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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Saturday, 7 March 2020

REPAIR / SERVICING TV SONY KDL-40R353B

Technical description and composition of the SONY KDL-40R353B TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-40R353B
Chassis / Version: EG1L
Panel: NS4S400DND11
LED backlight: 2013SONY40A, 2013SONY40A - 3228
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): ACDP-060E01 Adapter 19.5V 3.05A
MainBoard: 1-893-413-12 - 173503912 BIL2 board
Control: IR: 1-893-522-21 173510621
Technical Specifications KDL-40R353B
SONY KDL-40R353B
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-40R353B TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In the vast majority of such cases, a malfunction is detected in the ACDP-060E01 Adapter power module.
The owner of a TV can purchase an external power supply unit such as ACDP-060E01 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. It is necessary to measure the voltage 19.5V at the output of the adapter, and in case of its absence, check the operability of the power switches of the converter and rectifier diodes for a possible breakdown (short circuit).
During thermal or avalanche breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels using 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 lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 1-893-413-12 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).

We recommend the owners of the KDL-40R353B 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!


The appearance of MainBoard 1-893-413-12 is shown in the figure below:
1-893-413-12
The appearance of the power supply
Main features of the device SONY KDL-40R353B:
Installed matrix (LED panel) NS4S400DND11.
To power the backlight LEDs, a converter is used, combined with the main board 1-893-413-12.
To power all the internal components of the SONY KDL-40R353B TV, an external source such as ACDP-060E01 Adapter 19.5V 3.05A is used.
MainBoard - the main board (motherboard) is a module 1-893-413-12.

Posted By: FRANK at 02:38
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