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-40R483B

Technical description and composition of the SONY KDL-40R483B TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-40R483B
Chassis / Version: ITC3
Panel: NS4S400DND01
LED backlight: SAMSUNG 2013SONY40A / B 3228 05 REV1.0 130927
T-CON: 14Y-40FMB7S4LV0.2 LSY400HM03-A02
PWM LED driver: BD9897
Power Supply (PSU): ACDP-085N02 Adapter 19.5V 4.25A
MainBoard: BIL 1-889-355-13 // 1-889-355-12 // 1-889-355-13 // 1-889-355-11
IC MainBoard: CPU: MT5561TUHT; NAND Flash: TC58NVG1S3; EEPROM: 24C128; SOUND: YDA-179-S; DC-DC converters: RT8288 + 12V, RT8293 + 1V2, RT8295 + 3V3, RT8296 + 5V1, 001COW + 1V1, 001COW + 1V5
Tuner: RE231ZP
Control: Remote: RM-ED062, IR: 1-889-677-11 173475511
Technical Specifications KDL-40R483B
SONY KDL-40R483B
General repair guidelines for TV LCD LED
Repair of the SONY KDL-40R483B TV should begin with a diagnosis of the malfunction, which involves a careful examination of the external and internal elements of the device. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the KDL-40R483B TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
A breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If the SONY KDL-40R483B has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the 1080p Full HD Direct LED panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: MT5561TUHT; NAND Flash: TC58NVG1S3; EEPROM: 24C128; SOUND: YDA-179-S; DC-DC converters: RT8288 + 12V, RT8293 + 1V2, RT8295 + 3V3, RT8296 + 5V1, 001COW + 1V1, 001COW + 1V5. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner RE231ZP is established after checking the software and all the supply voltages at its terminals.
Attention to users! Self-repair of a SONY KDL-40R483B TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Schematic Diagram / Service manual -------------->   Sony KDL-32R410B/413B/415B/430B/433B/435, KDL-32R435B/450B/453B/455B/480B/483B/485B Chassis ITC3

 The appearance of the MainBoard BIL is shown in the figure below:
Bil
BIL can be used on TVs:
SONY KDL-32R413B (Panel LC320DXJ (SF)(A9)), SONY KDL-32R433B (Panel LC320DXJ (SF)(A9)), SONY KDL-40R483B (Panel NS4S400DND01), SONY KDL-40R353B (Panel NS4S400DND11).
The appearance of the power supply
Main features of the device SONY KDL-40R483B:
Installed matrix (LED panel) NS4S400DND01.B7S4LV0.2.
A converter controlled by the BD9897 PWM controller is used to power the backlight LEDs.
To power all the internal components of the SONY KDL-40R483B TV, an external source such as ACDP-085N02 Adapter 19.5V 4.25A is used.
MainBoard - the main board (motherboard) is a BIL module using CPU chips: MT5561TUHT; NAND Flash: TC58NVG1S3; EEPROM: 24C128; SOUND: YDA-179-S; DC-DC converters: RT8288 + 12V, RT8293 + 1V2, RT8295 + 3V3, RT8296 + 5V1, 001COW + 1V1, 001COW + 1V5 and others.
The RE231ZP tuner provides TV reception and channel tuning.
Posted By: FRANK at 06:24
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