Technical description and composition of the BBK 22LEM-1015 TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: 22LEM-1015 / FT2C
Chassis / Version: JUC7.820.00128709
Panel: C215F14-E4-P
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: ME15N10
Power Supply (PSU): Adapter 12V
MainBoard: JUC7.820.00128709
IC MainBoard: SPI Flash: 25Q64, Audio: YD1517P
Tuner: CH DMI21-8I6RH / 5508FW
Technical Specifications 22LEM-1015 / FT2C
BBK 22LEM-1015
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The BBK 22LEM-1015 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, in some cases, the Adapter power module is faulty.
The owner of the TV can purchase the adapter 12V external power supply independently, and repairing it is not always advisable, but sometimes it makes sense to open it and eliminate the simple defects that are typical for IIPs. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 JUC7.820.00128709 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). If there is no way to replace the MB (SSB) card, you need to check the health of its elements - SPI Flash: 25Q64, Audio: YD1517P. Defective components should be replaced.
Before changing the CH DMI21-8I6RH / 5508FW tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Owners and users of the BBK 22LEM-1015 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> BBK 22LEM-1015/FT2C, Main: JUC7.820.00128709, Panel: C215F14-E4-P
The appearance of the MainBoard JUC7.820.00128709 is shown in the figure below:JUC7.820.00128709
JUC7.820.00128709 can be used in TVs:
BBK 24LEM-1015/T2C (Panel C240X14-E3-C (G6)), BBK 19LEM-1015/T2C (Panel C185X14-E5-P), SUPRA STV-LC22T440FL (Panel C215F14-E5-P).
Main features of the BBK 22LEM-1015 device:
Installed matrix (LED-panel) C215F14-E4-P.
To power the backlight LEDs, a converter is used, combined with the main board JUC7.820.00128709, controlled by the OB3350CP PWM controller. As the power elements of the LED driver, keys of the type ME15N10 are used.
To power all the internal components of the BBK 22LEM-1015 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a JUC7.820.00128709 module, using SPI Flash chips: 25Q64, Audio: YD1517P and others.
The CH DMI21-8I6RH / 5508FW tuner provides TV reception and channel tuning.
BBK 22LEM-1015 / FT2C LED TV with C215F14-E4-P LCD, 22 "(56 cm) diagonal of 16: 9 format. The required screen brightness of 180 cd / m² is provided by LED backlighting. The ratio of maximum brightness to the minimum (contrast ratio) is 600: 1. This model uses lateral illumination from Edge LEDs.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. high frequency or video the signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG .
The power of the sound system 6 W (2x3 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, component, VGA, HDMI, 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, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C MPEG4, DVB-T2 standards.
Overall dimensions: With a support of 510x337x165 mm, Without a support of 510x303x52 mm.
Mass of the TV: 3.85 kg.
Attention! The C215F14-E4-P panel of the BBK 22LEM-1015 / FT2C LED TV 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.
