Tower clock equipment may inevitably encounter various malfunctions during use due to human factors such as materials, craftsmanship, and environment. Maintenance of the large clock is an effective measure to eliminate potential faults, extend the service life of the tower clock equipment, and keep the clock in good working condition, ensuring its mechanical performance and normal operation. The scope of this work includes:

• 1. Inspect the tower clock movement and control components. Continual on-off circuit switching is damaging to both the circuit and the movement, so the most susceptible part in a tower clock is the movement. Each startup and stoppage of the tower clock causes the needles inside to tremble, which reduces the lifespan of the movement and necessitates repairs.

• 2. Calibration of Timekeeping. Modern school clocks add a feedback anti-freezing switch on the movement, introducing another closed-loop control. This ensures that the movement provides a feedback signal to the master clock control system with each operation, allowing the control system to automatically detect the movement's running status and make timely automatic adjustments to ensure stable timekeeping. If the second needle is running, the sub-mother clock system uses closed-loop control to maintain asynchronous operation between the sub-clock and the mother clock. It indicates that if the tower clock's timekeeping is inaccurate, the manufacturer should be contacted for tower clock repair.

• 3. Inspection of Lighting: Tower clocks in buildings are typically outdoor, so lighting is a necessity. The on and off times are automatically controlled by the system.

• Belfry clocks, building tower clocks, rooftop grand chimes, and bell tower clocks maintenance are primarily divided into three parts:

1. The appearance display section includes the face, hands, numbers, and the face's night-lighting. Inspect for rust, check if the face and second-hand are loose, and identify any potential safety hazards. Since the large clock is installed at a height, repairing the appearance is extremely inconvenient, thus selecting a reputable manufacturer and installation crew is crucial.

Two, the electrical part of the grand clock control, which is the brain of the grand clock, has a high technical content. The environment must be well-ventilated and dry, with minimal dust. It requires a high level of technical proficiency from maintenance and service personnel. Generally, certification is required for employment.

Three, the movement core and mechanical transmission part are the executing mechanism of the large clock. The movement cores produced by Yantai Kexin Watch Co., Ltd. use beryllium bronze for bushings and 45 steel that has undergone rigorous mechanical heat treatment, significantly enhancing the core's wear resistance. The fully enclosed design ensures no maintenance or maintenance is required, guaranteeing a lifespan of 50 years.

• In summary, large-scale clocks demand a high level of skill from maintenance personnel. They must possess both electrical and mechanical expertise, be brave yet meticulous, and capable of performing high-altitude work independently. Our company is capable of repairing tower clock equipment from various manufacturers across the nation. We offer free on-site inspections, propose repair plans, and upon customer approval, we sign a quality warranty contract. Products repaired by our company come with a free three-year warranty, during which no additional fees are charged.

Introduction: Yantai Kexin Watch Co., Ltd.: Technology-driven,诚信为本, a technology-based SME in Shandong Province. Products are timely, durable, and energy-efficient. Located in the Economic and Technological Development Zone of Yantai City, the company specializes in the research, design, manufacturing, installation, and maintenance of large-scale special clocks. Main business projects include large clocks for squares, schools, churches, stations, and more across 32 provinces and municipalities. Years of technical accumulation ensures product quality, and our offices and service networks spread throughout the country truly assure customers of a worry-free purchase and comfortable use.

   After-sales Service:

1) Our tower clock equipment comes with a three-year warranty, effective from the date of final project acceptance.

2) Within the warranty period, our company is responsible for free repairs, and after receiving the customer's repair report, we provide a service response time as low as 2-12 hours and arrive at the repair site within 12-36 hours.

3). Post-warranty, we continue to offer repair services at only the cost of parts.

Lifetime free technical consulting and software upgrade services provided.

5) Due to our high level of in-house manufacturing for the tower clock equipment, we can ensure that the provided components will continue to meet standards even after product upgrades and replacements.

6) We conduct a follow-up visit to the equipment we provide every six months.

7) After completion of the repair, introduce to the customer the cause of the incident and the repair process. Fill out the repair record form and have it signed by the customer for acknowledgment. Observe the party for 48 hours and leave upon normal operation.

8) Provide free training for 2 senior system administrators for the grand clock system, along with technical consultation.

9) Seamless Service. With multiple offices and service stations across the country, we offer a service response time as low as 1 hour, ensuring any issues are resolved within 72 hours!

6. Key Functions of Kexin Tower Clock:

1) Time Indication Feature: Features three (or two) hands for hours, minutes, and seconds.

2) Smart Drive Features: 1-32 drives available, with disk diameters ranging from 1 to 10 meters.

3) Automatic Calibration Function: The mother and daughter clock system uses closed-loop control, with the movement feedbacking its timekeeping status for automatic calibration.

4) Automatic Time Sync Function: After power outage, the memory unit automatically stores the sub-clock data, and it will automatically synchronize to standard time within 6 months upon power return.

5) Smart Lighting Function: Automatically turn on and off lighting equipment.

6) Power Failure Compensation Function: The smart core continues to operate normally within 12-24 hours after a power outage, ensuring uninterrupted timekeeping. Automatically adjusts to standard time within 6 months after power is restored.

7) Safety Protection Features: The entire system is powered by a 12V DC safe voltage, providing users with effective safety assurance.

8) Maintenance-Free Feature: The entire tower clock system is designed for longevity and requires no manual maintenance.

9) GPS Satellite Synchronization Function: Real-time reception of the time signals from global positioning system satellites, outputting full-time standard time codes (including date and time), and automatically synchronizing master clock time to eliminate cumulative errors and ensure time accuracy.

10) Synchronization Time Function: The master clock system provides a standard synchronization time signal to other systems.

11) Microcomputer Monitoring Function: The computer employs an Intel 64-bit dual-core processor in conjunction with our self-developed monitoring hardware and software system, enabling comprehensive remote control of the master-slave clock system. It also allows for monitoring and adjusting functions such as timekeeping and bell ringing.

12) Smart Time Announcement Feature: Automatically plays high-fidelity CD-quality music for time announcements, utilizing the iconic British Big Ben chime. Customizable time announcement content is available. The timer for automatic on/off of the time announcement amplifier is also included.

13) Multi-media Time Announcing Function: Equipped with our self-developed multi-media time announcing software, featuring powerful functions and flexible operation. The music library is rich in content, allowing users to change time-announcing settings at any time. Users can announce any music or voice at any desired time, such as: at 6 AM, the "Dongfang Hong" music; at 7 AM, the "Big Ben" music; on May 1st, the song "We Workers Have Strength"; on October 1st, the "March of the Volunteers"; during the Spring Festival, festive music or advertisements like "XX Group extends New Year greetings to all citizens of the city, wishing you all..." etc.