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 40LE6120

Technical description and composition of the TV AIWA 40LE6120, type of panel and applicable modules. The composition of the modules.
AIWA LED
Model: 40LE6120
Chassis / Version: V1N09
Panel: SEL400FY (QD0-701) (05)
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9967GN
MOSFET LED driver: ME15N10-G
Power Supply (PSU): 168P-L3L025-W0
PWM Power: TEA1733
MainBoard: 5800-A6M88G-0P00
IC MainBoard: NAND Flash: TC58NVG1S3HTA00, EEPROM: K24C64
Specifications 40LE6120
AIWA 40LE6120
General repair guidelines for TV LCD LED
Possible malfunctions
- AIWA 40LE6120 TV does not turn on, does not respond to the remote control and the control panel buttons, indicators do not light up and do not blink.
In some of these cases, the main switching power supply, the 168P-L3L025-W0 module, is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable 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 mains fuse and, less often, the current sensor at the source of the key are most often cut off.
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 chassis and open fault between the terminals, are usually checked by replacement.
- 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.
Usually in such cases, a malfunction is detected in the backlight nodes 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 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, you can sometimes 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, does not respond to the remote control. The indicator blinks or signals standby mode.
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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - NAND Flash: TC58NVG1S3HTA00, EEPROM: K24C64 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Owners and users of the AIWA 40LE6120 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!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    168P-L3L025-W0 Power supply


 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 40LE6120:
Installed matrix (LED-panel) SEL400FY (QD0-701) (05).
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9967GN 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 40LE6120 are generated by the power supply module 168P-L3L025-W0, or its analogs using TEA1733 chips.
MainBoard - the main board (motherboard) is a 5800-A6M88G-0P00 module, using NAND Flash chips: TC58NVG1S3HTA00, EEPROM: K24C64 and others.

 Trademark: AIWA, Model: 40LE6120.
Shortly from the TV: LCD, LED backlight, 40 ", 1366x768, 720p HD, sound: 12 W, HDMI connectors: 3, Internet access, Wi-Fi, Smart TV.
The composition includes MainBoard 5800-A6M88G-0P00 and LCD-panel SEL400FY (QD0-701) (05).
Power Supply Unit (PSU) 168P-L3L025-W0 power Supply.
TV AIWA 40LE6120 with LCD display SEL400FY (QD0-701) (05), diagonal size 40 "(102 cm) 16: 9 format. The required brightness of the screen 300 cd / m² is provided by LED backlight LED. Dynamic contrast ratio of 100000: 1 is achieved special control of LEDs operation.This model uses side illumination from Edge LEDs.
The SEL400FY panel (QD0-701) (05) and the software on the 5800-A6M88G-0P00 motherboard provide high-definition HD viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard.
The 40LE6120 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 takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Supported media file formats: MP3, WMA, MPEG4, 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: 976x624x137 mm.
Mass of the TV: 14.3 kg.
Attention! Panel SEL400FY (QD0-701) (05) LED-TV AIWA 40LE6120 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 06:13
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