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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Wednesday 22 January 2020

REPAIR / SERVICING TV SAMSUNG UE65HU9000T

Technical description and composition of the SAMSUNG UE65HU9000T TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE65HU9000T UE65HU9000
Chassis / Version: TS01
Panel: CY-VH065FSLV1V
T-CON: VD_STV5565EU22BC6LV0.1
LED driver (backlight): BN44-00745A REV1.2 L65C4L_ESM PSLF321C06B
Power Supply (PSU): BN44-00744A REV1.3 PSLF321C06A L65C4L_ESM
MainBoard: BN41-02173B BN94-07049S
IC MainBoard: CPU, Weltrend, DRAM, eMMC, AUDIO: NTP7414
Tuner: One Connect box BN94-07652M
Technical Specifications UE65HU9000
SAMSUNG UE65HU9000T
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE65HU9000T 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.
Usually, with such manifestations, the defect is caused by faulty elements in the main power module BN44-00744A. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches and rectifier diodes of the converters for the probability of a short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The most likely in these cases is a malfunction of the LED backlight. More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02173B 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). When repairing an MB board, you need to check its components CPU, DRAM, eMMC, AUDIO, DC / DC. 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 One Connect box BN94-07652M is established after checking the software and all the 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 TV owners! Self-repair attempts by SAMSUNG UE65HU9000T are not recommended by the manufacturer and can lead to serious negative consequences!



The appearance of the MainBoard BN41-02173B is shown in the figure below:
BN41-02173B
The appearance of the power supply
Main features of the SAMSUNG UE65HU9000T device:
Installed matrix (LED panel) CY-VH065FSLV1V.
The matrix control uses the Timing Controller (T-CON) VD_STV5565EU22BC6LV0.1.
The LED driver BN44-00745A is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE65HU9000T TV is carried out by the BN44-00744A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02173B module, using CPU, Weltrend, DRAM, eMMC, AUDIO: NTP7414 and others.
The One Connect box BN94-07652M tuner provides TV reception and channel tuning.


Posted By: FRANK at 08:32
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