Technical description and composition of the BBK 32LEM-1024 TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: 32LEM-1024 / TS2C
Chassis / Version: CV512H-B42 / v1.0
Panel: V320BJ6-Q01
T-CON: V320BJ6-Q01 Rev. C1
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3267
MOSFET LED driver: ME15N10
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: SMK0760F
MainBoard: CV512H-B42
IC MainBoard: CPU: 9206B 1533-DBN, SPI Flash: W25Q64JVSIG
Tuner: CDT-9NT372-RF01 & CDT-9NS161-RD41
Technical Specifications 32LEM-1024 / TS2C
BBK 32LEM-1024
General repair guidelines for TV LCD LED
Possible malfunctions
- The BBK 32LEM-1024 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard CV512H-B42 main board. It is necessary to measure its output voltages, and if they are absent, check the operability of the power switches (SMK0760F) of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM SOT23-6 PWM controllers, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- 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.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED driver).
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 CV512H-B42 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: 9206B 1533-DBN, SPI Flash: W25Q64JVSIG. BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune into television channels, the tuner CDT-9NT372-RF01 & CDT-9NS161-RD41 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, remind users! Attempts to self-repair a BBK 32LEM-1024 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> CV512H-B42-12.
FIRMWARE FOR SPI FLASH -----------> BBK 32LEM-1024/TS2C, Main: CV512H-B42, Panel: V320BJ6-Q01
The appearance of the MainBoard CV512H-B42 is shown in the figure below:CV512H-B42
CV512H-B42 can be used in TVs:
BBK 40LEM-1010/FT2C (Panel CX390DLEDM), BBK 32LEM-1023/TS2C (Panel V320BJ6-Q01), BBK 32LEM-3035/T2C (Panel LS320TU9A00 NJ), BBK 32LEM-1036/TS2C (Panel DS32D6AP0113), BBK 42LEM-1009/FT2C (Panel T420HVN06.1 CX420DLEDM), DEXP F40B7000E (Panel V400HJ6-PE1 CX400DLEDM).
Main features of the BBK 32LEM-1024 device:
Installed matrix (LED-panel) V320BJ6-Q01.
The matrix control uses the Timing Controller (T-CON) V320BJ6-Q01.
To power the backlight LEDs, a converter is used, combined with the main board CV512H-B42, controlled by the BIT3267 PWM controller. As the power elements of the LED driver, keys of the type ME15N10 are used.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter using PWM SOT23-6 microcircuits and power switches of the SMK0760F type.
MainBoard - the main board (motherboard) is a CV512H-B42 module, using CPU chips: 9206B 1533-DBN, SPI Flash: W25Q64JVSIG and others.
The tuner CDT-9NT372-RF01 & CDT-9NS161-RD41 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V320BJ6-Q01
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%)
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
BBK 32LEM-1024 / TS2C LED TV with V320BJ6-Q01 LCD, 32 "(81 cm) diagonal size of 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlight LED. The ratio of maximum brightness to minimum ( contrast ratio) is 3000: 1. LED display technology is implemented in the model’s display technology. HD images can be viewed at 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog PAL systems, SE CAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: WMA, MPEG4, MKV, JPEG.
The power of the sound system 16 W (2x8 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x3, USB. 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 digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
Overall dimensions: with stand 737x473x190 mm, without stand 737x435x83 mm.
Mass of the TV: 6.9 kg.
Attention! The BBK 32LEM-1024 / TS2C LED TV panel V320BJ6-Q01 is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
