Technical description and composition of the BBK 32LEX-5045 TV, panel type and modules used. The composition of the modules.
BBK LED
Model: 32LEX-5045 / T2C
Chassis / Version: CV338H-X42
Panel: V320BJ6-Q01 CX315DLEDM
LED Backlight: CX32D06-ZC22AG-05 // PT30W45 V1
LED Driver (Backlight): Integrated Into Mainboard
PWM LED DRIVER: BIT3267
MOSFET LED DRIVER: AOD4454
POWER SUPPLY (PSU): Integrated Into Mainboard
PWM POWER: PF6000AG
MOSFET POWER: 70R600
Mainboard: CV338H-X42
IC Mainboard: CPU: MSD6A338, SPI Flash: 25Q16DV, Audio: MP7752
TUNER: DVBT / T2
TECHNICAL SPECIFICATIONS 32LEX-5045 / T2C
BBK 32LEX-5045
General Recommendations for Repair TV LCD LED
Possible manifestations of defects
- BBK 32lex-5045 does not turn on, does not respond to the remote control and control panel buttons, the indicators are not lit and not blink.
Fault In such cases should be searched primarily in the power supply source (AC / DC) circuit (AC / DC) of the network voltage, which is combined with the main Mainboard CV338H-X42 board in this model. It is necessary to measure its output supply voltages, and in the case of their absence, check the health of the power keys (70R600) of transducers and rectifying diodes on the probability of breakdown in semiconductor PN transitions.
In the breakdowns of diodes in secondary circuits, the converter can operate in the emergency short circuit mode without output voltages, and when the PRT in the power elements of the primary circuit, a network fuse and / or current sensor in the key of the key is usually broken.
MOS-FET keys used in pulse power sources usually fail because of the fault of other elements that can output it in key mode, or provoke excess of maximum current or voltage values. These may be chains that feed the PWM controller, damper or frequency chains, or EOS elements (negative feedback) in the stabilization scheme. PHIM controllers (PWM) PF6000AG, in the absence of external damage and short circuit between outputs, are checked by replacement for obviously good.
- No image, but there is sound and all other functions work. Sometimes when turned on, the image for a second appears and disappears.
Often, in such cases there is no LED-panel backlight. More often the reason for the LED break, or a bad contact in the slats connectors, the LED driver can be less frequently defective.
To identify a break in the LED line without disassembling the panel, simply multimeter is impossible. The LEDs are connected in series and to open their transitions, a voltage of several dozen volts will be required. Ideally, for such purposes, the current source will fit. You can open the panel and check each LED separately. Usually, Chinese multimeters are slightly flashing one 3-volt LED if you connect the probe to it in the forward direction (red dipstick - to the anode, black to the cathode). At dual 6-volt indicators, the operation of LED-A can serve as a PN-transition of its emergency stabilion. In the event of a malfunction, LED-and its stabilion will either be broken, either breaks through to / s.
If the BBK 32lex-5045 / T2C does not have an image, but there is sound, often the CX315DLEDM display illumination does not work. Moreover, the LEDs usually fail within the panel, less often a LED driver.
In such cases, you can see the barely noticeable image with successful appearance of external lighting on the screen.
To replace LEDs, the CX315DLEDM LCD panel is required - a process requiring experience and qualifications from the Wizard. We do not recommend producing such works on your own owners of televisions and masters that do not have the experience of repairing LCD panels
If there is no image, and the backlight works - the screen when turned on it becomes a little lighter, and in the open TV it is visible light through the holes in the panel housing.
In this case, the panel may also be a faulty - damage to slats, loops, for example, as a consequence of moisture from hitting the screen after unsuccessful screening of the screen, the T-CON board (timing controller) may be faulty. But it is often faulty and the main board of Mainboard CV338H-X42 is, the software failure is also possible.
Then, first of all, it is necessary to check the supply voltage of the panel, the fuses on the T-CON board, as well as the supply and reference voltages of column and lowercase drivers - VGH, VGL, VCOM.
If these measurements within the norm are needed by an oscilloscope to track the passage of LVDS signals from Mainboard CV338H-X42, as well as synchronizing signals to the plumes with drivers.
