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-40X2000

Technical description and composition of the TV SONY KDL-40X2000, type of panel and applicable modules. The composition of the modules.
SONY
Model: KDL-40X2000
Chassis / Version: FIX
Panel: LTY400HS-LH2
T-CON: 400H1C4LV1.3
Inverter (backlight): 1-869-946-12 & 1-869-961-04
Power Supply (PSU): 1-869-945-12 - A1217644A
PWM Power: CXD9841P, MIP2H2
MainBoard: 1-873-983-11
IC MainBoard: CPU: NEC D61123F1 100; Nand: HY27USO8281A, Scaler: SI19151CLU
Tuner: 1-873-956-11 BTD-HF401Z (01)
Control: IR: 1-870-673-11 - 172757211 - A-1171-667-A
Specifications KDL-40X2000
SONY KDL-40X2000
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KDL-40X2000 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With similar manifestations, in some cases, the power module 1-869-945-12 is faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of any breakdown 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.
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. PWM controllers (PWM) CXD9841P, MIP2H2, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-873-983-11 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: NEC D61123F1 100; Nand: HY27USO8281A, Scaler: SI19151CLU 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.
Tuner malfunction 1-873-956-11 BTD-HF401Z (01) is installed after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention TV owners! Self-repair attempts by SONY KDL-40X2000 are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / Schematic DIagram ------------------>   SONY KDL-40X2000 Chassis FIX


 The appearance of MainBoard 1-873-983-11 is shown in the figure below:
1-873-983-11
1-873-983-11 can be used in televisions:
SONY KDL-40X3500 (Panel LTY400HC01), SONY KDL-46X3500 (Panel LTY460HH-LH2), SONY KDL-52X3500 (Panel LTZ520HC01), SONY KLV-46X350A (Panel LTY460HH-LH2), SONY KDL-46X3000 (Panel LTY460HH-LH2).
The appearance of the power supply
Main features of the device SONY KDL-40X2000:
Installed matrix (LCD-panel) LTY400HS-LH2.
The matrix control uses the Timing Controller (T-CON) 400H1C4LV1.3.
An inverter 1-869-946-12 is used to power the backlight.
The formation of the necessary supply voltages for all nodes of the SONY KDL-40X2000 TV is carried out by the power module 1-869-945-12, or its analogs using microcircuits CXD9841P, MIP2H2.
MainBoard - the main board (motherboard) is a module 1-873-983-11, using CPU chips: NEC D61123F1 100; Nand: HY27USO8281A, Scaler: SI19151CLU and others.
Tuner 1-873-956-11 BTD-HF401Z (01) provides the reception of television programs and tuning to channels.
Posted By: FRANK at 03:01
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