Technical description and composition of the BBK LT3217S TV, panel type and applicable modules. The composition of the modules.BBK
Model: LT3217S
Panel: AX080D002F
T-CON: MDK336V-0N; TCON102A-F, 24C64, BUF12800, BD8161
Inverter (backlight): HIU-812-S, HIU-812-M
PWM Inverter: BD9897FS
MOSFET Inverter: FDD8447L
Power Supply (PSU): RSAG7.820.1032 / ROH VER.H
PWM Power: NCP1207A
MOSFET Power: N80C, 17A06
MainBoard: RSAG7.820.1269 / ROH VER.C
IC MainBoard: MST9E19B, A25L40PUO, 24C32AN, 24C08, AP1520, 4558CM, TDA9886TS, TDA7266SA
Tuner: TDQ-6FT / W126H
Technical Specifications LT3217S
BBK LT3217S
General recommendations for repairing TV LCD
BBK LT3217S, like other televisions, it is advisable to start repairing by inspecting external and internal elements and modules. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting, even before the necessary measurements are taken. Experienced repairmen are well aware of how ring cracks in soldered terminals look, swollen capacitors, and other causes of problems in electronic devices.
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, and there is not the slightest sign of operability - the most likely malfunction is in the power module. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the NCP1207A PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
If there is no image when you turn on the BBK LT3217S, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
The motherboard RSAG7.820.1269 / ROH VER.C must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary. In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - A25L40PUO, 24C32AN, 24C08, AP1520, 4558CM, TDA9886TS, TDA7266SA which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If the TV works normally from external devices, but does not tune into television channels, the TDQ-6FT / W126H 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
The appearance of the MainBoard RSAG7.820.1269 is shown in the figure below:RSAG7.820.1269
RSAG7.820.1269 can be used in TVs:
BBK LT2617S (Panel V260B1-L02 rev.c1), BBK LT2621S (Panel V260B1-L02), BBK LT3221S (Panel V315B1-L01 Rev.C2), BBK LT3217S (Panel AX080D002F), BBK LT3219S (Panel V315B1-L01 Rev.C2).
The appearance of the power supply
Main features of the BBK LT3217S device:
Installed matrix (LCD-panel) AX080D002F.
The matrix control uses the Timing Controller (T-CON) MDK336V-0N ;.
The HIU-812-S inverter is used to power the backlight, controlled by the BD9897FS PWM controller. As power elements of the inverter, keys of the FDD8447L type are used.
The necessary supply voltages for all nodes of the BBK LT3217S TV are generated by the RSAG7.820.1032 power module or its analogs using NCP1207A microcircuits and power switches of the N80C, 17A06 type.
MainBoard - the main board (motherboard) is an RSAG7.820.1269 module, using microchips MST9E19B, A25L40PUO, 24C32AN, 24C08, AP1520, 4558CM, TDA9886TS, TDA7266SA and others.
The TDQ-6FT / W126H tuner provides television reception and channel tuning.
Information from an alternative source:
BBK LT3221S, BBK LT3217S
Panel Type (Matrix): V315B1-L01 Rev. C2,
Motherboard: RSAG7.820.1269 / ROH VER.C, AP1520, 24C02BI, TE330, 4558CM x3, ATEL740-24C32AN, ATMLH802-048, A26L40PUO, TDA9886TS, TDA7266SA, Tuner: TDQ-6FT / W126H \ OH
T-con: V315B1-C01, CM2681A-KQ, L445730P731271.13YM x2, AS15-G
Invertor: I315B1-16A, OZ964GN, BA10324AF, BA74BN x 8, Tr-r: 4013L 0812y4 KG-4 x8
PSU: RSAG7.820.1032 / ROH VER.H, 1207 PEMK, 3N80C, 17A06 PALX, Circuit I315B1-16A
Additional technical information about the panel:
Brand: IPS Alpha
Model: AX080D002F
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS-Pro, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare
Brightness: 450 cd / m²
Contrast Ratio: 850: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 16 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
BBK LT3217S LCD TV with AX080D002F LCD, 32 "(81 cm) diagonal size in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1500: 1. It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard for 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 max 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 10 W (2x5 W) provides 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, 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, 1360x768.
The power consumed by the TV in the operating mode from the network is 165 watts.
Overall dimensions: 800x599x242 mm.
TV Weight: 15 kg.
Attention! The BBK LT3217S LCD TV panel AX080D002F is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!