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-46X3500

Technical description and composition of the SONY KDL-46X3500 TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KDL-46X3500
Chassis / Version: FIX2
Panel: LTY460HH-LH2
T-CON: 404652HHC8L V1.8
Inverter (backlight): LJ97-01183B - SSB460HA24-R / L - Rev0.5
Power Supply (PSU): 1-873-813-14 GF1
PWM Power: L6562 (PFC), CXD9841P, MIP2H2
MainBoard: 1-873-983-11 FB2 Board
IC MainBoard: MB91305, S29AL016D7OTFI01, CXA2240AR
Tuner: BTD-HF401Z (01) 1-873-956-11
Technical Specifications KDL-46X3500
SONY KDL-46X3500
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of the SONY KDL-46X3500 TV, like all others, with an external examination of possible changes, both external and internal elements. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Sometimes the SONY KDL-46X3500 TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
In most cases, a breakdown of the N-Fet converter key does 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. Possible defective PWM chip from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of the device for their operation.
If the SONY KDL-46X3500 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
It should be remembered! Attempts to repair the SONY KDL-46X3500 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual / schematic diagram ------------->  Sony KDL-40/46/52X3500 chassis FIX2



 The appearance of MainBoard 1-873-983-11 is shown in the figure below:
1-873-983-11
1-873-983-11 can be used in televisions:
SONY KDL-40X3500 (Panel LTY400HC01), SONY KDL-46X3500 (Panel LTY460HH-LH2), SONY KDL-52X3500 (Panel LTZ520HC01), SONY KLV-46X350A (Panel LTY460HH-LH2), SONY KDL-46X3000 (Panel LTY460HH-LH2).
The appearance of the power supply
Main features of the device SONY KDL-46X3500:
Installed matrix (LCD panel) LTY460HH-LH2.
The matrix control uses the Timing Controller (T-CON) 404652HHC8L.
To power the backlight used inverter LJ97-01183B.
The necessary supply voltages for all nodes of the SONY KDL-46X3500 TV are generated by the power module 1-873-813-14, or its analogs using L6562 (PFC), CXD9841P, MIP2H2 microcircuits.
MainBoard - the main board (motherboard) is a module 1-873-983-11, using microchips MB91305, S29AL016D7OTFI01, CXA2240AR and others.
The tuner BTD-HF401Z (01) 1-873-956-11 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY460HH-LH2
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Active Area: 1018.08x572.67 mm
Frequency: 120Hz
Lamp Type: CCFL Embedded (Balance board)
Posted By: FRANK at 08:57
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