Technical description and composition of the TV BBK 22LEM-1001, type of panel and applicable modules. The composition of the modules.BBK LED
Model: 22LEM-1001 / FT2C
Chassis / Version: JUC7.820.00085101
Panel: M215X12-E2-P
LED driver (backlight): JUG7.820.846
PWM LED driver: HAI7101PB
MOSFET LED driver: ME15N10-G
Power Supply (PSU): PW52057C
PWM Power: LD7750RGR
MOSFET Power: KF4N65F
MainBoard: JUC7.820.00085101
IC MainBoard: CPU: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P
Tuner: DT21WN-2A-E
Technical Specifications 22LEM-1001 / FT2C
BBK 22LEM-1001
General repair guidelines for TV LCD LED
Possible malfunctions
- BBK 22LEM-1001 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the PW52057C module, is faulty. In the absence of the necessary supply voltage in the secondary circuits of the converters, it is necessary to check the power switches (KF4N65F) and rectifier diodes for a possible partial or complete breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7750RGR, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Usually in such cases there is no backlight LED-panel (matrix). 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).
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the JUC7.820.00085101 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board: CPU: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If the TV works normally from external devices, but does not tune into television channels, the DT21WN-2A-E tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. 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.
Attention to users! Independent repair of the BBK 22LEM-1001 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> BBK 22LEM-1001/FT2C, Main: JUC7.820.00085101, Panel: M215X12-E2-P
JUC7.820.00085101
JUC7.820.00085101 can be used in TVs:
BBK 22LEM-3082/FT2C (Panel C215X14-E2-P(G2)), BBK 24LEM-1004/T2C (Panel C236X13-E4-C(G2), BBK 19LEM-1004/T2C (Panel C185X14-E3-P (G2)), BBK 19LEM-1001/T2C (Panel M185X12-E1-P (G4) ), ROLSEN RL-19E1308T2C (Panel C185X14-E3-P(G2)), ROLSEN RL-22E1308FT2C (Panel C215X14-E2-P(G2)), ROLSEN RL-24E1302T2C (Panel C236X13-E2-C (G2) ).
The appearance of the power supply
Main features of the BBK 22LEM-1001 device:
Installed matrix (LED panel) M215X12-E2-P.
The LED driver JUG7.820.846 is used to power the backlight LEDs, it is controlled by the HAI7101PB PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The necessary supply voltages for all nodes of the TV BBK 22LEM-1001 are generated by the PW52057C power supply module or its analogs using LD7750RGR microcircuits and KF4N65F type power switches.
MainBoard - the main board (motherboard) is a JUC7.820.00085101 module, using CPU chips: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P and others.
Tuner DT21WN-2A-E provides the reception of television programs and tuning to channels.
Brand: BBK, Model: 22LEM-1001 / FT2C.Shortly from the TV: LCD, 1080p Full HD, diagonal 22 "(56 cm), there is HDMI, there is USB, there is support for DVB-T2, the type of backlight: Edge LED.
The composition uses MainBoard JUC7.820.00085101 and LCD-panel M215X12-E2-P.
Power Supply Unit (PSU) PW52057C Power Supply.
BBK 22LEM-1001 / FT2C LED TV with CX215LEDM LCD, diagonal size 22 "(56 cm) in 16: 9 format. The required screen brightness of 180 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) 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 the graphic resolution of the standard 1080p (Full HD). Input high-frequency or video signal It 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, DivX, MKV , JPEG Stereo audio is provided by two built-in speakers, and NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, 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. The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C MPEG4, DVB-T2 standards.
Overall dimensions: With stand 514x358x176 mm, Without stand 514x315x59 mm.
TV Weight: 3.5 kg.
Attention! The CX215LEDM (LC215DT6A) panel of the BBK 22LEM-1001 / 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.
