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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Monday, 6 January 2020

REPAIR / SERVICING TV SAMSUNG UE32F6800

Technical description and composition of the SAMSUNG UE32F6800 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE32F6800 UE32F6800AB
Chassis / Version: TU02
Panel: CY-HF320CSLV1V
LED backlight: LUMENS D2GE-320SC0-R3 [12,12,27]
T-CON: LSF320HJ01 BN41-01939B GA13Y32NNBMB4SL4LV0.2
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2013M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00620A L32X1QP_DSM
PWM Power: D2011K, S3050, 3110A
MOSFET Power: 13NM60N, 5R380CE
MainBoard: BN41-01958A BN94-06226H
IC MainBoard: CPU: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E
Tuner: BN40-00262A
Control: WIFI: WIDT30Q BN59-01161A, Bluetooth: WIBT40A BN96-25376A
Technical Specifications UE32F6800
SAMSUNG UE32F6800
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE32F6800 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
Failure in such cases should begin to be sought in the power supply circuits of BN44-00620A. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of power switches (13NM60N, 5R380CE) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
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 power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) D2011K, S3050, 3110A, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
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, you should update or replace the software (software). When repairing an MB board, you need to check its CPU components: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E. 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.
The malfunction of the tuner BN40-00262A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners and users of the SAMSUNG UE32F6800 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to 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 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 UE32F6800 device:
Installed matrix (LED-panel) CY-HF320CSLV1V.
The matrix control uses the Timing Controller (T-CON) LSF320HJ01.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SLC2013M PWM controller. As power elements of the LED driver, keys of the KF9N25D type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE32F6800 TV are generated by the BN44-00620A power module or its analogs using D2011K, S3050, 3110A microcircuits and power switches of the 13NM60N, 5R380CE type.
MainBoard - the main board (motherboard) is a BN41-01958A module, using CPU chips: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E and others.
The tuner BN40-00262A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:16
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