Technical description and composition of the ELENBERG CTV-1540 TV, panel type and applicable modules. The composition of the modules.ELENBERG
Model: CTV-1540
Chassis / Version: KLC-1508QS
Panel: SVA150XG04TB
Inverter (backlight): Inverter_CCFL_2lamp
Power Supply (PSU): Adapter 24V 4A
MainBoard: KLC-1508QS REV-02 35009096 KLC1508QS-G
IC MainBoard: TDA15021H1 / N1C80, 24C32, MST518, AFT1 / 3100, TDA1517
Tuner: AFT1 / 3100
Technical Specifications CTV-1540
ELENBERG CTV-1540
General recommendations for repairing TV LCD
Possible malfunctions
- The ELENBERG CTV-1540 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.
In such cases, the fault should be sought first in the Adapter power module.
This TV model is equipped with an external power adapter type Adapter 24V 4A, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is some sense in opening it and eliminating simple typical defects typical of IIPS. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches 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). 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 KLC-1508QS 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TDA15021H1 / N1C80, 24C32, MST518, AFT1 / 3100, TDA1517. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the AFT1 / 3100 tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners and users of the ELENBERG CTV-1540 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> ELENBERG CTV-1540
Main features of the ELENBERG CTV-1540 device:
Installed matrix (LCD panel) SVA150XG04TB.
Inverter_CCFL_2lamp is used to power the backlight.
To power all internal components of the ELENBERG CTV-1540 TV, an external adapter type 24V 4A is used.
MainBoard - the main board (motherboard) is a KLC-1508QS module, using TDA15021H1 / N1C80, 24C32, MST518, AFT1 / 3100, TDA1517 and others.
The AFT1 / 3100 tuner provides television reception and channel tuning.
Information from an alternative source:
ELENBERG CTV-1540
Panel Type (Matrix): SVA150XG04TB,
Motherboard: KLC-1508QS, TDA15021H1 / N1C80, 24C32, MST518, TDA1517, Tuner-AFT1 / 3100,
PSU: External, + 12V, 4A,
Additional technical information about the panel:
Brand: SVA-NEC
Model: SVA150XG04TB
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Brightness: 250 cd / m²
Contrast Ratio: 450: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 60%
Response Time: 3/9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
ELENBERG CTV-1540 TV with an LCD display, diagonal size 15 "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. Stereo sound implemented by two built-in speakers, NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, VGA. 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.
Overall dimensions: With stand 515x361x161 mm, Without stand 515x357x62 mm.
Attention! The ELENBERG CTV-1540 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!
