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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Monday 6 January 2020

REPAIR / SERVICING TV SAMSUNG UE32H4270AU

Technical description and composition of the SAMSUNG UE32H4270AU TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE32H4270AU UE32H4270
Chassis / Version: CD01
Panel: HH032AGH-R1
LED backlight: 2014SVS32HD_3228_07_REV1.3_131212; 3 * 7 led
T-CON: T-CON: ST3151A04-7 VER: 2.4; CS11102, Q01M, I1991, Q03R
LED driver (backlight): integrated into PSU; 102V 450mA
Power Supply (PSU): BN44-00700A (L32S1_EDY) REV: 1.2
PWM Power: 3S111
MOSFET Power: K10A60W MBRF10150CTL, KF9N25
MainBoard: BN41-02098B BN94-07207Y // BN94-07207Y (BN41-02098A)
IC MainBoard: Nand Flash: ESMT F59L1G81A - 25TI sticker: 1406181204C AZP1P45HS - 1416 1017.3 NT14L 1005.e 4B02, SPI Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, DRV612, A83031410, S13A1D, S24C256, AOZ3015PI
Tuner: DNTS243EH286A BN40-00294A
Control: IR: A30857C (BN41-01976B)
Technical Specifications UE32H4270
SAMSUNG UE32H4270AU
General repair guidelines for TV LCD LED
Repair of the SAMSUNG UE32H4270AU UE32H4270 TV should begin with a fault diagnosis, which involves a careful inspection of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, there is not the slightest sign of operability - the most likely malfunction is in the power module. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the converter K10A60W MBRF10150CTL, KF9N25 The complete inoperability of the power supply unit can be caused by a short circuit of the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the 3S111 PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
Sometimes the SAMSUNG UE32H4270AU 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 HH032AGH-R1 panel, or a break 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.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
Repair of the motherboard BN41-02098B BN94-07207Y must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
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 sticker: 1406181204C AZP1P45HS - 1416 1017.3 NT14L 1005.e 4B02, SPY Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, DRV612, A83031410, S13A1D, S24C25, AOZ3015PI. BGA chip malfunctions are usually easy to detect by warming up.
In the absence of tuning to the local television channels, you should make sure that the software is correct, as well as the presence of supply voltage at the terminals of the tuner DNTS243EH286A BN40-00294A.
Attention! Users and owners of UE32H4270AU TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.


The appearance of the 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 UE32JSV1B (CY.
The appearance of the power supply
Main features of the SAMSUNG UE32H4270AU device:
Installed matrix (LED panel) HH032AGH-R1.
The matrix control uses the Timing Controller (T-CON) T-CON :.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE32H4270AU TV are generated by the BN44-00700A power supply module or its analogs using 3S111 microcircuits and power switches of the K10A60W MBRF10150CTL, KF9N25 type.
MainBoard - the main board (motherboard) is a BN41-02098B module using Nand Flash chips: ESMT F59L1G81A - 25TI sticker: 1406181204C AZP1P45HS - 1416 1017.3 NT14L 1005.e 4B02, SPI Flash; 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, DRV612, A83031410, S13A1D, S24C256, AOZ3015PI and others.
The tuner DNTS243EH286A BN40-00294A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:28
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