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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Sunday, 22 December 2019

REPAIRING / SERVICING TV SAMSUNG LE26C454

Technical description and composition of the SAMSUNG LE26C454 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE26C454 LE26C454E3W
Chassis / Version: N82A
Panel: LTF260AP04
T-CON: 26AP04S4LV0.3
Inverter (backlight): SSI260_4UC01
Power Supply (PSU): BN44-00338B P2632HD_ADY
PWM Power: ICE3BR1765J (Stb), FAN7530 (PFC), FSFR1700US
MOSFET Power: 13N60N, MDS1653
MainBoard: BN41-01536A
IC MainBoard: WT61P802, SEMS18 1027B-LF, 24C256, NTP-7300S
Tuner: BN40-00173A
Technical Specifications LE26C454
SAMSUNG LE26C454
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE26C454 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Often in such cases, the BN44-00338B power module is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (13N60N, MDS1653) and rectifier diodes of the converters for possible short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) ICE3BR1765J (Stb), FAN7530 (PFC), FSFR1700US, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
A 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 of the inverter, the breakdown keys and the transformer secondary windings must be ringed in its converter.
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 operations, 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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-01536A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace 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 elements WT61P802, SEMS18 1027B-LF, 24C256, NTP-7300S. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the tuner BN40-00173A, if there is no tuning to the channels, you must first check the software and supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
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 to professionals with sufficient experience in the repair of electronic equipment.


The appearance of the MainBoard BN41-01536A is shown in the figure below:
BN41-01536A
BN41-01536A can be used in TVs:
SAMSUNG LE37C530F1W (Panel T370HW03 VG xxxxG), SAMSUNG LE37C550J1W (Panel T730HW03), SAMSUNG LE32C454 LE32C454E3W (Panel LTF320AP08), SAMSUNG LE26C454 LE26C454E36004 Panel.
The appearance of the power supply
Main features of the SAMSUNG LE26C454 device:
Installed matrix (LCD panel) LTF260AP04.
The matrix control uses the Timing Controller (T-CON) 26AP04S4LV0.3.
The inverter SSI260_4UC01 is used to power the backlight.
The necessary supply voltages for all nodes of the TV SAMSUNG LE26C454 are generated by the power module BN44-00338B, or its analogs using ICE3BR1765J (Stb), FAN7530 (PFC), FSFR1700US and power switches type 13N60N, MDS1653.
MainBoard - the main board (motherboard) is a BN41-01536A module, using microchips WT61P802, SEMS18 1027B-LF, 24C256, NTP-7300S and others.
The tuner BN40-00173A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:05
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