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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Tuesday, 10 March 2020

REPAIR / SERVICING TV SONY KDL-55X4500

Technical description and composition of the SONY KDL-55X4500 TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KDL-55X4500
Chassis / Version: EG1H
Panel: LTY550HF01-001
T-CON: 550HHC6LV0.7; LMU4148T1, K4D263238I-UC50, TPS65367A
Power Supply (PSU): 1-877-271-12 A1552103B & 1-877-272-11 A1552105A & 1-877-581-11 A1553201A
PWM Power: MM3313AF, MIP2H2, CXD9841P
MainBoard: 1-877-329-11 A1557913E A1557909E
IC MainBoard: RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU
Tuner: Y1008480A
Technical Specifications KDL-55X4500
SONY KDL-55X4500
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KDL-55X4500 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, the power module 1-877-271-12 usually fails. First of all, you should check the operation of the standby power converter assembled on the MIP2H2 PWM controller. In case of its serviceability, it is necessary to measure the output voltage of the operating mode, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for possible breakdown (short circuit).
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, powering the PWM chip, frequency setting, damper, and also elements of the Negative Stabilization Feedback.
PWM microcircuits (PWM) MM3313AF, MIP2H2, CXD9841P are checked by replacing with new or obviously working ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned 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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
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 they are finished, 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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 1-877-329-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If you suspect a malfunction of the Y1008480A tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention! For users and owners of KDL-55X4500 TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.

Service manual / schematic diagram ----------->   Sony KDL-40/46/55X4500 chassis EG1H

Service manual / schematic diagram ----------->   Sony 1-877-271-12 G6 board Power supply

 Service Manual 133 pages of 2008 for models: ---->  KDL-40X4500, KDL-46X4500, KDL-55X4500


 The appearance of MainBoard 1-877-329-11 is shown in the figure below:
1-877-329-11
1-877-329-11 can be used in TVs:
SONY KDL-40X4500 (Panel LTY400HC02 001), SONY KDL-55X4500 (Panel LTY550HF01-001).
The appearance of the power supply
Main features of the device SONY KDL-55X4500:
Installed matrix (LCD panel) LTY550HF01-001.
The matrix control uses the Timing Controller (T-CON) 550HHC6LV0.7 ;.
The formation of the necessary supply voltages for all nodes of the SONY KDL-55X4500 TV is carried out by the power module 1-877-271-12, or its analogs using microcircuits MM3313AF, MIP2H2, CXD9841P.
MainBoard - the main board (motherboard) is a module 1-877-329-11, using the RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU and other microcircuits.
The Y1008480A tuner provides TV reception and channel tuning.
Posted By: FRANK at 03:20
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