Maintenance of Leeb hardness tester

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Repairing Leeb hardness tester can generally be solved by the following methods, metal hardness tester can not be resolved which should be returned for the manufacturer.First, the hardness value is not accurate, the error is about 50HL.digital hardness tester can be gradually checked and eliminated in several steps: 1) Supply voltage: first check whether the power supply voltage of the Leeb hardness tester is normal; 2) impact device: remove the parts of the impact device, clean the dust or dirty things; 3) control circuit: Control internal circuit components have damage or change value, need to return to factory maintenance.

Second, the LCD screen font of Leeb hardness tester is missing 1) Unpack the Leeb hardness tester and reinsert that drive the LCD screen several times (In some Leeb hardness testers, these ICs barcol hardness testing use the IC holder to fix the IC). Exclude the IC pin from poor contact due to oxidation. 2) LCD panel internal damage, need to be replaced.

Third, the LCD screen of high quality hardness tester does not show numerical value when playing hardness.1) whether the impact device is in the poor condition. Conversely, if the impact device is damaged that replace it. 2) The internal circuit of the Leeb hardness tester is faulty and must be returned to the factory for repair.

Fourth, print data overlap by paper jam problems,hardness tester with thermal printer remove the print paper tray cover, and reinstall the paper to eliminate this problem.

Fifth, black screen

Measuring the power supply voltage is normal, otherwise the circuit is faulty, need to return to the factory maintenance.