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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Friday, 17 January 2020

REPAIR / SERVICING TV SAMSUNG UE46EH5047

Technical description and composition of the SAMSUNG UE46EH5047 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE46EH5047 UE46EH5047K
Panel: LTJ460HN05-L
LED backlight: 3535LED-72EA-R / L BN96-21479A, BN96-21480A
T-CON: BN41-01797A
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
MOSFET LED driver: MDD5N40RH
Power Supply (PSU): BN44-00497A PD46AVF_CSM
PWM Power: SPC7011F (PFC), D2011K, FSFR1700
MOSFET Power: MDF11N60TH
MainBoard: BN41-01795A BN94-05842B
IC MainBoard: WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP
Tuner: BN40-00231A DT0D40FVL084AA
Technical Specifications UE46EH5047
SAMSUNG UE46EH5047
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46EH5047 TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
With such manifestations, a malfunction is most likely to be detected in the BN44-00497A power supply module. It is necessary to measure its output voltages and, if they are absent, check the power switches (MDF11N60TH) and rectifier diodes for the probability of short circuit in the converters.
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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits (PWM) SPC7011F (PFC), D2011K, FSFR1700 are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01795A 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). When repairing an MB board, you need to check its components WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If you suspect a malfunction of the tuner BN40-00231A DT0D40FVL084AA, 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.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE46EH5047 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

The appearance of the MainBoard BN41-01795A is shown in the figure below:
BN41-01795A
BN41-01795A can be used in TVs:
SAMSUNG UE32EH4000 UE32EH4000W (Panel LTJ320AP03-L), SAMSUNG UE32EH5000W (Panel DE320BGM-C1), SAMSUNG UE26EH4000W (Panel T260XVN01.1), SAMSUNG UE32EH5007K UE32EH5007 (Panel LTJ320HN07-L), SAMSUNG UE32EH5047K UE32EH5047 (Panel DE320BGA-B1), SAMSUNG UE40EH5007K (Panel CY-DE400BGSV1L), SAMSUNG UE32EH5057K (Panel DE320BGA-B1), SAMSUNG UE40FH5007K (Panel CY-DF400BGLV1V), SAMSUNG UE40EH5047K (Panel LTJ400HM08-L), SAMSUNG UE40EH5057K UE40EH5057 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5050W UE40EH5050 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5000 UE40EH5000W (Panel LTJ400HM801-V), SAMSUNG UE32EH5000K UE32EH5000 (Panel LTJ320HN07-L), SAMSUNG UE32EH5000W UE32EH5000 (Panel DE320BGM-C1), SAMSUNG LE32E420E2W LE32E420 (Panel LTF320AP13), SAMSUNG UE32EH4030 UE32EH4030W (Panel DE320AGH-C2), SAMSUNG UE46EH5057K UE46EH5057 (Panel LTJ460HN05-L), SAMSUNG UE40EH5040 UE40EH5040W (Panel CY-DE400BGSV1L).
The appearance of the power supply
Main features of the SAMSUNG UE46EH5047 device:
Installed matrix (LED-panel) LTJ460HN05-L.
The matrix control uses the Timing Controller (T-CON) BN41-01797A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SEM5025 PWM controller. As the power elements of the LED driver, keys of the MDD5N40RH type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46EH5047 television are generated by the BN44-00497A power module or its analogs using SPC7011F (PFC), D2011K, FSFR1700 microcircuits and MDF11N60TH power switches.
MainBoard - the main board (motherboard) is a BN41-01795A module, using WT61P805 chips, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP and others.
The tuner BN40-00231A DT0D40FVL084AA provides the reception of television programs and tuning to channels.

Posted By: FRANK at 06:40
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