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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Thursday 9 January 2020

REPAIR / SERVICING TV SAMSUNG UE40EH5300W

Technical description and composition of the SAMSUNG UE40EH5300W TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40EH5300W
Chassis / Version: U71A
Panel: LTJ-400HM08-L
LED backlight: 40-3535LED-60EA-R D1GE-400SCB-R2 BN96-21478A
T-CON: BN41-01797A LSJ-400HM05-S
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2012M
Power Supply (PSU): BN44-00498A = BN44-00498D PD46AV1_CSM PSLF930C04A
PWM Power: SQD2011K (STR3A161HD Standby), SPC7011F (PFC), FSFR1700XS
MainBoard: BN41-01812A (BN94-05731V)
IC MainBoard: CPU: SEMS27; NAND FLASH KLM2G1HE3F-B001; EEPROM: 24C256; SDRAM K4B2G1646C-HCK0
Tuner: BN40-00232A
Appearance
SAMSUNG UE40EH5300W
General repair guidelines for TV LCD LED
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, not the slightest sign of operability - the most likely malfunction is in the power module. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip SQD2011K (STR3A161HD), FSFR1700XC can also cause a breakdown of the power switch of the converter.
Sometimes the SAMSUNG UE40EH5300W 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 - power converter for the backlight LEDs of the LTJ-400HM08-L 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.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
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 motherboard BN41-01812A (BN94-05731V) 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.
When repairing an MB board, you need to check its CPU components: SEMS27; NAND FLASH KLM2G1HE3F-B001; EEPROM: 24C256; SDRAM K4B2G1646C-HCK0. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
If a tuner BN40-00232A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention to the owners! Attempts at self-repair of the SAMSUNG UE40EH5300W TV are not recommended by the manufacturer and can lead to serious negative consequences!

SCHEMATIC MANUAL --------------->  Samsung Chassis: U71A, U71B Model: UE32EH5****, UE22ES5****, UE37EH5****, UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****.



 The appearance of the MainBoard BN41-01812A is shown in the figure below:
BN41-01812A
BN41-01812A can be used in TVs:
SAMSUNG UE32EH5300P (Panel DE320BGM-C1 ), SAMSUNG UE40ES6307U (Panel LTJ400HV05-L), SAMSUNG UE40ES5537K (Panel CY-LE400BGSV1L), SAMSUNG UE32ES5557K (Panel LE320BGM-C1), SAMSUNG UE40EH5307K (Panel LTJ400HM08-L), SAMSUNG UE37ES6307U (Panel LE370CSA-C1), SAMSUNG UE32ES5500 UE32ES5500W (Panel LE320BGM-C1), SAMSUNG UE32ES5530W UE32ES5530 (Panel LE320BGM-C1), SAMSUNG UE32ES5507K UE32ES5507V (Panel LE320BGM-C1), SAMSUNG UE32ES5537K (Panel LE320BGM-C1), SAMSUNG UE40ES5530W UE40ES5530 (Panel CY-LE400BGSV1L), SAMSUNG UE40ES6100W (Panel LTJ400HV05-L), SAMSUNG UE32EH5300W UE32EH5300 (Panel DE320BGM-C1), SAMSUNG UE32EH5307K UE32EH5307 (Panel DE320BGM-C1), SAMSUNG UE55ES6100W (Panel LTJ550HW08-L), SAMSUNG UE46ES6307U (Panel LTJ460HW05-L), SAMSUNG UE40EH5300W (Panel LTJ-400HM08-L), SAMSUNG UE46ES6100W UE46ES6100 (Panel LTJ460HW05-L), SAMSUNG UE37ES6100W (Panel LE370CSA-C1), SAMSUNG UE50ES5700 UE50ES5700SXZG (Panel LE500BGA-B2), SAMSUNG UE40ES5507K UE40ES5507 (Panel LE400BGA-B1), SAMSUNG UE46EH5300 UE46EH5300W (Panel LTJ460HN05-L), SAMSUNG UE32ES6307 UE32ES6307U (Panel LE320CSM-C1), SAMSUNG UE50ES5507K UE50ES5507 (Panel LE500BGA-B2), SAMSUNG UE40ES5557K UE40ES5557 (Panel LE400BGA-B1), SAMSUNG UE46ES6200 (Panel LTJ460HW05-C), SAMSUNG UE32ES6100 UE32ES6100W (Panel LE320CSM-C1), SAMSUNG UE40ES5500 UE40ES5500W (Panel LTJ400HM09-L), SAMSUNG UE32ES5550 UE32ES5550W (Panel LE320BGM-C1).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00498A module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the SPC7011F PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the mains capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE40EH5300W device:
Installed matrix (LED-panel) LTJ-400HM08-L.
The matrix control uses the Timing Controller (T-CON) BN41-01797A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SLC2012M PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE40EH5300W TV are generated by the BN44-00498A power supply module or its analogs using SQD2011K (STR3A161HD Standby), SPC7011F (PFC), FSFR1700XS microcircuits.
MainBoard - the main board (motherboard) is a BN41-01812A module, using CPU chips: SEMS27; NAND FLASH KLM2G1HE3F-B001; EEPROM: 24C256; SDRAM K4B2G1646C-HCK0 and others.
The tuner BN40-00232A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:47
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