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 UE39EH5003

Technical description and composition of the SAMSUNG UE39EH5003 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE39EH5003 UE39EH5003W
Chassis / Version: Version: AD02
Panel: DE390BGA-C1
LED backlight: 39-3535LED-60EA-R - D1GE-390SCB-R1
T-CON: T500HVN01.7 Ctrl BD
LED driver (backlight): integrated into PSU; 210V 260mA
Power Supply (PSU): BN44-00496B PD40AFV_CDY
PWM Power: 2S110 (SSC 2S110)
MOSFET Power: SLC1012C
MainBoard: BN41-01897A BN94-05971Z
IC MainBoard: NAND: K9F1G08U0D, RAM: K4B1G1646D-HCH9, SPI Flash: 25Q40, Eeprom: 24C256, Sound: NTP7412S
Tuner: DTTX-51B / C3 BN40-00231B
Control: Remote: AA59-00602A, IR: BN96-24259C BN41-01901A
Technical Specifications UE39EH5003
SAMSUNG UE39EH5003
General repair guidelines for TV LCD LED
Sometimes the SAMSUNG UE39EH5003 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the PD40AFV_CDY common power supply module. If it is working properly, you must check the standby batteries on the Main Board. After checking the mains fuse and power elements of the primary circuit of the PSU pulse converter, you should also check for the presence of a short circuit in the loads of the secondary rectifiers.
The breakdown of the power switch in the converters is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as damper elements in its drain and the transformer winding.
If there is no image when you turn on the SAMSUNG UE39EH5003, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the DE390BGA-C1 panel, or in their power converter - LED driver, which is made according to the flyback boosting scheme (Step- Up) a voltage converter with current stabilization in the load.
A backlight failure often occurs due to an open circuit in the LED line circuit. Sometimes it is necessary to disassemble the panel and check the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
To check the lines of LEDs (strings) for breaks without disassembling the panel, for example, a current source will help. It is not possible to open series-connected PN junctions with a simple multimeter.
Repair of the BN41-01897A motherboard 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.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - NAND: K9F1G08U0D, RAM: K4B1G1646D-HCH9, SPI Flash: 25Q40, Eeprom: 24C256, Sound: NTP7412S with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The failure of the DTTX-51B / C3 BN40-00231B tuner is established after checking the software and all supply voltages at its terminals. For persuasiveness, you can see the data exchange of the tuner with the processor using an oscilloscope.
Attention! For users and owners of UE39EH5003 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.



The appearance of the MainBoard BN41-01897A is shown in the figure below:
BN41-01897A
BN41-01897A can be used in TVs:
SAMSUNG UE32FH4003W (Panel CY DF320AGLV1V), SAMSUNG UE39EH5003 UE39EH5003W (Panel DE390BGA-C1), SAMSUNG UE50ES6907U UE50ES6907 (Panel SE500CSA-B1), SAMSUNG UE32E3H3400.
The appearance of the power supply
Main features of the SAMSUNG UE39EH5003 device:
Installed matrix (LED panel) DE390BGA-C1.
The matrix control uses the Timing Controller (T-CON) T500HVN01.7.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE39EH5003 television are generated by the BN44-00496B power module or its analogs using 2S110 microcircuits (SSC2S110) and power switches of the SLC1012C type.
MainBoard - the main board (motherboard) is a BN41-01897A module, using NAND chips: K9F1G08U0D, RAM: K4B1G1646D-HCH9, SPI Flash: 25Q40, Eeprom: 24C256, Sound: NTP7412S and others.
Tuner DTTX-51B / C3 BN40-00231B provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:59
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