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 UE40H5290AU

Technical description and composition of the SAMSUNG UE40H5290AU TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40H5290AU UE40H5290
Chassis / Version: Ver: TS01
Panel: CY-GH040BGLV1V
LED backlight: SAMSUNG_2014SVS40_3228 R03 / L06_REV1.1_131112, and BN41-02172A ((BN96-30417a)
T-CON: BN41-02111A LSF400HM03
LED driver (backlight): integrated into PSU; 195V 450mA
PWM LED driver: 7014X
MOSFET LED driver: AOD5N40
Power Supply (PSU): BN44-00703A L48S1_ESM
PWM Power: SEM3051 (PFC), FA6A01N (PWM resonant)
MOSFET Power: 13N60M2 (PFC), 50R380P
MainBoard: BN41-02098B - BN94-07143S
IC MainBoard: Nand Flash: ESMT F59L1G81A - 25TI, SPI Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI
Tuner: BN40-00294A DNTS243EH286A
Control: IR: BN41-02150A
Technical Specifications UE40H5290
SAMSUNG UE40H5290AU
General repair guidelines for TV LCD LED
If the power module BN44-00703A L48S1_ESM malfunctions, the external manifestations may be different, for example, SAMSUNG UE40H5290AU does not turn on at all and there is no indication of the indicator lights on the front panel. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip 3S111, 6C14640 (FA5760N) itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
Sometimes the SAMSUNG UE40H5290AU TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - the power converter of the backlight LEDs of the CY-GH040BGLV1V panel, or an open circuit in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by the power of the backlight unit.
The lack of backlight often occurs due to an open circuit in the LED circuit. There is a need for disassembling the panel and checking the LEDs themselves, as well as the same contact connections in the connectors and rations of the terminals.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
The motherboard BN41-02098B - BN94-07143S must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the Nand Flash elements: ESMT F59L1G81A - 25TI, SPI Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00294A DNTS243EH286A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend the owners of the UE40H5290AU TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!




The main view of MainBoard BN41-02098B is shown in the figure below:
BN41-02098B
BN41-02098B can be used in TVs:
SAMSUNG UE32H4270AU UE32H4270 (Panel HH032AGH-R1), SAMSUNG LT24D310ES (Panel V236BJ1-LE2), SAMSUNG UE40H5000AK (Panel CY-GH040BGLV1V), SAMSUNG UE48H5270AU UE48H5270 (Panel CY-GH048BGLV1V), SAMSUNG UE32H4290AU UE32H4290 (Panel HH032AGH-R2), SAMSUNG UE40H5290AU UE40H5290 (Panel CY-GH040BGLV1V), SAMSUNG UE40J5000AU UE40J5000 (Panel CY-JJ040BGNV2V), SAMSUNG UE40H5020 UE40H5020AK (Panel CY-GH040BGSV1V), SAMSUNG UE40J5100AU (Panel CY-GH040BGSR1V), SAMSUNG T31D310EW (Panel CY-HH032AGSV1H), SAMSUNG UE48J5000AU (Panel CY-JJ048BGEV5V), SAMSUNG UE32H5020AK (Panel CY-GH032BGLV4V), SAMSUNG UE40J5120AU (Panel CY-GH040BGSV1V), SAMSUNG LT32E310EX T32E310EX (Panel CY-GJ032BGEV1V), SAMSUNG UE40H5270 UE40H5270AU (Panel CY-GH048BGLV1V), SAMSUNG UE32J5100AK UE32J5100 (Panel CY-GH032BGSV1V), SAMSUNG UE32H5000AK UE32H5000 (Panel CY-GH032BGLV1V), SAMSUNG UE48H5000 UE48H5000AK (Panel CY-GH048CSLV1V), SAMSUNG UE32J5120AK UE32J5120 (Panel CY-GH032BGSV1V).
The appearance of the power supply
Main features of the SAMSUNG UE40H5290AU device:
Installed matrix (LED panel) CY-GH040BGLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02111A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a 7014X PWM controller. As power elements of the LED driver, keys of the AOD5N40 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40H5290AU TV are generated by the BN44-00703A power module or its analogs using SEM3051 (PFC), FA6A01N (PWM resonant) microcircuits and power switches of the 13N60M2 (PFC), 50R380P type.
MainBoard - the main board (motherboard) is a BN41-02098B module using Nand Flash chips: ESMT F59L1G81A - 25TI, SPI Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI and others.
The tuner BN40-00294A DNTS243EH286A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:58
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