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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Thursday, 9 April 2020

REPAIR / SERVICING TV AIWA 24LE8020S

Technical description and composition of the TV AIWA 24LE8020S, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 24LE8020S
Chassis / Version: V1T05
Panel: V236BJ1-P01
LED backlight: CRH-A2430300205713Rev1.0I
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: SOIC8
MOSFET Power: TO-252
MainBoard: 5800-A7N01G-0P30 VER00.07
IC MainBoard: SPI Flash: 25L1606E. AUDIO: TAS5707
Tuner: 5800-J7N01G-0P00 + SAT
Technical Specifications 24LE8020S
AIWA 24LE8020S
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 24LE8020S TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In such cases, the common power source, the AC / DC voltage converter, which is combined with the elements of the main board 5800-A7N01G-0P30, often turns out to be faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TO-252) and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microchips SOIC-8 are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction 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.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 5800-A7N01G-0P30 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).
Before replacing the NONAME + SAT tuner, 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
Attention! For users and owners of 24LE8020S TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.


Repair MainBoard
The appearance of the MainBoard 5800-A7N01G-0P30 is shown in the figure below:
5800-A7N01G-0P30
Key Features of AIWA 24LE8020S:
Installed matrix (LED-panel) V236BJ1-P01.
A converter is used to power the backlight LEDs, combined with the main board 5800-A7N01G-0P30.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter using SOIC8 microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is a 5800-A7N01G-0P30 module, using SPI Flash chips: 25L1606E. AUDIO: TAS5707 and others.
The tuner 5800-J7N01G-0P00 + SAT provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236BJ1-P01
Type: a-Si TFT-LCD, CELL
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 521.471x293.184 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.5% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V


Trademark: AIWA, Model: 24LE8020S.
Briefly from the TV: LCD, LED backlight, 23.6 ", 1366x768, 720p HD, there is a satellite tuner, sound: 8W, HDMI: 2, Internet access, Wi-Fi, Smart TV.
Manufacturer: Russia. Kaliningrad region Developer: Russia.
The composition includes MainBoard 5800-A7N01G-0P30 VER00.07 and LCD-panel V236BJ1-P01. The power supply is combined with the MainBoard.
AIWA 24LE8020S TV with V236BJ1-P01 LCD, 23.6 "(60 cm) diagonal size of 16: 9 format. The required screen brightness of 220 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs. V manufacturing technology of the display of this model implemented LED backlight.
The V236BJ1-P01 panel and the 5800-A7N01G-0P30 motherboard software provide high-quality HD viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard.
The 24LE8020S is equipped with SMART software and the ability to work on the Internet. Connecting to a network can be done via Wi-Fi.
Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the speaker system of sound 8 W (2x4 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, HDMI x2, USB x2, Ethernet (RJ-45), Wi-Fi. An output for connecting headphones is provided. The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
The power consumed by the TV working in the network mode is 50 watts.
Attention! The panel V236BJ1-P01 of the AIWA 24LE8020S 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 05:21
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