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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Wednesday, 8 April 2020

REPAIR / SERVICING TV AIWA 22LE5020

Technical description and composition of the TV AIWA 22LE5020, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 22LE5020
Chassis / Version: 5800-A6M35G-0P30 Ver: V1R07
Panel: LC215DU2A
LED backlight: CRH-A22303001045BQREV1.2
T-CON: RUNTKB103ZZPN DA215
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): H2L051A 12V 3A
MainBoard: 5800-A6M35G-0P30
IC MainBoard: CPU: MSD3463GSA-W2, SPI FLASH: 25Q64CS
Tuner: NoName
Specifications 22LE5020
AIWA 22LE5020
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 22LE5020 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the H2L051A power supply is usually faulty. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
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.
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.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
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). Often, the MB (SSB) card needs to be replaced in case of complex faults that are difficult to detect. When trying to repair, you should check its elements - CPU: MSD3463GSA-W2, SPI FLASH: 25Q64CS 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.
The failure of the NoName tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, remind users! Attempts to self-repair a TV AIWA 22LE5020 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH  ----------->   AIWA 22LE5020, Main: 5800-A6M35G-0P30, Panel: LC215DU2A

 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 22LE5020:
Installed matrix (LED panel) LC215DU2A.
The matrix control uses the Timing Controller (T-CON) RUNTKB103ZZPN.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A6M35G-0P30.
The formation of the necessary supply voltages for all nodes of the AIWA 22LE5020 TV is carried out by the H2L051A power module, or its analogs.
MainBoard - the main board (motherboard) is a 5800-A6M35G-0P30 module, using CPU chips: MSD3463GSA-W2, SPI FLASH: 25Q64CS and others.
The NoName tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: PANDA
Model: LC215DU2A
Type: a-Si TFT-LCD, CELL
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: VA, Normally Black, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 4.0% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 25 (Tr + Td)
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V

 Trademark: AIWA, Model: 22LE5020.
Briefly from the TV: LCD, LED backlight, 22 ", 1366x768, 720p HD, sound: 6W, HDMI connectors: 2.
The composition uses the MainBoard 5800-A6M35G-0P30 and the LCD panel (matrix) LC215DU2A.
Power Supply Unit (PSU) H2L051A 12V 3A Power Supply.
AIWA 22LE5020 TV with LC215DU2A LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The required brightness of the screen is 220 cd / m² LED backlight LED. Dynamic contrast ratio of 40,000: 1 is achieved by special control of the LEDs. In manufacturing technology The display of this model is implemented LED backlight.
The LC215DU2A panel and the 5800-A6M35G-0P30 motherboard software provide high-definition HD 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 panel of the LC215DU2A AIWA 22LE5020 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 08:41
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