REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Saturday 21 March 2020

REPAIR / SERVICING TV BBK 22LEM-1006

Technical description and composition of the TV BBK 22LEM-1006, type of panel and applicable modules. The composition of the modules.
BBK LED
Model: 22LEM-1006 / FT2C
Chassis / Version: CV9202L-T
Panel: M215HTN01.1 KM215N19-AU-01
T-CON: M215HTN01.1 21M04-C02
LED driver (backlight): integrated into PSU
Power Supply (PSU): KM-LED36C.PCB
MainBoard: CV9202L-T
IC MainBoard: Cpu: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517
Tuner: ST03WS-2A-E
Technical Specifications 49LEX-5048 / FT2C
BBK 22LEM-1006
General repair guidelines for TV LCD LED
Possible malfunctions
- The BBK 22LEM-1006 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
Often in such cases, the KM-LED36C.PCB power module is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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 CV9202L-T 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). In cases of complex repairs of MB (SSB) and with the necessary skills and equipment, sometimes it may be necessary to replace its Cpu chips: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517 and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
The malfunction of the tuner ST03WS-2A-E is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, remind users! Attempts to self-repair a BBK 22LEM-1006 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH  ----------->   BBK 22LEM-1006/FT2C, Main: CV9202L-T, Panel: M215HTN01.1 KM215N19-AU-01



 The appearance of the MainBoard CV9202L-T is shown in the figure below:
CV9202L-T
The MainBoard CV9202L-T uses the SPV9202BD processor, W6310GKB-12 RAM, and SPI FLASH 8Mb ROM.
It is advisable to start the repair of the motherboard by checking all voltage converters and linear stabilizers necessary to provide power to the nodes and chips in the operating and standby modes. The processor core is powered by + 1V. Also, for operation of the SPV9202BD, voltages + 2.5V and + 3.3V are required. Check the power of the LCD panel (depending on the type, + 5V or + 12V), it is convenient to measure directly on the LVDS connector. If the TV does not exit Stand-by mode, if it has the necessary supply voltage, does not respond to the Remote Control and control buttons, the SPI Flash 25Q64 firmware should be updated.
CV9202L-T can be used in TVs:
AIWA 24LE7020 (Panel V236BJ1-P01), BBK 22LEM-1006/FT2C (Panel M215HTN01.1 KM215N19-AU-01), DEXP 19A3100 (Panel CX185LEDM), DEXP 22A7100 (Panel T215HVN01.0 M215HVN01.0), FUSION FLTV-24T22 (Panel M236HGE-P02), FUSION FLTV-22T22 (Panel 720p HD 1366x768), SHIVAKI STV-24LED14 (Panel V236BJ1-P01 / CX236LEDM), SUPRA STV-LC24T410FL (Panel M236HGE-P01), SUPRA STV-LC19T410WL (Panel HK185WLEDM CH25H), SUPRA STV-LC22T410FL (Panel LC215DT5A), SUPRA STV-LC24T410WL (Panel HK236WLEDM-CH24H), SUPRA STV-LC19T880WL (Panel LC185TT7A).
The appearance of the power supply
Main features of the BBK 22LEM-1006 device:
Installed matrix (LED-panel) M215HTN01.1 KM215N19-AU-01.
The matrix control uses the Timing Controller (T-CON) M215HTN01.1.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the BBK 22LEM-1006 TV is carried out by the power module KM-LED36C.PCB, or its analogues.
MainBoard - the main board (motherboard) is a CV9202L-T module using Cpu: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517 and others.
The ST03WS-2A-E tuner provides TV reception and channel tuning.


 Brand: BBK, Model: 49LEX-5048 / FT2C.
Short from TV: LCD, 49 ", 1920x1080, 1080p Full HD, DVR, sound: 16 W, HDMI: 3, Internet access, Wi-Fi, Smart TV.
Manufacturer: TELEBALT Kaliningrad, Kamskaya, 62. The assembly can be in the city of Guards, st. Station, 6 (PKV).
Developer: BBK Electronics LTD. China
BBK 49LEX-5048 / FT2C LED TV with 49 "(124 cm) LCD display in 16: 9 format. The required brightness of the screen is 250 cd / m² with LED backlight. The ratio of maximum brightness to minimum (contrast) is 6000: 1. Direct LED backlighting is realized in the LCD-panel. The design and technical capabilities of the TV provide viewing of broadcasts and films in high quality HD with a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD).
49LEX-5048 / FT2C has built-in SMART Software and pre-installed Android Operating System. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, MPEG4, HEVC (H.265), Xvid, DivX, JPEG.
The power of the sound system 16 W (2x8 W) provides two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n. An output for connecting headphones is provided. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 1106x692x286 mm, without stand 1106x642x90 mm.
TV Weight: 4.7 kg.
Attention! The BBK 49LEX-5048 / FT2C LED TV panel 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.
Posted By: FRANK at 08:34
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