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 32LE3020

Technical description and composition of the TV AIWA 32LE3020, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 32LE3020
Chassis / Version: V1K10
Panel: K315A1C3E4 KONKA
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9906
Power Supply (PSU): KIP-L110E02C2-01 34007238
PWM Power: FAN7930, FSGM300
MOSFET Power: 2SK4108
MainBoard: MSD309_REV-00 sticker: KDL32MS18A-K-E4K
IC MainBoard: SPI FLASH: 25X64, EEPROM: 24C64,24C04
Specifications 32LE3020
AIWA 32LE3020
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 32LE3020 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, a fault is detected in the power module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
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.
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 microcircuits are usually checked by replacement with new ones, or obviously working.
- 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
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard MSD309_REV-00 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 attempts to repair the MB board (SSB), you need to check the health of its elements - SPI FLASH: 25X64, EEPROM: 24C64,24C04 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Attention to users! Self-repair of the TV AIWA 32LE3020 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

 FIRMWARE   ----------->   AIWA 32LE3020 V1K10, Main: MSD309_REV-00 sticker: KDL32MS18A-K-E4K, Panel: K315A1C3E4 KONKA


 The appearance of the MainBoard MSD309_REV-00 is shown in the figure below:
MSD309_REV-00
The appearance of the power supply
Key Features of AIWA 32LE3020:
Installed matrix (LED-panel) K315A1C3E4 KONKA.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9906 PWM controller.
The necessary supply voltages for all nodes of the AIWA 32LE3020 TV are generated by the KIP-L110E02C2-01 power module or its analogs using FAN7930, FSGM300 microcircuits and 2SK4108 type power switches.
MainBoard - the main board (motherboard) is an MSD309_REV-00 module, using microchips SPI FLASH: 25X64, EEPROM: 24C64,24C04 and others.

 Trademark: AIWA, Model: 32LE3020.
Briefly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, DVR, sound: 10W, HDMI connectors: 4.
The composition uses the MainBoard MSD309_REV-00 sticker: KDL32MS18A-K-E4K and the LCD panel (matrix) K315A1C3E4 KONKA.
Power Supply Unit (PSU) KIP-L110E02C2-01 34007238 Power Supply.
AIWA 32LE3020 TV with K315A1C3E4 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required brightness of the screen is 350 cd / m² with LED backlighting. Dynamic contrast ratio of 80000: 1 is achieved by special control of the LEDs. In this model uses side lighting from Edge LEDs.
The KONKA K315A1C3E4 panel and the MSD309_REV-00 motherboard software provide high-definition HD viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard. 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.
Supported media file formats: MP3, MPEG4, JPEG.
The power of the sound system 10 W (2x5 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, VGA, HDMI x4, USB x2. 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 digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV working in the network mode is 120 watts.
Overall dimensions: 782x560x240 mm.
The mass of the TV: 9 kg.
Attention! The K315A1C3E4 KONKA panel of an AIWA 32LE3020 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 05:29
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