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 UE46F6540AB

Technical description and composition of the SAMSUNG UE46F6540AB TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE46F6540AB
Chassis / Version: U85A
Panel: CY-GF460CSLV3V
T-CON: LSF460HJ03 BN41-01939C
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2013M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00623B L46X1Q_DHS
PWM Power: D2011K (Standby), SPC7011 (PFC), FSFR1800HSL (PWM)
MOSFET Power: STF13NM60
MainBoard: BN41-01958A BN94-06222
IC MainBoard: K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745
Tuner: BN40-00262A DNTS403EH105A DVB-T2 / C
Control: AA59-00786A, AA59-00775A
Technical Specifications UE46F6540
SAMSUNG UE46F6540AB
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46F6540AB does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With similar manifestations in some cases, the BN44-00623B power module turns out to be faulty. It is necessary to measure its output supply voltages, and in case of their complete or partial absence, it is necessary to check the serviceability of power switches (STF13NM60) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions. The standby power converter implemented on the PWM D2011K (Standby) must be checked first.
In the event of a breakdown of the semiconductor elements in the secondary circuits of the converter, it can usually fail in short circuit mode, and during short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often 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 D2011K (Standby), SPC7011 (PFC), FSFR1800HSL (PWM), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The most likely in these cases is a malfunction of the LED backlight. 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.
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 an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01958A 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00262A DNTS403EH105A DVB-T2 / C may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. 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.
Attention! For users and owners of UE46F6540AB TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to the complete non-repairability of the device.


The appearance of the MainBoard BN41-01958A is shown in the figure below:
BN41-01958A
BN41-01958A can be used in TVs:
SAMSUNG UE39F5500 UE39F5500AK (Panel HF390BGM-C1), SAMSUNG UE32F5300AK (Panel HF320BGA-B1), SAMSUNG UE32F6200 UE32F6200AK (Panel CY-HF320BGLV2V), SAMSUNG UE42F5500AK (Panel HF420BGA-B1), SAMSUNG UE32F4500AK (Panel HF32AGH-R1), SAMSUNG UE32F5500AK UE32F5500AW (Panel HF320BGA-B1), SAMSUNG UE40F6400 UE40F6400AK (Panel CY-HF400CSLV2V), SAMSUNG UE42F5300AK (Panel CY-HF420BGAV1V), SAMSUNG UE32F6400AK UE32F6400 (Panel HF320CSA-B1), SAMSUNG UE39F5300AK UE39F5300 (Panel HF390BGM-C1), SAMSUNG UE46F6200AK (Panel CY-HF460BGLV2V), SAMSUNG UE46F6400AK (Panel СY-HF460CSLV2V), SAMSUNG UE46F6540AB (Panel CY-GF460CSLV3V), SAMSUNG UE40F6540AB (Panel CY-GF400CSLV3V), SAMSUNG UE40F6650 UE40F6650AB (Panel CY-GF400CSLV1V), SAMSUNG UE32F6540 (Panel CY-HF320CSLV3V), SAMSUNG UE46F5300 UE46F5300AK (Panel CY-HF460BGLV1V), SAMSUNG UE32F6800 UE32F6800AB (Panel CY-HF320CSLV1V).
The appearance of the power supply
Main features of the SAMSUNG UE46F6540AB device:
Installed matrix (LED panel) CY-GF460CSLV3V.
The matrix control uses the Timing Controller (T-CON) LSF460HJ03.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SLC2013M PWM controller. As the power elements of the LED driver, keys of the KF9N25D type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46F6540AB TV are generated by the BN44-00623B power supply module or its analogs using D2011K (Standby), SPC7011 (PFC), FSFR1800HSL (PWM) microcircuits and power switches of the STF13NM60 type.
MainBoard - the main board (motherboard) is a module BN41-01958A, using microcircuits K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 and others.
The tuner BN40-00262A DNTS403EH105A DVB-T2 / C provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:29
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