First, the screen protection control related signals: 1. VDD-DET power supply detection signal: A 5V power supply is output from pin 14 and 15 of the logic board CN2033 socket to pins 14 and 15 of the X drive component CN4001 socket. This voltage is directly connected to the power supply of the X drive component. The signal from pin 13 of the CN4701 socket is sent to pin 13 of the Y drive component CN5001 via a connecting cable, forming the VDD-DET power supply detection signal. 2. Y adapter component power supply detection signal: The Y drive components, including T5000 (LJ26-00105A) and U5001 (FSL136MR), generate the VSCAN voltage and also provide two sets of power supplies for the Y adapter component: 17V and 144V. The 17V power is delivered from pin 4 of the Y drive component CN5002 to pin 9 of the Y adapter component CN54OO, while the 144V power is supplied from pins 1 and 2 of the Y drive component CN5002 to pins 11 and 12 of the Y adapter component CN5400. Additionally, the 17V power is sent directly to pin 11 of the CN5403 socket and then to pin 2 of the Y drive component CN5005 through a connection socket. The 144V power also powers the Y-transfer component IC and is tested within the circuit, with the test result output to pin 10 of the CN5403 socket in open-drain mode, and sent to pin 3 of the Y drive component CN5005 through the connection socket. 3. Protection request signal (DRV-RESET) and protection execution signal (DS-RESET): The DRV-RESET signal is generated when the Y drive component detects an error and sends a protection request to the logic board. A low level indicates normal operation, while a high level triggers a protection request. This signal is sent from pin 21 of the Y drive component CN5006 socket to the logic board. The DS-RESET signal is transmitted by the logic board to the Y driver component to execute protection. A low level means normal operation, and a high level initiates protection, which is sent from pin 22 of the Y drive component CN5006 socket. Second, S50HW-YD14 screen protection circuit (on Y drive components): The S50HW-YD14 screen protection circuit operates by receiving VDD power from the logic board CN2022 socket through a cable to pins 25 and 24 of the Y drive component CN5006 socket, providing power for the protection detection circuit. After passing through resistors R5007 and ZD5000, the 17V power activates the optocoupler's primary LED. The secondary side acts as a short circuit, and the fourth pin of the optocoupler is grounded. This causes the third pin of U5005 to go low, and the 17th pin of U5003 also outputs a low signal, which is sent to the first pin of the dual diode D5009. At the same time, the VDD-DET power signal from the CN5001 socket is divided by R5013 and R5058, causing Q5004 to saturate and turn on, resulting in a low-level output at the third pin of D5009. These two low-level signals are combined through the OR gates formed by D5009, R5014, and R5011, and are output to pin 21 of the CN5006 (DRV-RESET). When the logic board detects this low-level signal, it determines that the entire screen circuit is functioning properly. On the other hand, if the X board is not connected or severely damaged, the VDD-DET signal cannot activate Q5004. As a result, the VDD power flows through R5012 and D5009 to pin 3, then to pin 2 via R5014, and finally to ground through R5011. The optocoupler’s primary side does not emit light, and its secondary side acts as an open circuit. The VDD power passes through R5008 and R5088 to ground, and the divided voltage is sent to the third pin of U5005. After being amplified by U5005, a high-level signal is output from the 17th pin. This forms a high-level DRV-RESET signal on R5011 through D5009’s pins 1 to 3, R5014, and R5011. Additionally, if the Y switching component detects an abnormality in the 144V power supply, Q5401 will conduct, shorting the first pin of the optocoupler to ground. This prevents the optocoupler from emitting light and also generates a high-level DRV-RESET signal on R5011. Once the logic board recognizes the high-level DRV-RESET signal, it immediately initiates protection: the DS-RESET signal is sent from the logic board, reaching the Y drive component via pin 22 of the CN5006 socket. This signal is applied to the first pin of U5005 and U5000, grounding the output and shutting down the subsequent circuits, preventing any further signal input. Finally, the logic board sends a VS-ON shutdown signal to the power board, which turns off the VS and VA power outputs for protection. This screen protection control principle is identical to that of the S50HW-YD13 screen, making it suitable for maintenance purposes.
Single Phase UPS provides backup power for small businesses, home offices, and critical equipment, ensuring continuous operation during power outages.
Features of single phase UPS include:
1. Automatic voltage regulation (AVR): This feature stabilizes the output voltage of the UPS, ensuring a constant and reliable power supply to the connected equipment.
2. Battery backup: Single phase UPS systems are equipped with batteries that provide backup power in the event of a power outage. This allows the connected equipment to continue operating without interruption.
3. Surge protection: UPS systems also offer surge protection to safeguard the connected equipment from power surges and spikes.
4. Monitoring and management: Some single phase UPS systems come with monitoring and management capabilities, allowing users to monitor the UPS status, battery level, and other important parameters.
5. Energy efficiency: Many modern single phase UPS systems are designed to be energy-efficient, helping users save on energy costs.
Usage of single phase UPS:
Single phase UPS systems are commonly used in homes, small businesses, and offices to protect computers, servers, networking equipment, and other critical electronic devices from power disruptions. They are also used in industrial settings to protect machinery and equipment from power disturbances.
Overall, single phase UPS systems play a crucial role in ensuring the reliability and availability of power to sensitive electronic equipment, making them an essential component of any power protection strategy.
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