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 UE46F6500

Technical description and composition of the SAMSUNG UE46F6500 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE46F6500 AK
Panel: CY-HF400CSLV1V
T-CON: BN41-01939A
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)
MainBoard: BN41-01958B BN94-06727B
IC MainBoard: K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745
Tuner: BN40-00258A
Technical Specifications UE46F6500
SAMSUNG UE46F6500
General repair guidelines for TV LCD LED
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the BN44-00622B power supply module is defective and needs repair. Sometimes with similar manifestations, a problem can only occur in the absence of standby power. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
In cases where the SAMSUNG UE46F6500 TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the CY-HF400CSLV1V panel). When you turn on the TV, the image may appear briefly and disappear. It must be borne in mind that with such manifestations the LEDs themselves also fail.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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.
On the BN41-01958B BN94-06727B motherboard, in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Board repair and replacement of K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 microcircuits are carried out in the presence of the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
The malfunction of the tuner BN40-00258A 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 UE46F6500 TV must 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!

SCHEMATIC -----------------> BN44-00622B Power Supply schematic diagram

 The appearance of the MainBoard BN41-01958B is shown in the figure below:
BN41-01958B
BN41-01958B can be used in TVs:
SAMSUNG UE39F5500 UE39F5500AK (Panel HF390BGM-C1), SAMSUNG UE32F5300AK (Panel HF320BGA-B1), SAMSUNG UE40F6200AK (Panel CY-HF400BGLV2V), SAMSUNG UE32F4500AK (Panel HF32AGH-R1), SAMSUNG UE42F5300AK (Panel CY-HF420BGAV1V), SAMSUNG UE46F6500 AK (Panel CY-HF400CSLV1V), SAMSUNG UE46F6330AK UE46F6330 (Panel CY-HF460CSLV2V), SAMSUNG UE32F6330 AK (Panel CY-HF320CSLV1V), SAMSUNG UE40F6330AK UE40F6330 (Panel CY-HF400CSLV5V), SAMSUNG UE40F6510AB UE40F6510 (Panel CY-GF400CSLV2V), SAMSUNG UE55F6400AK UE55F6400 (Panel CY-HF550CSLV1V), SAMSUNG UE40F6540AB (Panel CY-GF400CSLV3V), SAMSUNG UE40F6500 UE40F6500SS (Panel CY-GF400CSLV1H), SAMSUNG UE46F6650 UE46F6650AB (Panel CY-GF460CSLV1V), SAMSUNG UE46F6510 UE46F6510AB (Panel CY-GF460CSLV2V), SAMSUNG UE50F6330 UE50F6330AK (Panel HF500CSA-B1).
PSU Advanced
The BN44-00622B power module is installed in the UE46F6500 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 the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. 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 UE46F6500 device:
Installed matrix (LED-panel) CY-HF400CSLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-01939A.
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 UE46F6500 TV are generated by the BN44-00622B power module or its analogs using the FSFR1800HS, SPC7011F (PFC = FA5695N), SQD2011K (Standby = STR3A161HD) microcircuits.
MainBoard - the main board (motherboard) is a BN41-01958B module, using the K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 and other chips.
The tuner BN40-00258A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:25
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