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 10 January 2020

REPAIR / SERVICING TV SAMSUNG UE40F6100AK

Technical description and composition of the SAMSUNG UE40F6100AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40F6100AK
Chassis / Version: Ver. VH05 U88A
Panel: CY-HF400CSLV2V
LED backlight: D2GE-400SCB-R3 [12,12,28]; D2GE-400SCA-R3 [12,12,28] LED 3535 = A127CECEBUP8
T-CON: LSF400HJ01, BN41-02069A, BN95-01129A
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2013M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00622B
PWM Power: FSFR1800HS, SPC7011F (PFC = FA5695N), SQD2011K (Standby = STR3A161HD)
MOSFET Power: STF13NM60 (PFC)
MainBoard: BN41-01954A
IC MainBoard: CPU: SENK13; EEPROM: 24c256, FLASH: 25Q40
Tuner: BN40-00262A DNTS403EH105A DVB-T2 / C
Control: R BN96-26401N (BN41-01976B) and bluetooth BN96-25376a, WIBT40A
Technical Specifications UE40F6100
SAMSUNG UE40F6100AK
General repair guidelines for TV LCD LED
If the UE40F6100AK does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the BN44-00622B power supply module is probably faulty in this case. After checking the mains fuse and power elements of the primary power supply circuit, you should also check for the presence of a short circuit in the loads of the secondary rectifiers.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the FSFR1800HS PWM controller chip; PFC: SPC7011F; Standby: SQD2011K (STR3A161HD), which can only be checked by replacing with a new or obviously working one.
If the SAMSUNG UE40F6100AK has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the CY-HF400CSLV2V panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the backlight unit.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as the contact connections in the connectors and soldering.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
If the motherboard BN41-01954A is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement.
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - CPU: SENK13; EEPROM: 24c256, FLASH: 25Q40. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Malfunction of the tuner BN40-00262A DNTS403EH105A DVB-T2 / C 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.
Attention! Users and owners of UE40F6100AK TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.

Service manual and schematic diagram ------------> SAMSUNG UE32F6100AW, UE40F6100AW, UE46F6100AW, UE55F6100AW Chassis U88A.

Схема блока питания BN44-00622B Power Supply schematic diagram.

The appearance of the MainBoard BN41-01954A is shown in the figure below:
BN41-01954A
BN41-01954A can be used in TVs:
SAMSUNG UE40F6100AK (Panel CY-HF400CSLV2V), SAMSUNG UE32F6100 UE32F6100AK (Panel HF320CSA-B1), SAMSUNG UE50F6130 UE50F6130AK (Panel HF500CSA-B2), SAMSUNG UE40F6130AK UE40F6130 (Panel CY-HF400CSLV2V).
PSU Advanced
The BN44-00622B power module is installed in the UE40F6100AK TV using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the PWM controller SPC7011F = FA5695N does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when its reactance determines the charge current (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the SAMSUNG UE40F6100AK device:
Installed matrix (LED panel) CY-HF400CSLV2V.
The matrix control uses the Timing Controller (T-CON) LSF400HJ01.
To power the backlight LEDs, a converter is used, combined with the 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 UE40F6100AK TV are generated by the BN44-00622B power module or its analogs using the FSFR1800HS, SPC7011F (PFC = FA5695N), SQD2011K (Standby = STR3A161HD) microcircuits and STF13NM60 (PFC) power switches.
MainBoard - the main board (motherboard) is a BN41-01954A module, using CPU chips: SENK13; EEPROM: 24c256, FLASH: 25Q40 and others.
The tuner BN40-00262A DNTS403EH105A DVB-T2 / C provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:02
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