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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Tuesday 14 April 2020

REPAIR / SERVICING TV ERISSON 40LES68

Technical description and composition of the ERISSON 40LES68 TV, panel type and applicable modules. The composition of the modules.
ERISSON LED
Model: 40LES68
Chassis / Version: 5800-A6M88G-0P00
Panel: 1080p Full HD, 1920x1080
MainBoard: 5800-A6M88G-0P00
IC MainBoard: NAND Flash: TC58NVG1S3HTA00, EEPROM: 24C64
Specifications 40LES68
ERISSON 40LES68
General repair guidelines for TV LCD LED
Repair of electronic devices, including the ERISSON 40LES68 TV, it is advisable to start with an external examination of its external and internal elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the 40LES68 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some ERISSON models. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the ERISSON 40LES68 TV has lost the image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the panel 1080p Full HD, 1920x1080). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
Repair or diagnostics of the 5800-A6M88G-0P00 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - NAND Flash: TC58NVG1S3HTA00; . Defective components should be replaced.
Once again, remind users! Attempts to repair the TV ERISSON 40LES68 on its own without the appropriate qualifications and experience can lead to its complete unrepairability!
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)).
Main features of the ERISSON 40LES68 device:
Installed matrix (LED-panel) 1080p Full HD, 1920x1080.
The required supply voltage for all nodes of the TV ERISSON 40LES68 provides a switching power supply.
MainBoard - the main board (motherboard) is a 5800-A6M88G-0P00 module, using NAND Flash chips: TC58NVG1S3HTA00, EEPROM: 24C64 and others.


Trademark: ERISSON, Model: 40LES68.
Briefly from the TV: LCD, 1080p Full HD, 40 "(102 cm) diagonal, HDMI: 3, USB: 2, supports DVB-T2, backlight type: Edge LED.
The composition uses MainBoard 5800-A6M88G-0P00 and an LCD panel (matrix) 1080p Full HD, 1920x1080.
Technical description
The ERISSON 40LES68 TV with a 1080p LCD display, 40 "(102 cm) diagonal in 16: 9 format. The required brightness of the screen is 230 cd / m² by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 5000: 1. The LED panel of this TV uses end LED backlighting - Edge LED.The TV's design and technical features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. The video 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, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV , JPEG.
The power of the sound system 16 W (2x8 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, VGA, HDMI x3, 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 901x558x220 mm.
The mass of the TV: 9 kg.
Attention! The 1080p Full HD, 1920x1080 panel of an ERISSON 40LES68 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 07:46
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