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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Friday, 6 March 2020

REPAIR / SERVICING TV SONY KDL-26S2000

Technical description and composition of the TV SONY KDL-26S2000, type of panel and applicable modules. The composition of the modules.
SONY
Model: KDL-26S2000
Chassis / Version: WAX2
Panel: LTY260W2-L16
T-CON: 260W3C4LV2.4
Inverter (backlight): PCB2680 A06-126290 F
Power Supply (PSU): APS-220 1-869-132-31 1-468-980-12 APS-220 (CH)
PWM Power: MIP2H2, FA5501AN (PFC), CXD9841M
MainBoard: 1-869-852-21 (172723121) + 1-869-850-25 (172723025) + 1-869-656-21 (172714521)
IC MainBoard: CXD0709GB, CXD9816AGG, CXD2097BQ, HTC63LVD1023, SIL9011CTV, SAA7115AHL, HY27US08281A
Tuner: BTD-HF431Z 1-869-657-12 (172714612)
Technical Specifications KDL-26S2000
SONY KDL-26S2000
General recommendations for repairing TV LCD
Possible malfunctions
- SONY KDL-26S2000 does not turn on, the indicators on the front panel do not light and do not blink. The TV does not respond to the control buttons and the remote control.
With such manifestations, a malfunction is most likely to be detected in the APS-220 power module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown. The operation of the standby converter assembled on the MIP2H2 PWM controller must be checked in the first place.
The operability of the PFC unit can be indirectly judged by the presence of an increased voltage (380-40V) in operating mode on the electrolytic capacitor of the filter of the rectifier network.
It should be remembered that during breakdowns of semiconductors in secondary circuits, converters 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.
PWM chips MIP2H2, FA5501AN (PFC), CXD9841M are checked by replacing with working ones.
- There is no image, but there is sound, it responds to the remote. Or the image appears when you turn it on and immediately disappears
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required when working, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-869-852-21 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - CXD0709GB, CXD9816AGG, CXD2097BQ, HTC63LVD1023, SIL9011CTV, SAA7115AHL, HY27US08281A. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
Before replacing the tuner BTD-HF431Z 1-869-657-12 (172714612), if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the SONY KDL-26S2000 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!
PSU  schematic diagram ------------------->   Sony APS-220 Power supply


 The appearance of MainBoard 1-869-852-21 is shown in the figure below:
1-869-852-21
1-869-852-21 can be used in televisions:
SONY KDL-40V2000 (Panel LTZ400WS-LH2), SONY KDL-46S2030 (Panel LTY460WS-L04), SONY KDL-46V2000 (Panel 46 " 720p HD (1366x720)), SONY KDL-26S2000 (Panel LTY260W2-L16).
The appearance of the power supply
Main features of the device SONY KDL-26S2000:
Installed matrix (LCD panel) LTY260W2-L16.
The matrix control uses the Timing Controller (T-CON) 260W3C4LV2.4.
A PCB2680 inverter is used to power the backlight.
The necessary supply voltages for all nodes of the SONY KDL-26S2000 TV are generated by the APS-220 power supply module or its analogs using microchips MIP2H2, FA5501AN (PFC), CXD9841M.
MainBoard - the main board (motherboard) is a module 1-869-852-21, using microchips CXD0709GB, CXD9816AGG, CXD2097BQ, HTC63LVD1023, SIL9011CTV, SAA7115AHL, HY27US08281A and others.
The tuner BTD-HF431Z 1-869-657-12 (172714612) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY260W2-L16
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Active Area: 575.769x323.712 mm
Frequency: 60Hz
Lamp Type: CCFL
Posted By: FRANK at 02:20
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