There is something wrong with my oscilloscope. I want to try it myself. So in my own words, how do I check where the oscilloscope is malfunctioning? How to repair after checking it out?
1. Read the circuit diagram correctly
Reading the picture correctly is the first step in maintenance work. "Reading" is to fully understand the internal circuit of the oscilloscope according to the electrical schematic diagram, familiar with the working principle and structural characteristics of the circuit, understand the signal generation and transmission process, various changes in current and voltage, the function of each part, and the role of each component Wait
2. Common fault types and maintenance methods of oscilloscope
① The indicator light is off when the power switch is closed. Method: Check the power supply, power cord, fuse, power transformer.
②The indicator light is turned on when the power switch is closed, but there is no scanning light trace.
3 Failure and repair
To repair a faulty oscilloscope, it is necessary to be familiar with the working principle of the oscilloscope, so that the specific part of the fault can be judged by the fault phenomenon, whether it is the power circuit failure, or the scanning, triggering, power amplifier, display circuit failure, grasping the main Contradiction, the fault can be simplified, and then specific to an electronic component to eliminate the fault.