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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Monday 9 March 2020

REPAIR / SERVICING TV SONY KDL-40Z5800

Technical description and composition of the TV SONY KDL-40Z5800, type of panel and applicable modules. The composition of the modules.
SONY
Model: KDL-40Z5800
Panel: LTY400HG02
T-CON: 1-878-791-11 A2693A9F096N-1653-703-CT2
Inverter (backlight): 1-878-621-12 (Master, Slave)
PWM Inverter: BD9897
Power Supply (PSU): 1-878-688-11 M1709327A G6N 1709-327
PWM Power: CXD9969P, MIP2H2
MainBoard: 1-878-942-31 1701-876-BA (1-878-942-41 Y2008640D A-1701-876-A)
Control: RM-ED019
Technical Specifications KDL-40Z5800
SONY KDL-40Z5800
General recommendations for repairing TV LCD
Repair of the SONY KDL-40Z5800 TV should begin with a careful external examination of all its components and modules. A visible physical change in some components can sometimes suggest a further troubleshooting direction. If ring cracks are detected in the soldered terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the SONY KDL-40Z5800 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power supply module 1-878-688-11 M1709327A G6N-1709-327 malfunctioning. In some cases, only the processor power regulator may be faulty. 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. PWM chip CXD9996SP, MIP2H2 from the manufacturer is possible.
If the SONY KDL-40Z5800 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
In cases of attempts to repair the motherboard 1-878-942-31 1701-876-BA (1-878-942-41 Y2008640D A-1701-876-A), it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible , make a software update. BGA chips can sometimes be diagnosed with local heating.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
PSU  / Schematic Diagram ------------------>   Sony 1-878-688-11 G6N board Power supply



 The appearance of MainBoard 1-878-942-31 is shown in the figure below:
1-878-942-31
1-878-942-31 can be used in TVs:
SONY KDL-37V5800 (Panel T370HW02), SONY KDL-40Z5800 (Panel LTY400HG02).
The appearance of the power supply
Main features of the device SONY KDL-40Z5800:
Installed matrix (LCD-panel) LTY400HG02.
The matrix control uses the Timing Controller (T-CON) 1-878-791-11.
An inverter 1-878-621-12 is used to power the backlight lamps, it is controlled by the BD9897 PWM controller.
The formation of the necessary supply voltages for all nodes of the SONY KDL-40Z5800 TV is carried out by the power module 1-878-688-11, or its analogs using microcircuits CXD9969P, MIP2H2.
MainBoard - the main board (motherboard) is a module 1-878-942-31.
Information from an alternative source:
SONY KDL-40Z5800
Panel Type (Matrix): LTY400HG02
Motherboard: 1-878-942-31-1701-876-BA (1-878-942-41 Y2008640D A-1701-876-A)
T-con: 1-878-791-11 A2693A9F096N-1653-703-CT2, FREESAT DECODER: 1-880-804-11 (173132911), 1739-152-TUS-1742-442
Inverter: 1-878-621-12 (173045512), 1663-188-D D2N-1663-188, BD9897
Inverter: 1-878-620-12 (173045512), 1663-184-D D1N-1663-184
PSU: 1-878-688-11 M1709327A G6N-1709-327, CXD9996SP, MIP2H2
Remote control: RM-ED019
Posted By: FRANK at 03:34
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