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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Tuesday 7 January 2020

REPAIR / SERVICING TV SAMSUNG UE39F5000AK

Technical description and composition of the SAMSUNG UE39F5000AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE39F5000AK UE39F5000
Chassis / Version: Ver: NU07 Chassis: U85B, U85C
Panel: CY-HF390BGMV1V
LED backlight: L9174 39E 27896A 617 D2GE-390SCA-R3 [12,12,28]
T-CON: V390HJ4-CE1
LED driver (backlight): integrated into PSU; 136V 280mA, 182V 280mA, 147V 280mA, 195V 280mA
PWM LED driver: Z1948AI
Power Supply (PSU): BN44-00609F L42SFV_DSM PSLF990505A
PWM Power: S3050 (PFC), ADP3110A, D2011K (Standby)
MainBoard: BN41-01955B BN94-06996P
IC MainBoard: SEMS29, 25040CLSIP, F59L1G81A-25TIG, K4B1G1646G-BCKO, S24C256C, NTP-7412S
Tuner: BN40-00262A
Control: IR: BN96-26411D (BN41-01976B)
Technical Specifications UE39F5000
SAMSUNG UE39F5000AK
General repair guidelines for TV LCD LED
Malfunctions of the BN44-00609F L42SFV_DSM PSLF990505A power supply module can be expressed in different ways, for example, SAMSUNG UE39F5000AK does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
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.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions, there is a greater likelihood of a malfunction of the display backlight LEDs or the LED driver (power converter of the backlight unit CY-HF390BGMV1V).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
If the BN41-01955B BN94-06996P motherboard 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.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements SEMS29, 25040CLSIP, F59L1G81A-25TIG, K4B1G1646G-BCKO, S24C256C, NTP-7412S. BGA chip malfunctions are usually easy to detect by warming up.
Before changing the tuner BN40-00262A, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Owners and users of the SAMSUNG UE39F5000AK 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 --------------> Chassis: U85B, U85C. Models: UE**F5000A*, UE32F4800AW, UE**F5005AK, UE**F5020AK, UE**F5070SS, UE32F40**AW



 The appearance of the MainBoard BN41-01955B is shown in the figure below:
BN41-01955B
BN41-01955B can be used in TVs:
Samsung UE32F4000AW (Panel CY-HF320AGLV1V), SAMSUNG UE32F4020AW (Panel CY-HF320AGLV1V), SAMSUNG UE39F5020AK (Panel CY-HF390BGMV1V), SAMSUNG UE39F5000AK UE39F5000 (Panel CY-HF390BGMV1V).
PSU Advanced
The power module BN44-00609F is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on the S3050 PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operation mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE39F5000AK device:
Installed matrix (LED panel) CY-HF390BGMV1V.
The matrix control uses the Timing Controller (T-CON) V390HJ4-CE1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the Z1948AI PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE39F5000AK TV are generated by the BN44-00609F power module or its analogs using S3050 (PFC), ADP3110A, D2011K (Standby) microcircuits.
MainBoard - the main board (motherboard) is a BN41-01955B module, using the chips SEMS29, 25040CLSIP, F59L1G81A-25TIG, K4B1G1646G-BCKO, S24C256C, NTP-7412S and others.
The tuner BN40-00262A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 09:04
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