Technical description and composition of the SAMSUNG T22C350EX TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: T22C350EX
Chassis / Version: BN41-02198
Panel: HT215F01-100 B4
LED driver (backlight): integrated into MainBoard
PWM LED driver: S5014R
Power Supply (PSU): Adapter
MainBoard: BN41-02198B
IC MainBoard: CPU: SENK14, SPI FLASH: 25Q40, EEPROM: 24C256, NAND: F59L1G81A, Power_IC: TPS54328DDA
Tuner: BN40-00287B GT2CX-33X264B / FN-FNS
Technical Specifications LT22C350EX
SAMSUNG T22C350EX
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG T22C350EX 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.
In some of these cases, a malfunction is detected in the adapter power module.
This TV model is equipped with an external adapter type power supply, which the owner can purchase on his own, and repairing it may not always be advisable, however, sometimes it makes sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Failure in most such cases is detected in the nodes and 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 is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode 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 BN41-02198B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: SENK14 / SENK13, FLASH: 25Q40CLSIP, EEPROM AT24C256 (24C256), NAND: -F59L1G81A, RAM DDR3: K4B2G1646C, Power_IC: TPS54328DDA requires the necessary training and professional skills for repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally from external devices, but does not tune to television channels, the tuner BN40-00287B GT2CX-33X264B / FN-FNS may be malfunctioning. 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 cause of the inoperability of the tuner may be a software failure.
TV users and owners must remember that attempts to self-repair a SAMSUNG T22C350EX TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE SPI FLASH ----------> SAMSUNG T22C350EX, Main: BN41-02198, Panel: HT215F01-100 B4.
FOR TYPES 2 SAMSUNG T22C350EX:
Panel: M215HGE-L21 Rev.C1, MAIN: BN41-01987B BN94-06267K.
CPU: SENK13 1342-CS, SPI FLASH: 25040CLSIP, NAND: K9F1G08U0D, DDR DRAM: K4B1G1646G-BCK0, TUNER: BN40-00261B.
The appearance of the MainBoard BN41-02198B is shown in the figure below:BN41-02198B
Main features of the SAMSUNG T22C350EX device:
Installed matrix (LED panel) HT215F01-100 B4.
To power the backlight LEDs, a converter is used, combined with the main board BN41-02198B, controlled by the S5014R PWM controller.
To power all internal components of the SAMSUNG T22C350EX TV, an external adapter type source is used.
MainBoard - the main board (motherboard) is a BN41-02198B module, using CPU chips: SENK14, SPI FLASH: 25Q40, EEPROM: 24C256, NAND: F59L1G81A, Power_IC: TPS54328DDA and others.
The tuner BN40-00287B GT2CX-33X264B / FN-FNS provides the reception of television programs and tuning to channels.
