Technical description and composition of the BBK LT2209S TV, panel type and applicable modules. The composition of the modules.BBK
Model: LT2209S
Panel: PV220WTVM
T-CON: T-CON: M220Z1-L01-X + C; CM2709, FP3128, i7724DA, AT08A
Inverter (backlight): integrated into PSU
PWM Inverter: TL494C
MOSFET Inverter: 4511GD
Power Supply (PSU): 200-001-XXXXTLTX-AH
PWM Power: LD7575PS (8pin)
MOSFET Power: SB2060FCT, SB20200FCT, P10NK60ZFP, T50N03RG
MainBoard: 200-100-DK1694P-BH // 200-000-MS97885-S3H
IC MainBoard: MST97885LD, AT24C32AN, 25L4005AMC, EM638165TS-66, TDA1517P
Tuner: JS-6H2 / 121
Control: suitable from LT1904S S0716100
Technical Specifications LT2209S
BBK LT2209S
General recommendations for repairing TV LCD
Possible manifestations of defects
- BBK LT2209S 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.
With such manifestations, the power module 200-001-XXXXTLTX-AH usually fails. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of power switches (SB2060FCT, SB20200FCT, P10NK60ZFP, T50N03RG) of 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 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 key may be PWM (PWM) LD7575PS (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, the channels are switched. In some cases, the image appears when you turn on and immediately 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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 when working, 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 200-100-DK1694P-BH 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). When repairing an MB board, you need to check its components MST97885LD, AT24C32AN, 25L4005AMC, EM638165TS-66, TDA1517P. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
The malfunction of the tuner JS-6H2 / 121 is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, remind users! Attempts to self-repair a BBK LT2209S TV without the appropriate qualifications and the necessary experience can lead to its complete unrepairability!
Repair MainBoard
The appearance of the MainBoard 200-100-DK1694P-BH is shown in the figure below:
200-100-DK1694P-BH
200-100-DK1694P-BH can be used in TVs:
BBK LT1504S (Panel SVA150XG04TB), BBK LT2209S (Panel PV220WTVM).
The appearance of the power supply
Main features of the BBK LT2209S device:
Installed matrix (LCD-panel) PV220WTVM.
The matrix control uses the Timing Controller (T-CON) T-CON: M220Z1-L01-X + C ;.
To power the backlight, a converter is used, combined with a power supply, controlled by a TL494C PWM controller. As power elements of the inverter, keys of the type 4511GD are used.
The necessary supply voltages for all nodes of the TV BBK LT2209S are generated by the power module 200-001-XXXXTLTX-AH, or its analogs using microcircuits LD7575PS (8pin) and power switches of the type SB2060FCT, SB20200FCT, P10NK60ZFP, T50N03RG.
MainBoard - the main board (motherboard) is a 200-100-DK1694P-BH module, using microcircuits MST97885LD, AT24C32AN, 25L4005AMC, EM638165TS-66, TDA1517P and others.
The JS-6H2 / 121 tuner provides TV reception and channel tuning.
Information from an alternative source:
BBK LT2209S
Panel Type (Matrix): PV220WTVM C31H
Motherboard:200-000-MS97885-S3H, EM638165TS-6G, 24C32AI, 24C02, 25L4005AMC, WN8521HCGED, CM2021-00TR, TDA1517P, Tuner: JS-6H2/12I
T-con:M220Z1-L01-X+C, CM2709, FP3128, i7724DA, AT08A
PSU & Invertor: 200-001-XXXXTLTX-AH VERSION:A, LD7575PS, TL494C, 4511GD x2, P10NK60ZFP, T50N03RG, P3003EDG, SB2060FCT, SB20200FCT
Brand: BBK, Model: LT2209S.
Shortly from the TV: LCD, 720p HD, diagonal 22 "(55 cm), there is HDMI.
The composition uses MainBoard 200-100-DK1694P-BH, or 200-000-MS97885-S3H and LCD panel (matrix) PV220WTVM.
Power Supply Unit (PSU) 200-001-XXXXTLTX-AH Power Supply.
BBK LT2209S LCD TV with PV220WTVM LCD, diagonal size 22 "(55 cm) 16:10 format. 400 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 700: 1. It is possible to view images in high quality HD at a resolution of 1680x1050 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standard tach 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3.
The power of the acoustic system of sound 6 W (2x3W) 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 x3, S-Video, component, SCART, RGB, VGA, HDMI. 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, 1280x1024, 1360x768.
The power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: 529x449x185 mm.
TV Weight: 5.8 kg.
Attention! The BBK LT2209S PV220WTVM LCD TV panel is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