Spilled or unsuccessfully floated screens of LED-TVs have the opportunity to restore, about half of the cases, usually, if there are no significant damage in loops and panel strobs.
- The indicator on the front panel blinks, the TV is not turned on in the operating mode, the remote control does not respond.
Repair or diagnostics of the CV338H-X42 motherboard should be started with checking stabilizers and power converters needed to power the chip and matrix. If necessary, you should update or replace software (software). In cases of complex MB (SSB) repairs and in the presence of necessary skills and equipment, it may sometimes be necessary to replace its CPU chips: MSD6A338, SPI Flash: 25Q16DV, AUDIO: MP7752 and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Before replacing the DVBT / T2 tuner, if there is no adjustment to the channels, before you need to check the power supply and supply voltage at its outputs. It is also necessary to make sure that the data exchange of the tuner and the processor over the I2C bus
Attention! Users and owners of 32lex-5045 TVs that do not have appropriate qualifications, knowledge and experience, we categorically recommend attempts to independently repair in order to avoid negative consequences that can lead to complete unrepair device.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK 32LEX-5045 Chassis CV338H-X42.
Refinement after repairing the backlight.
Reduce the Bit3267 driver highlighting current to 225 MA - remove one of the four OHM resistors in the current sensor on the CV338H-X42 board.
Driver current limit. Bit3267s.
General information.
To reduce the backlight current in the LED drivers with the BIT3267 controller, you should increase the overall resistance of the low-level resistors of the Rset current sensor connected to the output of the Bit3267 microcircuit. Usually it is connected to the LED connector.
Common RLED resistance can be calculated from the RLED = 0.21 / ILED ratio.
PDF document is attached. ----------> BIT3267
The main features of the BBK 32LEX-5045 device:
Matrix (LED panel) is installed V320BJ6-Q01 CX315DLEDM.
To power the backlight LEDs, a converter combined with the main CV338H-X42 board is controlled by the BIT3267 PWM controller. The keys of type AOD4454 are used as the LED-driver strength elements.
The power module is combined with the Mainboard and is made according to the AC / DC voltage converter circuit using the PF6000AG chip and 70R600 power keys.
Mainboard - the main board (motherboard) is a CV338H-X42
module, using CPU microcircuits: MSD6A338, SPI Flash: 25Q16DV, Audio: MP7752 and others.
DVBT / T2 tuner provides television programs and settings to channels.
Additional technical information on 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.
LED TV BBK 32LEX-5045 / T2C with CX315DLEDM LCD, diagonal size 32 "(81 cm) of a 16: 9 format. The required brightness of the glow of the screen 250 kD / m² is provided by LED lighting LED. The ratio of the maximum brightness to the minimum (contrast) It is 3000: 1. In the LCD panels are implemented backlight from the Direct LED LED.
CX315DLEDM matrix and MainBoard CV338H-X42 CV338H-X42 software implements HD image quality when resolving 1366x768 pixels in the 720p graphic decomposition standard (HD READY).
32LEX-5045 / T2C has built-in SMART software and pre-installed Android operating system. Connecting to the Internet can be carried out by wireless Wi-Fi communication. Supported multimedia file formats: MP3, MPEG4, HEVC (H.265), XVID, DivX, JPEG.
The power of the acoustic system of sound 16 W (2x8 W) provide two speakers. The NICAM stereo processing system is used and the Sound Surround Sound Sound Function.
The external interface (connection with other devices) is supported by standard input and output connections: antenna input (RF), AV, component, HDMI X2, USB X2, Ethernet (RJ-45), Wi-Fi. There is a way to connect headphones. The digital tuner is able to receive television channels in DVB-T, DVB-T2, DVB-C standards.
The power consumed by the TV operating in the network mode is 56 W. Powerboard in Mainboard.
Overall dimensions: with Stand 729x469x168 mm, without a stand 729x429x76 mm.
TV mass: 3 kg.
Attention! The BBK 32LEX-5045 / T2C LED TV LED-TV CX315DLEDM panel is expensive and unreliable items.
Do not allow any shocks on the glass and pressure on the screen surface to avoid damage to the LED panel!
Also unsafe hitting the fluid on the screen. Sometimes one drop is enough if it shocks down the glass on the plumes so that the TV becomes unrepretentious.