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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Monday 9 March 2020

REPAIR / SERVICING TV SONY KDL-42W828B

Technical description and composition of the SONY KDL-42W828B TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-42W828B
Panel: T420HVJ02.0
LED backlight: 74.42T31.002-0-DX1 - T42-40-R, T42-40-L
T-CON: 42T34-C00 T420HVN06.2 CTRL BD
LED driver (backlight): 14STM4250AD-6S01 REV: 0.1
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) BAX L
IC MainBoard: CPU: X-Reality PRO CXD4748GB, H5TQ4G83AFR, Nand: TC58NVG3SOFTAIO
Tuner: 1-889-203-12 173457512 (TUS)
Control: IR 1-889-245-11, Wi-fi: J20H07
Technical Specifications KDL-42W828B
SONY KDL-42W828B
General repair guidelines for TV LCD LED
Possible malfunctions
- SONY KDL-42W828B does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
Most often, with such manifestations, the main power module, the ACDP-120E02 adapter, turns out to be faulty.
The owner of a TV can purchase an external power supply unit such as ACDP-120E02 and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. In the absence of a voltage of 19.5V, it is first necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
It should be remembered that in the event of breakdowns of semiconductors in the 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 chip can also cause a malfunction of the power switch of the converter and is 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.
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 indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: X-Reality PRO CXD4748GB, H5TQ4G83AFR, Nand: TC58NVG3SOFTAIO. Defective components should be replaced.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the tuner 1-889-203-12 173457512 (TUS). It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
We recommend the owners of the KDL-42W828B TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!

1. 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.


2. Service Manual 30 pages of 2014 for  the model  ---------------------------->   KDL-32W700B, KDL-40W607B, KDL-40W580B, KDL-40W609B, KDL-40W700C, KDL-48W730C, KDL-40W590B, KDL-42W700B, KDL-42W800B, KDL-48W580B, KDL-40W600B, KDL-48W590B, KDL-40W600B, KDL-48W600B, KDL-40W605B, KDL-48W605B, KDL-48W607B, KDL-48W609B, KDL-48W700C, KDL-50W700B, KDL-50W790B, KDL-50W800B, KDL-50W805B, KDL-32W700C, KDL-55W700B, KDL-55W790B, KDL-55W800B, KDL-55W807B, KDL-55W950B, KDL-55W955B, KDL-55W957B, KDL-60W605B, KDL-60W607B, KDL-60W610B, KDL-60W630B, KDL-60W840B, KDL-60W850B, KDL-60W855B, KDL-60W857B, KDL-65W950B, KDL-65W955B, KDL-70W830B, KDL-70W840B, KDL-70W850B, KDL-70W855B, KDL-70W856B, KDL-70W857B, KDL-43W780C, KDL-42W815B, KDL-42W817B, KDL-42W828B, KDL-48WM15B, KDL-60WM15B, KDL-55X830B, XBR-85X955B, KDL-65X830B, XBR-85X957B, KDL-70X830B, XBR-49X850B, XBR-49X855B, XBR-55X800B, XBR-55X850B, XBR-55X855B, XBR-55X900B, XBR-55X905B, XBR-65X800B, XBR-65X850B, XBR-65X855B, XBR-65X857B, XBR-65X900B, XBR-65X905B, XBR-65X907B, XBR-65X950B, XBR-65X955B, XBR-70X850B, XBR-70X855B, XBR-79X900B, XBR-79X905B, XBR-79X907B, XBR-85X950B, XBR-85X955B, KD-49X8500B, KD-65X9500B, KD-70X8500B, KD-55X8500B, KD-75S9000B, KD-79X9000B, KD-85X9500B, KD-65S9000B, KD-65X8500B, KD-49X8500B, KD-55X8000B, KD-55X8500B, KD-55X9200B, KD-65X8500B, KD-55X9000B, KD-65X9200B, KD-65S9000B, KD-65X9500B, KD-65S9000B, KD-65X9500B, KD-65X8000B, KD-70X8500B, KD-70X8500B, KD-75S9000B, KD-79X9000B, KD-85X9500B, KD-49X8505B, KD-55X8505B, KD-55X9005B, KD-65S9005B, KD-65X8505B, KD-65X9005B, KD-65X9505B, KD-70X8505B, KD-75S9005B, KD-79X9005B, KD-85X9505B.

 

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-42W828B:
The matrix (LED panel) T420HVJ02.0 is installed.
The matrix control uses the Timing Controller (T-CON) 42T34-C00.
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-42W828B 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 1-889-203-12 173457512 (TUS) provides the reception of television programs and tuning to channels.


Posted By: FRANK at 04:05
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