Technical description and composition of the BBK LD2006K TV, panel type and applicable modules. The composition of the modules.BBK
Model: LD2006K
Chassis / Version: 21901-2
Panel: V201V1-T03 Rev. C4
T-CON: V201V1-X3
Inverter (backlight): 5INV603-5
PWM Inverter: MP1048EM
MOSFET Inverter: AO4822
Power Supply (PSU): 52006-5 BCK32055
PWM Power: NCP1377B (PWM flyback 8pin)
MOSFET Power: 11N80C3
MainBoard: 21901-2
IC MainBoard: STV8216, MST718, 24C32AN, HEF4094BT, MT1389FE, HY57V641620FTP-7, EN29LV160AB, A5954FP
Tuner: JS-6H2 / L121
Control: LT115; LT121
Technical Specifications LD2006K
BBK LD2006K
General recommendations for repairing TV LCD
Possible manifestations of defects
- The BBK LD2006K TV does not turn on, does not respond to the remote control and the control panel buttons, does not blink with any indicators.
Most likely in this case, the main switching power supply (IIPS) 52006-5 is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is first necessary to check the power switches (11N80C3) and rectifier diodes for a possible partial or complete breakdown.
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.
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 an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may also be PWM (PWM) NCP1377B (PWM flyback 8pin). It is checked only by replacement with a known good one.
- 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 a power supply module, or by inverter defects, as well as by 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.
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 21901-2 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - STV8216, MST718, 24C32AN, HEF4094BT, MT1389FE, HY57V641620FTP-7, EN29LV160AB, A5954FP. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
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-6H2 / L121. 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LT1500S-2, LT1500S-3, LD1506SI-2, LD1506SI-3, LT1900S, LD1906SI, LT2000S, LD2006SI-2
The appearance of MainBoard 21901-2 is shown in the figure below:21901-2
21901-2 can be used in TVs:
BBK LD1516K (Panel SVA156WX1-01TB), BBK LD1906SI (Panel SVA190WX02TB), BBK LD2006K (Panel V201V1-T03 Rev.C4).
The appearance of the power supply
Main features of the BBK LD2006K device:
Installed matrix (LCD panel) V201V1-T03 Rev. C4.
The matrix control uses the Timing Controller (T-CON) V201V1-X3.
A 5INV603-5 inverter is used to power the backlight, controlled by the MP1048EM PWM controller. As power elements of the inverter, keys of the type AO4822 are used.
The required supply voltages for all nodes of the BBK LD2006K TV are generated by the 52006-5 power supply module or its analogs using NCP1377B microcircuits (PWM flyback 8pin) and power switches of the 11N80C3 type.
MainBoard - the main board (motherboard) is a module 21901-2, using microchips STV8216, MST718, 24C32AN, HEF4094BT, MT1389FE, HY57V641620FTP-7, EN29LV160AB, A5954FP and others.
The tuner JS-6H2 / L121 provides the reception of television programs and tuning to channels.
Information from an alternative source:
BBK LD2006K (TV / DVD); BBK LD2006SI, LD1916K
Panel Type (Matrix): V201V1-T03 Rev. C4; A201SN02 V.5; M190A1-L07 Rev. C2
T-con: V201V1-X3
Motherboard: 21901-2; 21903-7; 21901-4, STV8216 (? - under the radiator, infa from the manual), MST718 (? - under the radiator, infa from the manual), 24C32AN, HEF4094BT, MT1389FE, HY57V641620FTP-7, EN29LV160AB, FM24C16, A5954FP, Tuner: JS-6 T121
PSU: 52006-5, NCP1377B & 11N80C3
Invertor: 5INV603-5; 5INV403-5, MP1048EM, AO4822 x2
Remote control: LT115; LT121, DIAGRAM BBK LD-2006
Additional technical information about the panel:
Brand: CMO
Model: V201V1-T03
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare
Brightness: 500 cd / m²
Contrast Ratio: 600: 1
Display Colors: 262K (6-bit), CIE1931 75%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: TTL (1 ch, 6-bit), 50 pins
Voltage: 5.0V (VCC)
BBK LD2006K LCD TV with V201V1-T03 LCD, 20 "diagonal size, 4: 3 format. 450 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 800: 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. 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, audio x2, component, SCART, RGB, USB x2. An output for connecting headphones is provided.
The power consumed by the TV in the operating mode from the network is 65 watts.
Overall dimensions: 620x450x202 mm.
Mass of the TV: 8.15 kg.
Attention! The BB201 LD2006K LCD panel V201V1-T03 Rev. C4 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
