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, 15 April 2020

REPAIR / SERVICING TV ERISSON 32LES69

Technical description and composition of the ERISSON 32LES69 TV, panel type and applicable modules. The composition of the modules.
ERISSON LED
Model: 32LES69
Chassis / Version: 5800-A8M57A-OP20
Panel: ST3151A05-5 SDL320HY (CD0-605) (02)
LED driver (backlight): integrated into MainBoard
PWM LED driver: TPS61196
Power Supply (PSU): integrated into MainBoard
PWM Power: TEA1733P
MainBoard: 5800-A8M57A-OP20 VER00.02
IC MainBoard: Flash: EON EN25F10, Eeprom: GD25Q32
Specifications 32LES69
ERISSON 32LES69
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The ERISSON 32LES69 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
The malfunction in such cases should be sought in the elements of the power source - the AC / DC converter, which is located on the MainBoard 5800-A8M57A-OP20 main board. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In the event of a breakdown 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 main fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key may be PWM (PWM) TEA1733P. It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 5800-A8M57A-OP20 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 must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - Flash: EON EN25F10, Eeprom: GD25Q32 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.
Owners and users of the ERISSON 32LES69 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  ----------->  EEPROM ERISSON 32LES69, Main: 5800-A8M57A-OP20 VER00.02, Panel: ST3151A05-5 SDL320HY (CD0-605)(02)



To reduce the backlight current in LED drivers with a TPS61196 controller, it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (ISET) to the housing. The maximum current in each of the six channels (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 3992 * 1.229V / Rset. In channels connected in parallel, the currents add up.


Repair MainBoard
The appearance of the MainBoard 5800-A8M57A-OP20 is shown in the figure below:
5800-A8M57A-OP20
5800-A8M57A-OP20 can be used in TVs:
ERISSON 40LES73 (Panel V400HJ6-PE1 Full HD), ERISSON 32LES73 (Panel ST3151A05-5 (SDL320HY)), ERISSON 32LES65 (Panel RDL320HY (AD0-301)), ERISSON 39LES65 (Panel RDL390HY (T390XVN01.0 39T11-C02)), ERISSON 29LES65 (Panel SK28M31A (L)), ERISSON 32LES69 (Panel ST3151A05-5 SDL320HY (CD0-605)(02)), ERISSON 40LES69 (Panel V400HJ6-PE1 Rev.C1).
Main features of the ERISSON 32LES69 device:
Installed matrix (LED panel) ST3151A05-5 SDL320HY (CD0-605) (02).
To power the backlight LEDs, a converter is used, combined with the main board 5800-A8M57A-OP20, controlled by the TPS61196 PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using TEA1733P microcircuits.
MainBoard - the main board (motherboard) is a 5800-A8M57A-OP20 module, using Flash chips: EON EN25F10, Eeprom: GD25Q32 and others.
Trademark: ERISSON, Model: 32LES69.
Briefly from the TV: LCD, 720p HD, 32 "(81 cm) diagonal, HDMI: 2, USB: 2, DVB-T2 support, backlight type: Edge LED.
The composition includes MainBoard 5800-A8M57A-OP20 VER00.02 and LCD panel (matrix) ST3151A05-5 SDL320HY (CD0-605) (02). The power supply is combined with the MainBoard.
TV ERISSON 32LES69 with LCD display ST3151A05-5, diagonal size 32 "(81 cm) 16: 9 format. The required brightness of the screen 230 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. Edge LED backlighting is realized in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in an analog system . Ah PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, 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), AV, component, VGA, HDMI x2, 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, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-T2 standards.
Overall dimensions: With a support 897x597x230 mm, Without a support 737x438x89 mm.
Attention! The panel ST3151A05-5 SDL320HY (CD0-605) (02) of the ERISSON 32LES69 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 06:33
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