Technical description and composition of the TV BBK 22LEM-3082, type of panel and applicable modules. The composition of the modules.BBK LED
Model: 22LEM-3082 / FT2C
Chassis / Version: UC7.820
Panel: C215X14-E2-P (G2)
LED driver (backlight): JUG7.820.846
PWM LED driver: HAI7101PB, ME15N10-G
Power Supply (PSU): PW52057C REV: 01
PWM Power: LD7750RGR
MainBoard: JUC7.820.00085101
IC MainBoard: MSB101A, EN25F40, GD25Q64, H5TQ1G63EFR, YD1517P
Tuner: DT21WN-2A-B
Technical Specifications 49LEX-5048 / FT2C
BBK 22LEM-3082
General repair guidelines for TV LCD LED
In the absence of any signs of operability, when the BBK 22LEM-3082 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the PW52057C REV: 01 power supply module of the TV. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective chip PWM LD7750RGR from the manufacturer.
In cases where the BBK 22LEM-3082 TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the C215X14-E2-P (G2) panel). When you turn on the TV, the image may appear briefly and disappear. It must be borne in mind that with such manifestations the LEDs themselves also fail.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It is necessary to disassemble the panel and check the LEDs themselves, the soldering of their conclusions, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
To open all transitions, several tens of volts or more are necessary, and it is best to use a current source for such purposes. A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. In the open panel, each LED must be checked. If your multimeter cannot open the LED transitions in forward bias, then see the presence of the PN transition 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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MSB101A, EN25F40, GD25Q64, H5TQ1G63EFR, YD1517P with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the DT21WN-2A-B tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Independent repair of the BBK 22LEM-3082 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> , EEPROM BBK 22LEM-3082/FT2C , Main: UC7.820.00085101, Panel: C215X14-E2-P(G2)
The appearance of the MainBoard JUC7.820.00085101 is shown in the figure below: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-3082 device:
Installed matrix (LED-panel) C215X14-E2-P (G2).
The LED driver JUG7.820.846 is used to power the backlight LEDs, it is controlled by the HAI7101PB, ME15N10-G PWM controller.
The necessary supply voltages for all nodes of the TV BBK 22LEM-3082 are generated by the PW52057C power supply module or its analogs using LD7750RGR microcircuits.
MainBoard - the main board (motherboard) is a JUC7.820.00085101 module, using microchips MSB101A, EN25F40, GD25Q64, H5TQ1G63EFR, YD1517P and others.
The DT21WN-2A-B tuner provides television reception and channel tuning.