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 UE46EH5000

Technical description and composition of the SAMSUNG UE46EH5000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE46EH5000 UE46EH5000W
Chassis / Version: U71A / U71B
Panel: LTJ460HN05-L
LED backlight: BN96-21479A 46-3535LED-72EA-L, BN96-21480A 46-3535LED-72EA-R
T-CON: BN41-01797A LTJ460HN03-S
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
MOSFET LED driver: MDD5N40RH
Power Supply (PSU): BN44-00497A PD46AVF_CSM
PWM Power: SPC7011F, D2011K, FSFR1700
MOSFET Power: MDF11N60TH
MainBoard: BN41-01795A BN94-05548
IC MainBoard: WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D
Tuner: BN40-00231A
Technical Specifications UE46EH5000
SAMSUNG UE46EH5000
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46EH5000 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Often in such cases, the BN44-00497A 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 (MDF11N60TH) and rectifier diodes of the converters for possible short circuit.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers SPC7011F, D2011K, FSFR1700, in the absence of visible damage or frank faults between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
Failure in most such cases is detected in the nodes and backlight elements of the LED panel. Often the cause is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver is malfunctioning.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00231A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
We recommend the owners of the UE46EH5000 TV for repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!


Service manual ----------------->  SAMSUNG UE46EH5000 Chassis BN41-01795A.



 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
BN44-00497A:
BN44-00497A
Main features of the SAMSUNG UE46EH5000 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 UE46EH5000 TV are generated by the BN44-00497A power supply module or its analogs using SPC7011F, D2011K, FSFR1700 microchips and MDF11N60TH power switches.
MainBoard - the main board (motherboard) is a BN41-01795A module using WT61P805 chips, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D and others.
The tuner BN40-00231A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:35
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