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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Sunday, 12 January 2020

REPAIR / SERVICING TV SAMSUNG UE40JU6600U

Technical description and composition of the SAMSUNG UE40JU6600U TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40JU6600U
Panel: CY-WJ040HGLV4V
LED backlight: LM41-00117C, LM41-00117B
T-CON: BN41-02297 LSF400FN02-K
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00806A L40S6_FDY
MOSFET Power: K8A50D
MainBoard: BN41-02344D
IC MainBoard: CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, dram: K4B2G1646Q-BCMA
Tuner: BN40-00318B
Technical Specifications UE40JU6600U
SAMSUNG UE40JU6600U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40JU6600U 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 BN44-00806A power module is faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (K8A50D) and rectifier diodes for a probable short circuit.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually 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), if they do not have visible damage to the chassis and open short circuit 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 some of these cases, a malfunction is caused by a lack of display 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 lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN-junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-02344D 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing Spi Flash elements: 25Q40CLSIP, SOUND: NTP7415 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE40JU6600U TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

The appearance of the MainBoard BN41-02344D is shown in the figure below:
BN41-02344D
The appearance of the power supply
Main features of the SAMSUNG UE40JU6600U device:
Installed matrix (LED-panel) CY-WJ040HGLV4V.
The matrix control uses the Timing Controller (T-CON) BN41-02297.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40JU6600U television is carried out by the BN44-00806A power module, or its analogs using power switches of the K8A50D type.
MainBoard - the main board (motherboard) is a BN41-02344D module, using CPU chips: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, dram: K4B2G1646Q-BCMA and others.
The tuner BN40-00318B provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:08
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