, type of panel and applicable modules. The composition of the modules.ELENBERG
Model: LVD-3203
Chassis / Version: 3827C_V1.3
Panel: V315B1-L01
T-CON: V315B1-C01
Inverter (backlight): I315B1-16A
PWM Inverter: OZ964GN
MOSFET Inverter: AO4614
Power Supply (PSU): MLT-268A - MPB-0632C, 5100C
PWM Power: FAN7529 (PFC), FAN7602
MainBoard: 2713CO01 3827C
IC MainBoard: MT8200 MT8293 ATMEGA8L FSAV330 TDA9886 FSAV433 CE2816 / CE2836 TDA8932
Tuner: 8TUN1
Technical Specifications LVD-3203
ELENBERG LVD-3203
General recommendations for repairing TV LCD
Possible manifestations of defects
- ELENBERG LVD-3203 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the MLT-268A power supply is usually faulty. It is necessary to measure the output voltages in the secondary circuits, 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.
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 key can be PWM (PWM) FAN7529 (PFC), FAN7602. 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. 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.
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 2713CO01 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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - MT8200 MT8293 ATMEGA8L FSAV330 TDA9886 FSAV433 CE2816 / CE2836 TDA8932. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the tuner 8TUN1 may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of the ELENBERG LVD-3203 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> ELENBERG LVD-3203, LTV-3203
The MLT-268A power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC assembly is a Step-Up Converter based on the FAN7529 PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.Main features of the ELENBERG LVD-3203 device:
Installed matrix (LCD panel) V315B1-L01.
The matrix control uses the Timing Controller (T-CON) V315B1-C01.
To power the backlight, an inverter I315B1-16A is used, it is controlled by the PWM controller OZ964GN. As power elements of the inverter, keys of the type AO4614 are used.
The necessary supply voltages for all nodes of the ELENBERG LVD-3203 television are generated by the MLT-268A power supply module or its analogs using FAN7529 (PFC), FAN7602 microcircuits.
MainBoard - the main board (motherboard) is a module 2713CO01, using chips MT8200 MT8293 ATMEGA8L FSAV330 TDA9886 FSAV433 CE2816 / CE2836 TDA8932 and others.
The 8TUN1 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V315B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
