Technical description and composition of the ELENBERG LTV-1521 TV, panel type and applicable modules. The composition of the modules.ELENBERG
Model: LTV-1521
Panel: HT150X02-100
Inverter (backlight): JSI-150206 I0060909 V1.04
PWM Inverter: TL494C (16)
MOSFET Inverter: 9930GM (8)
Trans Inverter: HVT-039
Power Supply (PSU): JSI-150206 I0060909 V1.04
PWM Power: SG5841SZ (8)
MOSFET Power: FQPF5N60
MainBoard: KLC-2018QS // KLC-1521QS (KL1521QS-BOE)
IC MainBoard: MST518-LF, TDA15021H1 / N1C80, TDA1517
Tuner: AFT1 / 3100G
Control: ELENBERG
Technical Specifications LTV-1521
ELENBERG LTV-1521
General recommendations for repairing TV LCD
Possible malfunctions
- The ELENBERG LTV-1521 TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
With such manifestations, in most cases, the JSI-150206 power module is faulty. It is necessary to measure its secondary output voltages, and in case of their absence, check the operability of the power switches (FQPF5N60) 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip SG5841SZ (8) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned 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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the KL1521QS-BOE 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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MST518-LF TDA15021H1 / N1C80 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the AFT1 / 3100G tuner 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.
It should be remembered! Attempts to independently repair the ELENBERG LTV-1521 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!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> ELENBERG LTV-1521
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).
Main features of the ELENBERG LTV-1521 device:
Installed matrix (LCD panel) HT150X02-100.
To power the backlight, the JSI-150206 inverter is used, it is controlled by the TL494C PWM controller (16). A transformer HVT-039 is installed in the inverter converter. Keys of the type 9930GM (8) are used as power elements of the inverter.
The necessary supply voltages for all nodes of the ELENBERG LTV-1521 television are generated by the JSI-150206 power module or its analogs using SG5841SZ microcircuits (8) and power switches of the FQPF5N60 type.
MainBoard - the main board (motherboard) is a KLC-2018QS module, using microchips MST518-LF, TDA15021H1 / N1C80, TDA1517 and others.
The AFT1 / 3100G tuner provides television reception and channel tuning.
Information from an alternative source:
ELENBERG LTV-1521
Panel Type (Matrix): HT150X02-100
Motherboard: KLC-2018QS, TDA15021H1 / N1C80, MST518-LF, 24LS32A, TDA1517, SN74CBT3257 (CU257), MP1410ES, 9435A
PSU & Invertor: JSI-150206, SG5841SZ, TL494C, AP9930GM, HTV-039
Service: In operating mode, on the remote control, press the menu, then quickly press the RECALL button 5 times
Additional technical information about the panel:
Brand: BOE
Model: HT150X02-100
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
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 60%
Response Time: 2/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
In some cases, before calling the repair service, you should make sure that your TV is really defective.
If the ELENBERG LTV-1521 does not turn on or turns off periodically, it is useful to check the sockets and extension cords at the points where the TV is connected to the network, for example, using a regular table lamp.
If the ELENBERG LTV-1521 does not respond to the remote, but the control buttons on the panel work, there is a certain probability of a malfunction of the remote (the remote does not work). It is advisable to check or replace the batteries in it.
If, when watching broadcasting programs, a notification of the absence of a signal appears (no signal), you should make sure that the TV is in the TV reception mode (digital / analog), or check the antenna or cable equipment.
You can check the operation of the TV from other external devices.
If there is no sound only when watching analog television programs, you should check the sound system in the settings. For Russia, D / K (6.5 MHz), for European countries B / G (5.5 MHz). In modern TVs, a region is usually chosen to set the color and sound standards - for Russia, “East Europe” (Eastern Europe).
If the ELENBERG LTV-1521 hangs during operation, does not respond to either the remote control or the buttons on the control panel, rebooting sometimes helps. To do this, you must completely disconnect the TV from the network by pulling the plug from the outlet, and turn it back on after 10-15 seconds.
