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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Saturday 18 January 2020

REPAIR / SERVICING TV SAMSUNG UE48H6400AK

Technical description and composition of the SAMSUNG UE48H6400AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE48H6400AK UE48H6400
Chassis / Version: TS01
Panel: CY-GH048CSLV2V
T-CON: BN41-02110A LSF480HJ01
LED driver (backlight): integrated into PSU
PWM LED driver: 7014X
Power Supply (PSU): BN44-00709A L48X1T_ESM
PWM Power: S3051 (PFC), FA6A01N (FA5760N)
MainBoard: BN41-02156A BN94-07309V
IC MainBoard: CPU: SEMS-31, SPI-FLASH: 25Q40, EEPROM: 24C512
Tuner: BN40-00288A
Technical Specifications UE48H6400
SAMSUNG UE48H6400AK
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SAMSUNG UE48H6400AK TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In such cases, the fault should be sought first in the BN44-00709A power supply module. We recommend measuring its output voltages and, in case of their absence or greatly underestimated values, it is necessary to check the serviceability of power switches and rectifier diodes of converters for probable short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, elements supplying a PWM controller, frequency-setting, damper, and also elements of the Negative Stabilization Feedback. PWM chips S3051 (PFC), FA6A01N (FA5760N) are usually checked by replacing with new ones, or obviously working.
- 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.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02156A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: SEMS-31, SPI-FLASH: 25Q40, EEPROM: 24C512 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before changing the tuner BN40-00288A, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of a SAMSUNG UE48H6400AK TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!



The appearance of the MainBoard BN41-02156A is shown in the figure below:
BN41-02156A
BN41-02156A can be used in TVs:
SAMSUNG UE40H6200 UE40H6200AK (Panel CY-GH040CSLV1V), SAMSUNG UE32H5500 UE32H5500AK (Panel GH032BGA-B2), SAMSUNG UE40H5500 UE40H5500AK (Panel CY-GH040BGLV2V), SAMSUNG UE32H6200AK (Panel CY-GH032CSLV1V), SAMSUNG UE40H6350 (Panel CY-GH040CSLV2V), SAMSUNG UE32H6410AU UE32H6410 (Panel CY-GH032CSLV4V), SAMSUNG UE40H6400AK UE40H6400 (Panel CY-SH040CSL V2H), SAMSUNG UE48H6200 UE48H6200AK (Panel CY-GH048CSLV1V), SAMSUNG UE48H6230AK UE48H6230 (Panel CY-GH048CSLV1V), SAMSUNG UE48H6400AK UE48H6400 (Panel CY-GH048CSLV2V), SAMSUNG UE48H6410AU UE48H6410 (Panel CY-GH048CSLV4V), SAMSUNG UE48H6240AK UE48H6240 (Panel CY-GH048CSLV1V), SAMSUNG UE32H4500AK UE32H4500 (Panel CY-HH032AGLV2V), SAMSUNG UE40H6410 UE40H6410AU (Panel CY-GH040CSLV4V), SAMSUNG UE40H6500 UE40H6500AT (Panel CY-GH040CSLV1V), SAMSUNG UE32H6230 UE32H6230AK (Panel T320HVF05.2), SAMSUNG UE32H4510 UE32H4510AK (Panel HH032AGH-R3 BN96-31086F), SAMSUNG UE32H6350 UE32H6350AK (Panel CY-GH032CSLV2V), SAMSUNG UE40H6230 UE40H6230AK (Panel CY-GH048CSLV1V).
The appearance of the power supply
Main features of the SAMSUNG UE48H6400AK device:
Installed matrix (LED panel) CY-GH048CSLV2V.
The matrix control uses the Timing Controller (T-CON) BN41-02110A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a 7014X PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE48H6400AK TV are generated by the BN44-00709A power module or its analogs using S3051 (PFC), FA6A01N (FA5760N) microcircuits.
MainBoard - the main board (motherboard) is a BN41-02156A module, using CPU chips: SEMS-31, SPI-FLASH: 25Q40, EEPROM: 24C512 and others.
The tuner BN40-00288A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:33
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