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 31 December 2019

REPAIR / SERVICING TV SAMSUNG UE22F5000

Technical description and composition of the SAMSUNG UE22F5000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE22F5000 UE22F5000AK
Panel: M215HW03 V.1
T-CON: M215HW03 V1 21M03-C07
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): BN44-00592A A3514 14V 2.5A // BN44-00394C PA-1031-21
MainBoard: BN41-01987A - BN94-06755T
IC MainBoard: SENK13, K4B1G1646G, TPS54328, DRV612, LSC5013R, NTP-7412S, 25Q40CLSIP, K9F1G08U0D, TPS54327, C4435SS, S24C02, S24C2S, LD1117AC
Tuner: BN40-00261A DNTS403EL105A
Technical Specifications UE22F5000
SAMSUNG UE22F5000
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE22F5000 TV does not turn on, does not respond to the remote control and control panel buttons, does not blink with any indicators.
Most often, with such manifestations, the main power module BN44-00592A is found to be faulty. Then it is necessary to measure its secondary (output) voltages and, if they are absent, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes 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 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 is required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01987A 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). When repairing an MB board, you need to check its components SENK13, K4B1G1646G, TPS54328, DRV612, LSC5013R, NTP-7412S, 25Q40CLSIP, K9F1G08U0D, TPS54327, C4435SS, S24C02, S24C2S, LD1117AC. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the tuner BN40-00261A DNTS403EL105A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners and users of the SAMSUNG UE22F5000 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!

The appearance of the MainBoard BN41-01987A is shown in the figure below:
BN41-01987A
BN41-01987A can be used in TVs:
SAMSUNG UE28F4020AW (Panel HF280AGH-R1), SAMSUNG LT27C370EX (Panel LTM270HL01), SAMSUNG UE22F5000 UE22F5000AK (Panel M215HW03 V.1), SAMSUNG UE28F4000 UE28F4000AW-C1 H2.
The appearance of the power supply
Main features of the SAMSUNG UE22F5000 device:
Installed matrix (LED-panel) M215HW03 V.1.
The matrix control uses the Timing Controller (T-CON) M215HW03.
To power the backlight LEDs, a converter is used, combined with the main board BN41-01987A.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE22F5000 TV is carried out by the BN44-00592A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-01987A module using SENK13, K4B1G1646G, TPS54328, DRV612, LSC5013R, NTP-7412S, 25Q40CLSIP, K9F1G08U0D, TPS54327, C4435SS, S24C02, S24C02 microcircuits.
The tuner BN40-00261A DNTS403EL105A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: M215HW03 V1QA
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 3.8 / 1.2 (Tr / Td)
Frequency: 60Hz
Lamp Type: 16S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V

Posted By: FRANK at 08:28
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