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, 10 March 2020

REPAIR / SERVICING TV SONY KDL-50W817B

Technical description and composition of the SONY KDL-50W817B TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-50W817B
Panel: T500HVF04.1
LED backlight: 74.50T21.001-1-DX1 LB50016 V3_R / V2_L
T-CON: T500HVN08.0 CTRL BD 50T20-C00
LED driver (backlight): 14STM4250AD-6S01 REV1.0
PWM LED driver: BD9422EF
MOSFET LED driver: SBR10150CT, TPC8127
Power Supply (PSU): ACDP-120E02 Adapter 19.5V 6.2A
MainBoard: 1-889-202-22 (173457422)
IC MainBoard: CPU: X-Reality PRO CXD4748GB, H5TQ4G83AFR, Nand: TC58NVG3SOFTAIO
Tuner: 1-889-203-13 (173457513)
Control: IR: 1-889-245-31 (173459931), Wi-fi: J20H076
Technical Specifications KDL-50W817B
SONY KDL-50W817B
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KDL-50W817B does not turn on, the indicators on the front panel do not light up and do not blink. The TV does not respond to the control buttons and the remote control.
With such manifestations in most cases, the power module - Adapter ACDP-120E02 is faulty.
The external ACDP-120E02 Adapter 19.5V 6.2A power supply is not always subject to repair, especially since the owner of the TV can purchase it himself. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure 19.5V at the output, and in case of absence, check the health of the power switches of the converters and rectifier diodes for a possible breakdown (short circuit).
During thermal and avalanche breakdowns of semiconductors in secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback.
The PWM regulator chip (PWM) can also cause a malfunction of the power switch of the converter and is checked by replacing it with a known good one.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 1-889-202-22 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: X-Reality PRO CXD4748GB, H5TQ4G83AFR, Nand: TC58NVG3SOFTAIO requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the tuner 1-889-203-13 (173457513) power supply voltage and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners and users of the SONY KDL-50W817B 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!

Service Manual 48 pages of 2014 for the models -------------------> KDL-32W700B, KDL-42W700B, KDL-42W800B, KDL-50W700B, KDL-55W790B, KDL-32W705B, KDL-42W705B, KDL-42W805B, KDL-50W790B, KDL-55W800B, KDL-32W706B, KDL-42W706B, KDL-42W807B, KDL-50W800B, KDL-55W805B, KDL-32W707B, KDL-42W707B, KDL-42W815B, KDL-50W805B, KDL-55W808B, KDL-42W817B, KDL-50W807B, KDL-55W815B, KDL-42W828B, KDL-50W808B, KDL-55W817B, KDL-42W829B, KDL-50W815B, KDL-55W828B, KDL-50W817B, KDL-55W829B, KDL-50W828B, KDL-55W855B, KDL-50W829B, KDL-55W857B.


The appearance of MainBoard 1-889-202-22 is shown in the figure below:
1-889-202-22
1-889-202-22 can be used in TVs:
SONY KDL-42W817B (Panel T420HVJ02.1), SONY KDL-42W706B KDL-42W706W (Panel T420HVF06.1), SONY KDL-40W605B (Panel NS4S400DND01 4-528-221-02), SONY KDL-42W705B (Panel T420HVF06.0 xxxxG), SONY KDL-50W817B (Panel T500HVF04.1), SONY KDL-42W828B (Panel T420HVJ02.0), SONY KDL-48W605B (Panel LSY480HN01-001), SONY KDL-32W706B (Panel T320HVF04.1 ).
The appearance of the power supply
Main features of the device SONY KDL-50W817B:
The matrix (LED panel) T500HVF04.1 is installed.
The matrix control uses the Timing Controller (T-CON) T500HVN08.0.
The LED driver 14STM4250AD-6S01 is used to power the backlight LEDs, it is controlled by the BD9422EF PWM controller. As power elements of the LED driver, keys of the type SBR10150CT, TPC8127 are used.
To power all the internal components of the SONY KDL-50W817B TV, an external source such as ACDP-120E02 Adapter 19.5V 6.2A is used.
MainBoard - the main board (motherboard) is a 1-889-202-22 module, using CPU chips: X-Reality PRO CXD4748GB, H5TQ4G83AFR, Nand: TC58NVG3SOFTAIO and others.
The tuner 1-889-203-13 (173457513) provides the reception of television programs and tuning to channels.

SONY KDL-50W817B TV with T500HVF04.1 LCD, 50 "(127 cm) diagonal size in 16: 9 format. This model uses side illumination from Edge LEDs.
There is support for 3D images with active (shutter) technology for separating the right and left channels.
The T500HVF04.1 panel and the motherboard software 1-889-202-22 provide for viewing HD and Full HD images at a resolution of 1920x1080 pixels in a graphical decomposition according to the 1080p standard (Full HD).
The KDL-50W817B is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and image formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Video processor supported media file formats: MP3, WMA, MPEG4, Xvid, MKV, JPEG.
The power of the sound speaker system 20 W (2x10 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, audio x2, component, SCART, HDMI x4, MHL, USB x3, Ethernet (RJ-45), Wi-Fi. An output for connecting headphones is provided. To connect an analog computer or laptop to this TV model, a VGA (D-Sub 15) connector is used, which supports resolutions: 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
The power consumed by the TV in the operating mode from the network is 157 watts.
Overall dimensions: with stand 1116x693x176 mm, without stand 1116x656x64 mm.
TV Weight: with stand: 20.7 kg, without stand: 18.4 kg.
Attention! The T500HVF04.1 panel of the SONY KDL-50W817B LED TV is its most expensive element.
Avoid hitting the glass and excessive pressure on the screen surface to avoid damage to the LED panel!
It is unsafe to get any liquid on the screen. Sometimes one drop of water is enough, if it flows down the glass onto the cables, the TV can become unrepairable.

Posted By: FRANK at 02:07
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