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 UE46F6400AK

Technical description and composition of the SAMSUNG UE46F6400AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE46F6400AK
Chassis / Version: U85A
Panel: CY-HF460CSLV2V
LED backlight: LUMENS D2GE-460SCA / B-R3 (13,01,14), BN41-01971A (A25337A)
T-CON: BN41-01938B - LSF460HN02
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 - BN94-06271H
IC MainBoard: UE46F6400AK
Tuner: UE46F6400AK
Control: Wi-Fi: WIDT30Q BN59-01161A, IR: A26401F (BN41-01976B).
Technical Specifications UE46F6400
SAMSUNG UE46F6400AK
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46F6400AK 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.
Failure in such cases should begin to be sought in the circuits of the switching power supply - module BN44-00623B. It is necessary to measure its output voltages, and if they are completely or partially absent, check the power switches (STF13NM60) and rectifier diodes in the converters for a short circuit.
It should not be forgotten that in case of breakdowns of semiconductors in secondary circuits, the converter can crash in short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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 or obviously working ones.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Often in such cases, there is no 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.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its UE46F6400AK chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If you suspect a malfunction of the UE46F6400AK tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
TV users and owners must remember that attempts to self-repair a SAMSUNG UE46F6400AK TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!


SCHEMATIC MANUAL ----------------->  SAMSUNG UE32F6400, UE40F6400, UE46F6400, UE50F6400, UE55F6400, UE65F6400, UE75F6400 CHASSIS U85A.

VARIANT----> SAMSUNG UE46F6400AK ver: UH05
Panel: СY-HF460CSLV2V, Main BN94-07095K BN41-01958B, T-con: LSF460HJ02 BN41-02069A,
PSU & Led-driver: BN44-00623B L46X1Q_DHS,
Backlight: LUMENS D2GE-460SCA-R3(13,01,14), LUMENS D2GE-460SCB-R3(13,01,14), BN41-01971A (A25337A),
IR: BN96-26401F (BN41-01976B), WiFi: WIDT30Q BN59-01161A, bluetooth WIBT40A: BN96-25376a WISOL_B600_R7


 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 CY-HF460BGLV2V), SAMSUNG UE46F6400AK (Panel CY-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 UE46F6400AK device:
Installed matrix (LED panel) CY-HF460CSLV2V.
The matrix control uses the Timing Controller (T-CON) BN41-01938B.
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 UE46F6400AK 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 BN41-01958A module, using UE46F6400AK chips and others.
The UE46F6400AK tuner provides TV reception and channel tuning.
Posted By: FRANK at 06:21
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