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 !

Saturday, 7 March 2020

REPAIR / SERVICING TV SONY KDL-40R453B

Technical description and composition of the SONY KDL-40R453B TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-40R453B
Chassis / Version: BIL
Panel: NS4S400DND01
LED backlight: 3228 2013SONY40A & 2013SONY40B
LED driver (backlight): with integrated MainBoard
PWM LED driver: BD9397EFV
Power Supply (PSU): Adapter 19.5V 4.35A
MainBoard: 1-889-355-13 (173463313)
IC MainBoard: CPU: MT5561TUHT, EEPROM: 24C128
Tuner: RE231ZP H 4M104F
Control: RM-ED062, IR: 1-889-677-11
Technical Specifications KDL-40R453B
SONY KDL-40R453B
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-40R453B TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In most of these cases, the main switching power supply, the Adapter, is faulty.
This TV model is equipped with an external power adapter type Adapter 19.5V 4.35A, which the owner can purchase on their own, and repairing it may not always be advisable, however, sometimes there is some reason to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltage of 19.5V and, if not, check for short-circuit probability in the converters power switches and rectifier diodes.
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 power switch usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, PWM supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback.
The PWM controller chip is checked by replacing it with a new or obviously working one.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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 1-889-355-13 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 board (SSB), you need to check the health of its elements - CPU: MT5561TUHT, EEPROM: 24C128. Defective components should be replaced.
If you suspect a malfunction of the RE231ZP H 4M104F tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary power supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Attention! For users and owners of KDL-40R453B TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.

 Service Manual 21 pages of 2014 for  the models ---------------------->  KDL-32R410B, KDL-32R413B, KDL-32R415B, KDL-32R430B, KDL-32R433B, KDL-32R435B, KDL-32R435B, KDL-40R450B, KDL-40R453B, KDL-40R455B, KDL-40R480B, KDL-40R483B, KDL-40R485B, KDL-48R483B.

Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, DVR, sound: 16W, HDMI: 2.
On the official website of Sony there is firmware (Firmware) - improved recording and playback functions from 04/09/2015.
The composition uses MainBoard 1-889-355-13 and LCD-panel NS4S400DND01.
Power supply unit external Adapter 19.5V 4.35A.

The appearance of MainBoard 1-889-355-13 is shown in the figure below:
1-889-355-13
1-889-355-13 can be used in TVs:
SONY KDL-32R413B (Panel LC320DXJ (SF)(A9)), SONY KDL-32R433B (Panel LC320DXJ (SF)(A9)), SONY KDL-40R483B (Panel NS4S400DND01), SONY KDL-40R453B (Panel NS4S400DND01).
Main features of the device SONY KDL-40R453B:
Installed matrix (LED panel) NS4S400DND01.
To power the backlight LEDs, a converter is used, combined with the main board 1-889-355-13, controlled by the BD9397EFV PWM controller.
To power all internal components of the SONY KDL-40R453B TV, an external adapter type 19.5V 4.35A is used.
MainBoard - the main board (motherboard) is a 1-889-355-13 module, using CPU chips: MT5561TUHT, EEPROM: 24C128 and others.
The RE231ZP H 4M104F tuner provides TV reception and channel tuning.

Posted By: FRANK at 06:14
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