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 24LE5020

Technical description and composition of the TV AIWA 24LE5020, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 24LE5020
Chassis / Version: 5800-A6M35G-0P30
Panel: HV236WHB-N00
LED backlight: CRH-A24303002055BGREV1.0
T-CON: HV236WHB-N00 47-6021045; HX8861-J
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): Adapter 12V 3A H2L051A
MainBoard: 5800-A6M35G-0P30 VER00.06
IC MainBoard: CPU: MSD3463GSA-W2, SPI FLASH: 25Q64CS
Specifications 24LE5020
AIWA 24LE5020
General repair guidelines for TV LCD LED
Possible manifestations of defects
- AIWA 24LE5020 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With such manifestations, the Adapter power module usually fails.
This TV model is equipped with an external power adapter type Adapter 12V 3A H2L051A, which the owner can purchase on his own, and repairing it may not always be advisable, however, sometimes it makes some sense to open it and eliminate simple typical defects typical of IPS. 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 of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
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.
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, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 5800-A6M35G-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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: MSD3463GSA-W2, SPI FLASH: 25Q64CS and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Attention TV owners! Self-repair attempts by AIWA 24LE5020 are not recommended by the manufacturer and can lead to serious negative consequences!

 

Repair MainBoard
The appearance of the MainBoard 5800-A6M35G-0P30 is shown in the figure below:
5800-A6M35G-0P30
5800-A6M35G-0P30 can be used in TVs:
AIWA 22LE5020 (Panel LC215DU2A), AIWA 24LE5020 (Panel HV236WHB-N00).
Key Features of AIWA 24LE5020:
Installed matrix (LED panel) HV236WHB-N00.
The matrix control uses the Timing Controller (T-CON) HV236WHB-N00.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A6M35G-0P30.
To power all the internal components of the AIWA 24LE5020 TV, an external adapter type 12V 12V 3A H2L051A is used.
MainBoard - the main board (motherboard) is a 5800-A6M35G-0P30 module, using CPU chips: MSD3463GSA-W2, SPI FLASH: 25Q64CS and others.


 Brand: AIWA, Model: 24LE5020.
Briefly from the TV: LCD, LED backlight, 23.6 ", 1366x768, 720p HD, sound: 6W, HDMI connectors: 2.
The composition includes MainBoard 5800-A6M35G-0P30 VER00.06 and LCD-panel HV236WHB-N00.
Power supply unit external Adapter 12V 3A H2L051A.
AIWA 24LE5020 TV with an HV236WHB-N00 LCD, 23.6 "diagonal size of 16: 9 format. The required screen brightness of 240 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs. Models implemented LED backlight.
The HV236WHB-N00 panel and the 5800-A6M35G-0P30 motherboard software provide high-definition image viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard.
Supported media file formats: MP3, MPEG4, JPEG.
The power of the sound system 6 W (2x3 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), HDMI x2, MHL, USB. 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.
Attention! The HV236WHB-N00 panel of an AIWA 24LE5020 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 04:56
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