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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday, 6 March 2020

REPAIR / SERVICING TV SONY KDL-24EX320

Technical description and composition of the SONY KDL-24EX320 TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-24EX320
Chassis / Version: AZ2W
Panel: T240HW01 V.0
LED backlight: Edge LED
T-CON: T240HW01 V0 CTRL BD
LED driver (backlight): integrated into PSU
Power Supply (PSU): PSC10343E M
PWM Power: SSC1D310, SI-8205NHD
MOSFET Power: STP10NK80ZFP
MainBoard: 1-884-135-11 SOWXG 22_ATR_MB 48.72U01.021
IC MainBoard: CXD4727GB, SIL9287BCNU, GL850G, H5TQ2G63BFR, TPS54425
Technical Specifications KDL-24EX320
SONY KDL-24EX320
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-24EX320 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
Most likely in this case, the main switching power supply (IIPS) PSC10343E is faulty. It is necessary to measure its output voltages and, if they are absent, check the serviceability of power switches (STP10NK80ZFP) and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips SSC1D310, SI-8205NHD are usually checked by replacing with new, or obviously working.
- There is no image, the screen is black, there is sound, with external illumination of the screen, you can sometimes see faint outlines of the image.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED driver).
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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 1-884-135-11 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). When repairing an MB board, you need to check its components CXD4727GB, SIL9287BCNU, GL850G, H5TQ2G63BFR, TPS54425. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Owners and users of the SONY KDL-24EX320 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!
Schematic / Service manual ----------->  SONY KDL-22EX320 , KDL-22EX325, KDL-24EX320, KDL-24EX325, KDL-26EX320, KDL-26EX321, KDL-26EX325, KDL-32EX421, KDL-32EX425, KDL-32EX523, KDL-32EX524, KDL-32EX525, KDL-37EX521, KDL-37EX524, KDL-37EX525, KDL-40EX520, KDL-40EX521, KDL-40EX523, KDL-40EX524, KDL-40EX525, KDL-46EX520, KDL-46EX521, KDL-46EX524, KDL-46EX525 Chassis AZ2W


 The appearance of MainBoard 1-884-135-11 is shown in the figure below:
1-884-135-11
The appearance of the power supply
Main features of the device SONY KDL-24EX320:
Installed matrix (LED-panel) T240HW01 V.0.
The matrix control uses the Timing Controller (T-CON) T240HW01.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SONY KDL-24EX320 TV are generated by the PSC10343E power module or its analogs using SSC1D310, SI-8205NHD microcircuits and power switches of the STP10NK80ZFP type.
MainBoard - the main board (motherboard) is a module 1-884-135-11, using microchips CXD4727GB, SIL9287BCNU, GL850G, H5TQ2G63BFR, TPS54425 and others.
Posted By: FRANK at 01:51
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