A customer from Hebei called to inquire about a gastrointestinal machine collimator that is broken, but is it not our company's product that can be repaired? We said that it can be repaired. The engineer went to the customer's location to perform the repair. Let's share the repair case with you.
The customer said that when the gastrointestinal machine vertically divides the film, there is repeated exposure, and the film is half normal and half blurred. Exposure under simulated vertical division conditions, it is found that the light beam cannot be closed on the left and right sides. When the exposure is adjusted to four divisions, the collimator is closed up and down, but the left and right sides still cannot be closed. Under fluoroscopy conditions, manually adjust the beam beam, the collimator can work normally. Therefore, the analysis is that under the spot condition, the collimator adjuster circuit is faulty.
Open the cover under the film supply box and the receiver box. There are five layers of circuit boards inside. According to the circuit board serial number shown in the circuit icon, find the collimator up and down and left and right to close and open the control module. After disassembling it, there is no obvious appearance abnormality. Measure the components on the circuit board that control the up and down, left and right closed and open loops of the collimator, and expose under the vertical grid condition. Check the closed and open conditions of the collimator. The beam beam has corresponding changes when the collimator is closed and opened to determine the fault. The 3VR resistance offset of the machine-controlled adjustment potentiometer. Replace the potentiometer of the same model, adjust the resistance value, re-test the machine, click the film under the conditions of vertical division, horizontal division and four divisions, the image is normal, and the machine returns to normal.
The products produced by Newheek mainly include: X-ray image intensifier TV system, high-voltage power supply, hand switch, foot switch, high-voltage cable, collimator, photography flat bed, mobile flat bed, etc., among which, X-ray shadow Intensifiers, hand switches, and high-voltage cables have obtained CE and ROHS certificates. Internationally, the products are exported to more than 100 countries and regions. At present, the company is developing dynamic DR flat panel detectors, striving to break the foreign technology monopoly. We undertake maintenance of various instruments and equipment, and friends are welcome to call and negotiate.
Open the cover under the film supply box and the receiver box. There are five layers of circuit boards inside. According to the circuit board serial number shown in the circuit icon, find the collimator up and down and left and right to close and open the control module. After disassembling it, there is no obvious appearance abnormality. Measure the components on the circuit board that control the up and down, left and right closed and open loops of the collimator, and expose under the vertical grid condition. Check the closed and open conditions of the collimator. The beam beam has corresponding changes when the collimator is closed and opened to determine the fault. The 3VR resistance offset of the machine-controlled adjustment potentiometer. Replace the potentiometer of the same model, adjust the resistance value, re-test the machine, click the film under the conditions of vertical division, horizontal division and four divisions, the image is normal, and the machine returns to normal.
Post time: Nov-17-2021