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 !

Wednesday, 8 April 2020

REPAIR / SERVICING TV AKAI LEA-19S02P

Technical description and composition of the AKAI LEA-19S02P TV, panel type and applicable modules. The composition of the modules.
AKAI LED
Model: LEA-19S02P
Chassis / Version: T.VST26.7A
Panel: MT185GW01 V.1
LED driver (backlight): SS-LED005 REV: 2.0 (suitable AY21LD-06S02)
Power Supply (PSU): Adapter 12V
MainBoard: T.VST26.7A (100093)
IC MainBoard: TSUMV26KE-LF, 432A-2GLI, 25Q80BVSLG_, TDA1517P, 24c32
Tuner: TDQ-ATF27WT-F
Control: A4001032
Technical Specifications LEA-19S02P
AKAI LEA-19S02P
General repair guidelines for TV LCD LED
Possible malfunctions
- The AKAI LEA-19S02P TV does not turn on at all. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, in most cases, the Adapter power module is faulty.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. 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 a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- 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
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- 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 T.VST26.7A 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). Board repair and replacement of the TSUMV26KE-LF, 432A-2GLI, 25Q80BVSLG_, TDA1517P, 24c32 microcircuits are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before changing the tuner TDQ-ATF27WT-F, if it is not possible to tune to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of the AKAI LEA-19S02P TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability.........


SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    AKAI LTA-16S01P, LTA-19S01P, LTA-22S01P, LTA-24S01P, LEA-16S02P, LEA-19S02P chassis T.VST26.7A 
 The appearance of MainBoard T.VST26.7A is shown in the figure below:
T.VST26.7A
T.VST26.7A can be used on TVs:
AKAI LEA-19S02P (Panel MT185GW01 V.1), Akai LTA-24S01P (Panel M236H1 L01 Rev.C1), AKAI LTA-22S01P (Panel CLAA216WA01), AKAI LTA-19S01P (Panel M185B1-L02), HYUNDAI H-LED22V1 (Panel CLAA215FA04), HYUNDAI H-LED19V3 (Panel MT185GW01 V.1), IZUMI TLE15H500M (Panel 15 ").
Key Features of the AKAI LEA-19S02P:
The matrix (LED panel) MT185GW01 V.1 is installed.
The LED driver SS-LED005 is used to power the backlight LEDs.
To power all internal components of the AKAI LEA-19S02P TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a T.VST26.7A module, using TSUMV26KE-LF, 432A-2GLI, 25Q80BVSLG_, TDA1517P, 24c32, and others microcircuits.
The TDQ-ATF27WT-F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: INNOLUX
Model: MT185GW01 V.1
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S3Px2CN WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V

 Brand: AKAI, Model: LEA-19S02P.
Briefly from the TV: LCD, LED backlight, 19 ", 1366x768, 720p HD, sound: 5 watts.
The composition includes MainBoard T.VST26.7A (100093) and LCD panel (matrix) MT185GW01 V.1.
Power supply unit external Adapter 12V.
AKAI LEA-19S02P TV with an LCD screen MT185GW01, diagonal size 19 "(48 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. The ratio of maximum brightness to minimum (contrast) is 1000: 1 The LED display backlighting technology is implemented in the model’s display manufacturing technology. HD images can be viewed in high resolution at 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the speaker system of sound 5 W (2x2.5 W) provide 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, audio x2, component, SCART, RGB, VGA, HDMI. 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 working in the network mode is 40 watts.
Overall dimensions: 470x360x155 mm.
Mass of the TV: 4.3 kg.
Attention! The MT185GW01 V.1 panel of the AKAI LEA-19S02P 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.
Posted By: FRANK at 04:22
TAG: , , , ,