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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Wednesday 11 March 2020

REPAIR / SERVICING TV SONY KLV-46X350A

Technical description and composition of the TV SONY KLV-46X350A, type of panel and applicable modules. The composition of the modules.
SONY
Model: KLV-46X350A
Chassis / Version: FIX2
Panel: LTY460HH-LH2
Inverter (backlight): DF2 A-1253-585-D
Power Supply (PSU): 1-873-813-14 (1-873-813-13) GF1
PWM Power: L6562 (PFC), CXD9841P, MIP2H2
MainBoard: 1-873-983-11 FB2 Board + AG Board
IC MainBoard: IC9400: CXD4716AGB, (IC4800: CXD3816GB DRC-MF V2.5, IC5401: MB91305
Tuner: 7D05DD - TUG Board
Appearance
SONY KLV-46X350A
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KLV-46X350A TV does not turn on at all, there is no reaction to the remote control and to the control buttons from the front panel. Indicator lights do not light or flash.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module 1-873-813-14. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches and rectifier diodes in the PFC converters, the main source, as well as the standby mode for possible short circuit.
During avalanche and thermal breakdowns of diodes in the secondary circuits, the converter can operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks, sometimes the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can cause it to break, for example, disable it in key mode, or create 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) L6562 (PFC), CXD9841P, MIP2H2, which are usually checked by replacing with new or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- 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 motherboard 1-873-983-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Inspection or replacement of components IC9400: CXD4716AGB, (IC4800: CXD3816GB DRC-MF V2.5, IC5401: MB91305 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the heating method.
Attention TV owners! Self-repair attempts by SONY KLV-46X350A are not recommended by the manufacturer and can lead to serious negative consequences!
Service / Schematic  manual ----------------->   Sony KLV-40X300A, KLV-46X300A, KLV-52X300A, KLV-40X350A, KLV-46X350A, KLV-52X350A 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 KLV-46X350A:
Installed matrix (LCD panel) LTY460HH-LH2.
To power the backlight used inverter DF2.
The necessary supply voltages for all nodes of the SONY KLV-46X350A 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 IC9400: CXD4716AGB, (IC4800: CXD3816GB DRC-MF V2.5, IC5401: MB91305 and others.
Tuner 7D05DD - TUG Board 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 02:30
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