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 32LE6020

Technical description and composition of the TV AIWA 32LE6020, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 32LE6020
Chassis / Version: V1N09
Panel: SEL320HY (CD0-701) (05)
LED backlight: SEL320HY-CD0300-X3
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated into PSU; 47V
PWM LED driver: MP3398A
MOSFET LED driver: ME15N10-G
Power Supply (PSU): 168P-L2L021-W0 5800-L2L021-W000
PWM Power: TEA1733
MOSFET Power: TF11N70
MainBoard: 5800-A6M88G-0P00 Ver00.01
IC MainBoard: NAND Flash: TC58NVG1S3HTA00, EEPROM: K24C64
Tuner: NoName
Specifications 32LE6020
AIWA 32LE6020
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 32LE6020 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
With such manifestations, a malfunction is most likely to be detected in the 168P-L2L021-W0 power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (TF11N70) and rectifier diodes in the converters for a short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. TEA1733 PWM controllers (PWMs), if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
As a rule, in such cases there is no display backlight. 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 detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 5800-A6M88G-0P00 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). When repairing an MB board, you need to check its components NAND Flash: TC58NVG1S3HTA00, EEPROM: K24C64. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If a NoName tuner is suspected of a malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Owners and users of the AIWA 32LE6020 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
FIRMWARE FOR SPI FLASH  ----------->   AIWA 32LE6020 V1N09, Main: 5800-A6M88G-0P00 Ver00.01, Panel: SEL320HY (CD0-701)(05)


 To reduce the backlight current, the total resistance of the resistors relative to the housing on the ISET pin of the MP3398A should be proportionally increased. ISET (current setting) - pin 8 in the SOIC-20 package or pin 6 in the SOIC-16 package.


Repair MainBoard
The appearance of the MainBoard 5800-A6M88G-0P00 is shown in the figure below:
5800-A6M88G-0P00
5800-A6M88G-0P00 can be used in TVs:
AIWA 32LE6020 (Panel SEL320HY (CD0-701)(05)), AIWA 40LE6120 (Panel SEL400FY(QD0-701)(05)), ERISSON 40LES68 (Panel 1080p Full HD 1920x1080), TELEFUNKEN LED40S13T2 (Panel SEL400FY (QD0-701)(02)).
The appearance of the power supply
Key Features of AIWA 32LE6020:
Installed matrix (LED panel) SEL320HY (CD0-701) (05).
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-5.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3398A PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The necessary supply voltages for all nodes of the TV AIWA 32LE6020 are formed by the power supply module 168P-L2L021-W0, or its analogs using TEA1733 microcircuits and power switches of the TF11N70 type.
MainBoard - the main board (motherboard) is a 5800-A6M88G-0P00 module, using NAND Flash chips: TC58NVG1S3HTA00, EEPROM: K24C64 and others.
The NoName tuner provides television reception and channel tuning.


 Trademark: AIWA, Model: 32LE6020.
Shortly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, sound: 12 W, HDMI connectors: 3, Internet access, Wi-Fi, Smart TV.
The composition includes MainBoard 5800-A6M88G-0P00 Ver00.01 and LCD panel (matrix) SEL320HY (CD0-701) (05).
Power Supply Unit (PSU) 168P-L2L021-W0 5800-L2L021-W000 Power Supply.
AIWA 32LE6020 TV with 32 "(81 cm) diagonal LCD display, 32: 9 format SEL320HY. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved by special control of the LEDs. In this model uses side lighting from Edge LEDs.
The SEL320HY panel (CD0-701) (05) and the motherboard software 5800-A6M88G-0P00 provide high-definition image viewing at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready).
32LE6020 TV is equipped with SMART software and the ability to work on the Internet. Connecting to a network can be done via Wi-Fi. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 12 W (2x6 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 x3, MHL, USB x2, Ethernet (RJ-45), Wi-Fi. 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, 1360x768. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 818x508x128 mm.
TV mass: 7.8 kg.
Attention! The SEL320HY panel (CD0-701) (05) of the AIWA 32LE6020 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 05:36
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