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 UE40H5003AK

Technical description and composition of the SAMSUNG UE40H5003AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40H5003AK UE40H5003
Chassis / Version: IS01
Panel: CY-HH040BGNV1V / V400HJ6-PE1 Rev. C7
LED driver (backlight): integrated into PSU; 148V 350mA
MOSFET LED driver: MDD5N40
Power Supply (PSU): BN44-00754A L40G0B_ESM PSLF870G06A
PWM Power: S3330 (FAN6755)
MainBoard: BN41-02217B BN94-07155S
IC MainBoard: SENK14, 25Q40CLSIP, S24C256C, K4B2G164GQ-BCKO
Tuner: BN40-00287A DNTQ403IL286A
Technical Specifications UE40H5003
SAMSUNG UE40H5003AK
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE40H5003AK does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
With such manifestations, a malfunction can sometimes be detected in the BN44-00754A power supply module. It is necessary to measure its output voltages and, if they are absent, to check the short circuit probability in the converters power switches and rectifier diodes.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, elements supplying a PWM controller, frequency-setting, damper, and also elements of the Negative Stabilization Feedback. PWM S3330 (FAN6755) is usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most cases, a malfunction is caused by a lack of display backlight. 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.
When trying to identify a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-02217B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - SENK14, 25Q40CLSIP, S24C256C, K4B2G164GQ-BCKO. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the tuner BN40-00287A DNTQ403IL286A, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE40H5003AK TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!


Appearance of MainBoard and voltage measurements at test points BN41-02217B:
BN41-02217B
BN41-02217B can be used in TVs:
SAMSUNG UE40H4200AK (Panel CY-HH040AGLV1V), SAMSUNG UE40H5300AK (Panel CY-HH040BGNV1V), SAMSUNG UE48H4200AK (Panel CY-HH048AGLV1V) SAMSUNG UE40H5003AK UE40HHV1-PEVH401BEVB1BEV1 (PE)
The appearance of the power supply
Main features of the SAMSUNG UE40H5003AK device:
Installed matrix (LED panel) CY-HH040BGNV1V / V400HJ6-PE1 Rev. C7
To power the backlight LEDs, a converter is used, combined with a power supply. As power elements of the LED driver, keys of the MDD5N40 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40H5003AK TV are generated by the BN44-00754A power module, or its analogs using S3330 chips (FAN6755).
MainBoard - the main board (motherboard) is a BN41-02217B module, using microchips SENK14, 25Q40CLSIP, S24C256C, K4B2G164GQ-BCKO and others.
The tuner BN40-00287A DNTQ403IL286A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:48
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