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 15 September 2020

REPAIRING / SERVICING TV SAMSUNG UE32M5500AU

Technical description and composition of the SAMSUNG UE32M5500AU TV, panel type and modules used. The composition of the modules.
SAMSUNG LED
Model: UE32M5500AU
Panel: CY-KK032BGAV1V
LED backlight: BN96-39513A V6EY_320SM0_LED42_R4
T-CON: T550HVN08.3 Ctrl BD 55T23-C0A (TX-5532T42C33)
LED driver (backlight): integrated into PSU
PWM LED driver: 8 pin
MOSFET LED driver: TO-252
Power Supply (PSU): BN44-00869B L32E1P_KPNV
PWM Power: PFC (so-8), PWM (so-16)
MOSFET Power: TO-252
MainBoard: BN41-02575B BN94-11891B
IC MainBoard: CPU: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512
Tuner: N40-00331B
UE32M5500AU Specifications
SAMSUNG UE32M5500AU
General recommendations for TV LCD LED repair
Possible malfunctions
- SAMSUNG UE32M5500AU does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light or flash.
In some of these cases, the fault is detected in the BN44-00869B power module. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches (TO-252) and rectifier diodes of the converters for a possible short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short-circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers PFC (so-8), PWM (so-16), in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be in good working order.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. Often the reason is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver turns out to be faulty.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the BN41-02575B motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
If the TV operates normally from external devices, but does not tune to TV channels, the N40-00331B tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.
Users and owners of TVs should remember that attempts to self-repair a SAMSUNG UE32M5500AU TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!




Additional MainBoard Repair
The appearance of the MainBoard BN41-02575B is shown in the figure below:
BN41-02575B
External view of the power supply
Main features of the SAMSUNG UE32M5500AU device:
Installed matrix (LED panel) CY-KK032BGAV1V.
Matrix control uses the T550HVN08.3 Timing Controller (T-CON).
A converter combined with a power supply is used to power the backlight LEDs, it is controlled by an 8 pin PWM controller. TO-252 switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE32M5500AU TV is carried out by the BN44-00869B power module, or its analogs using PFC (so-8), PWM (so-16) chips and TO-252 power switches.
MainBoard - the main board (motherboard) is a BN41-02575B module, using CPU chips: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512 and others.
Tuner N40-00331B provides reception of television programs and tuning to channels.

 The Samsung website has a firmware (software update) for the UE32M5500AUXRU, version 1280.5 from 11/14/2019.

TV SAMSUNG UE32M5500AU with LCD CY-KK032BGAV3V, diagonal size 31.5 "(80 cm) 16: 9. This model uses a panel with edge LED backlighting - Edge LED.
The CY-KK032BGAV3V matrix and the software of the MainBoard BN41-02575B provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics decomposition at 1080p (Full HD).
The UE32M5500AU TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Speaker sound system power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11n, WiDi, Miracast.
The digital tuner can receive TV channels in DVB-T MPEG4, DVB-C standards.
The power consumed when operating from the network is 65 W. BN94-10883A power supply.
Dimensions: with stand 730x488x208 mm, without stand 730x434x55 mm.
TV weight: with stand: 6.2 kg, without stand: 9.5 kg.
Attention! Panel CY-KK032BGAV3V of LED TV SAMSUNG UE32M5500AU is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.


Posted By: FRANK at 06:09
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