Technical description and composition of the BBK LD1506SI TV, type of panel and applicable modules. The composition of the modules.BBK
Model: LD1506SI
Panel: HT150XO2-100
Inverter (backlight): 5inv203-1 20060801
PWM Inverter: MP1008ES (16) 4822 BE601B (8) MPS 0717 view cond 3 leg
Power Supply (PSU): adapter AK083 12v 4,5a 54w there is a circuit
PWM Power: NCP1207
MainBoard: MAIN_PCB_MST518VA
IC MainBoard: MST518VA, STV8216, TDA7266P, 79E632A40PN
Tuner: JS-6B2 / 121
Control: LT115
Technical Specifications LD1506SI
BBK LD1506SI
General recommendations for repairing TV LCD
Possible malfunctions
- The BBK LD1506SI TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In such cases, the adapter power supply is usually faulty.
The owner of a TV can purchase an external power adapter such as adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. 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 elements of the primary circuit, the mains 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. The PWM chip NCP1207 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of 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 turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the MAIN_PCB 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 - MST518VA, STV8216, TDA7266P, 79E632A40PN with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner JS-6B2 / 121. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
TV users and owners must remember that attempts to self-repair a BBK LD1506SI TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
1. Service Manual with Schematic Diagram 133 pages 2006 on model LD1506SI.
2. Service Manual with Schematic Diagram 168 pages 2006 on the model LD2006SI-2, LD1506SI-2, LD1506SI-3, LT1500S-2, LT1500S-3, LT2000S, LD1906SI, LT1900S.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LD1506SI
Main features of the BBK LD1506SI device:Installed matrix (LCD panel) HT150XO2-100.
A 5inv203-1 inverter is used to power the backlight, it is controlled by the PWM controller MP1008ES (16) 4822 BE601B (8) MPS 0717 viewing cond 3 leg.
To power all the internal components of the BBK LD1506SI TV, an external adapter type AK083 12v 4,5a 54w is used; there is a circuit using NCP1207 microcircuits.
MainBoard - the main board (motherboard) is a module MAIN_PCB_MST518VA, using microchips MST518VA, STV8216, TDA7266P, 79E632A40PN and others.
The JS-6B2 / 121 tuner provides television reception and channel tuning.
BBK LD1506SI LCD TV with HT150XO2-100 LCD, 15 "diagonal size, 4: 3 format. 250 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 450: 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 standards 480i, 480p, 576i, 576p. Supported media file formats: MP3, WMA, MPEG4, VideoCD, SVCD, Picture CD, JPEG.
The power of the sound system 6 W (2x3 W) provide 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), AV, USB. An output for connecting headphones is provided.
The power consumed by the TV in the operating mode from the network is 54 watts.
Overall dimensions: With stand 738x495x220 mm, Without stand 439x296x73 mm.
Attention! The BB1 LD1506SI LCD TV panel HT150XO2-100 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!