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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday 19 March 2020

REPAIR / SERVICING TV BBK LD2213SU

Technical description and composition of the BBK LD2213SU TV, type of panel and applicable modules. The composition of the modules.
BBK
Model: LD2213SU Ver1
Chassis / Version: J2233M1.M
Panel: M216H1-L01 RevC1, LTA216AT01
Inverter (backlight): LK-IN220417A Rev1.5 CQC03001006425
Power Supply (PSU): LK-OP106001-013 Rev1.1 E248439
MainBoard: L2M25 (03) // L2M18 (03)
IC MainBoard: SA7454, MP1484EN (8), DVD 00K102, AM5888S
Tuner: UVL7705VEAW1
Control: LT121K
BBK
Model: LD2213SU Ver2
Chassis / Version: v.J2233M1L.C
Panel: LCD LC220WXE-TBA1 // M216H1-L01
Inverter (backlight): LK-IN220417A
PWM Inverter: OB3302CP
MOSFET Inverter: AO4946
Trans Inverter: LKT-035 CAY T-6344 1020
Power Supply (PSU): LK-OP106001-013
MainBoard: MAIN_PCB L2M18 (03)
IC MainBoard: SA7454
Tuner: DWE7053BW
Control: RC-B3-10, RC-2214-D
Technical Specifications LD2213SU
BBK LD2213SU
General recommendations for repairing TV LCD
Possible malfunctions
- The BBK LD2213SU TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
In the vast majority of such cases, a malfunction is detected in the LK-OP106001-013 power supply module. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
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, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the MAIN_PCB 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SA7454 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before replacing the tuner DWE7053BW, if there is no tuning to 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
We recommend the owners of the LD2213SU TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!

 Service Manual with Schematic Diagram 21 pages 2007  model LD1913SU, LD2213SU.

 SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    BBK LD1913SU, LD2213SU L2M18

SCHEMATIC DIAGRAM  / PSU    ------------------>    LK-IN220417A


 The appearance of MainBoard 21901-2 is shown in the figure below:
21901-2
21901-2 can be used in TVs:
BBK LD1516K (Panel SVA156WX1-01TB), BBK LD1906SI (Panel SVA190WX02TB), BBK LD2006K (Panel V201V1-T03 Rev.C4).
Main features of the BBK LD2213SU device:
Installed matrix (LCD panel) LCD LC220WXE-TBA1 or M216H1-L01.
To power the backlight, an inverter LK-IN220417A is used, it is controlled by the PWM controller OB3302CP. A transformer LKT-035 CAY T-6344 1020 is installed in the inverter converter. AO4946 switches are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the BBK LD2213SU TV is carried out by the power module LK-OP106001-013, or its analogues.
MainBoard - the main board (motherboard) is a MAIN_PCB module, using SA7454 chips and others.
The DWE7053BW tuner provides TV reception and channel tuning.


 BBK LD2213SU LCD TV with 22 "(55 cm) LCD LCD, 16: 9 format. 400 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1000: 1. It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: WMA, MPEG4, VideoCD, SVCD, Picture CD, JPEG. Stereo sound is realized by two built-in speakers. 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), component, SCART, RGB, 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.
The power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: 530x399x170 mm.
TV Weight: 5.1 kg.
Attention! The BBK LD2213SU LCD TV LCD panel LC220WXE-TBA1 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 08:34
TAG: , , , ,