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 UE48H5203AK

Technical description and composition of the SAMSUNG UE48H5203AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE48H5203AK UE48H5203
Panel: CY-HH048BGLV1V
T-CON: BN41-02111A BN97-07971C
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00757A L48G0B_ESM PSLF970G06A
MainBoard: BN41-02253B BN94-08404N
IC MainBoard: EEPROM: 24C256, DRAM: K4B2G1646Q; DRAM: K4B2G1646Q, SPI Flash: 25Q40
Tuner: BN40-00287A DNTQ403IL286A
Technical Specifications UE48H5203
SAMSUNG UE48H5203AK
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SAMSUNG UE48H5203AK TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, the BN44-00757A power module usually fails. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- 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.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the BN41-02253B 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements EEPROM: 24C256, DRAM: K4B2G1646Q; DRAM: K4B2G1646Q, SPI Flash: 25Q40. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the tuner BN40-00287A DNTQ403IL286A, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
We recommend the owners of the UE48H5203AK TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!


SAMSUNG UE48H5203AK, VER: ES01, MAIN BN41-02253A, SPI FLASH 25Q40, EEPROM: 24C256, PSU: BN44-00757A, PANEL: CY-HH048BGEV1V, T-CON: HV480FH2-600

FIRMWARE FOR EEPROM, SPI FLASH ----------------> SAMSUNG UE48H5203AK UE48H5203 , Main: BN41-02253A, Panel: CY-HH048BGEV1V


The appearance of the MainBoard BN41-02253B is shown in the figure below:
BN41-02253B
BN41-02253B can be used in TVs:
SAMSUNG UE48H5203AK UE48H5203 (Panel CY-HH048BGLV1V), SAMSUNG UE40H5203AK UE40H5203 (Panel V400HJ6-PE1 CY-HH040BGNV1V).
The appearance of the power supply
Main features of the SAMSUNG UE48H5203AK device:
Installed matrix (LED panel) CY-HH048BGLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02111A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE48H5203AK TV is carried out by the BN44-00757A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02253B module, using EEPROM chips: 24C256, DRAM: K4B2G1646Q; DRAM: K4B2G1646Q, SPI Flash: 25Q40 and others.
The tuner BN40-00287A DNTQ403IL286A provides the reception of television programs and tuning to channels.

Posted By: FRANK at 07:07
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