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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Sunday 12 January 2020

REPAIR / SERVICING TV SAMSUNG UE40J5520AU

Technical description and composition of the SAMSUNG UE40J5520AU TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40J5520AU UE40J5520
Chassis / Version: HS02
Panel: CY-GJ040BGSV5V
T-CON: RUNTK5538TP ZA 58A20; Q40A-104GIP (EN25P40)
LED driver (backlight): integrated into PSU
PWM LED driver: 7014X
MOSFET LED driver: 5N40, KF3N40W
Power Supply (PSU): BN44-00703G
PWM Power: S3051 (PFC), FA6A20
MOSFET Power: 13N60M2, 14NM50N
MainBoard: BN41-02353B BN94-09121B Hawk_M_FHD_PRO1
IC MainBoard: CPU: SDP1415, Eeprom: S24C512KEY (24C512), SPI Flash: 25Q40CLSIP (Winb25Q40CL), eMMC
Tuner: BN40-00318B
Technical Specifications UE40J5520AU
SAMSUNG UE40J5520AU
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40J5520AU TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, the BN44-00703G power supply module usually fails. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (13N60M2, 14NM50N) and rectifier diodes of the converters for the probability of a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips S3051 (PFC), FA6A20 are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In such cases, the most likely malfunction of the backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-02353B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: SDP1415, Eeprom: S24C512KEY (24C512), SPI Flash: 25Q40CLSIP (Winb25Q40CL), eMMC with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If you suspect a malfunction of the tuner BN40-00318B, first of all, you need 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.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE40J5520AU TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

FIRMWARE  SPI FLASH, EEPROM, T-CON --------->  SAMSUNG UE40J5520AU UE40J5520 HS02, Main: BN41-02353B BN94-09121B Hawk_M_FHD_PRO1, Panel: CY-GJ040BGSV5V

The appearance of the MainBoard BN41-02353B is shown in the figure below:
BN41-02353B
BN41-02353B can be used in TVs:
SAMSUNG UE40J6390 (Panel CY-GH040CSLV1V), SAMSUNG UE40J5530AU UE40J5530 (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5500AU (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5550 UE40J5550AU (Panel CY-GJ040BGSV1V), SAMSUNG UE40J6330AU (Panel CY-GH040CSLVFV), SAMSUNG UE32J6300 UE32J6300AU (Panel CY-GH032CSLV5V), SAMSUNG UE48J6200AU (Panel CY-GH048CSLVAV), SAMSUNG UE48J5510AU (Panel CY-GJ048BGLV3V), SAMSUNG UE32J6500AU UE32J6500 (Panel CY-WJ032CGLV2V), SAMSUNG UE40J5520AU UE40J5520 (Panel CY-GJ040BGSV5V), SAMSUNG UE43J5500 UE43J5500AU (Panel T430HVF01.0), SAMSUNG UE40J6200AU UE40J6200 (Panel CY-GH040CSLV8V), SAMSUNG UE32J5550AU UE32J5550 (Panel CY-GJ032BGAB3V), SAMSUNG UE32J5500AU (Panel T320HVF05.5), SAMSUNG UE40J6590 UE40J6590AU (Panel CY-WJ040CGLV1V), SAMSUNG UE40J5510AU (Panel CY-GJ040BGSV3V).
The appearance of the power supply
Main features of the SAMSUNG UE40J5520AU device:
Installed matrix (LED panel) CY-GJ040BGSV5V.
The matrix control uses the Timing Controller (T-CON) RUNTK5538TP.
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 type 5N40, KF3N40W are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40J5520AU TV are generated by the BN44-00703G power supply module or its analogs using S3051 (PFC), FA6A20 microchips and 13N60M2, 14NM50N power switches.
MainBoard - the main board (motherboard) is a BN41-02353B module using CPU chips: SDP1415, Eeprom: S24C512KEY (24C512), SPI Flash: 25Q40CLSIP (Winb25Q40CL), eMMC and others.
The tuner BN40-00318B provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:30
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