Operation and maintenance methods of endoscope xenon lamp power supply

The power supply of the endoscopic xenon lamp is the core driving unit of the endoscopic cold light source equipment, responsible for providing adaptive electrical energy for the xenon lamp tube, supporting intracavity lighting during clinical examinations and surgical processes. The operation logic, daily operation standards, fault diagnosis, and regular maintenance of the entire circuit will directly affect the stability of endoscopic imaging and the equipment's service life. It is a fundamental link that needs continuous control in clinical equipment management.

Xenon lamp power supply for endoscope

The entire power supply circuit is divided into four complete stages of electrical energy conversion process. After the mains power is connected, it first passes through a filtering and rectification module to filter out the interference of impurities in the grid current and convert the alternating current into stable DC electrical energy. In the second stage, the power correction circuit is used to optimize the efficiency of energy utilization, reduce the harmonics generated during circuit operation, and minimize signal interference with other electronic instruments in the operating room. The third paragraph is the high-voltage triggering module, which generates high-frequency high-voltage pulses at the moment of equipment startup, penetrates the enclosed xenon gas inside the lamp tube, builds a stable arc path, and completes the lamp tube ignition action. After the arc is generated, the circuit automatically switches to the constant current stable arc mode, relying on a closed-loop sampling circuit to collect real-time changes in current and voltage, dynamically adjust the output state, avoid brightness fluctuations caused by the negative resistance characteristics of xenon lamps, and ensure uniform and coherent output light. The entire circuit is equipped with multiple sets of protective circuits, which are respectively set with power-off protection for overcurrent, overheating, and abnormal arc extinguishing scenarios, reducing the probability of damage to the lamp and circuit board.

There are many details in the clinical operation process that are easily overlooked. A standardized operating procedure is formed from startup to shutdown, which can reduce the loss of power circuits and lamps. The device should be placed in a location with ventilation space on all sides, and there should be no gauze, liquid bags, or other items blocking the heat dissipation port around it. Before starting up, observe whether the cooling fan of the device can operate normally. Do not start the lighting program when the fan is stopped. After connecting the power cord, do not immediately trigger the lighting switch. Let it stand for dozens of seconds and wait for the internal circuit to complete the self-test. After the self-test is completed, adjust the brightness level. For first-time use, it is recommended to gradually increase the brightness from low to reduce instantaneous current surges. If the interval between diagnosis and treatment is short, there is no need to turn off the power of the whole machine, just adjust the brightness to a low level; If the idle time exceeds twenty minutes, the power will be completely cut off to reduce the component loss caused by repeated start stop of the high-voltage circuit. After use, do not directly cut off the main power supply. Keep the device powered on and running for several minutes. Use the fan to remove the residual heat from the lamp and power motherboard. Wait until the surface temperature of the device drops before disconnecting the power supply line.

Daily maintenance work is divided into three categories: daily simple inspection, weekly deep cleaning, and periodic component verification. Layered execution can extend the overall service life of the power supply. Complete three basic checks before daily operation, checking for any damage to the outer skin of the power cord, oxidation of the grounding contact of the plug, accumulation of dust in the body's heat dissipation vent, and whether the safety lock of the lamp compartment can be closed properly. Loose locks will trigger the power self-locking protection, resulting in the inability to light up. Clean the exterior of the device every week by cutting off power and wiping the outer shell with a dry, dust-free soft cloth. Use air blowing tools to clean the dust from the ventilation openings to prevent dust from entering the circuit board and causing short circuits; When cleaning the lamp compartment, it is forbidden to directly touch the outer wall of the lamp glass. Skin oil residue will change the heat dissipation efficiency of the lamp and accelerate the blackening and aging of the lamp wall. Every few hundred hours of cumulative usage, check the running time of the lamp tube recorded by the timing module of the body, prepare replacement parts in advance when approaching the usage limit, wipe the metal contacts of the lamp holder synchronously when replacing the lamp tube, remove the oxide layer to ensure stable circuit contact, reset the timing value after replacement and make a written record for easy subsequent fault tracing.

Long term standardized management of endoscopic xenon lamp power supply can not only maintain stable output of endoscopic imaging, reduce operational interference caused by sudden equipment shutdown during diagnosis and treatment, but also reduce equipment operation and maintenance costs caused by frequent component replacement. Establishing standardized operation and maintenance processes is a practical work content in the daily management of medical equipment.