Voltage stabilized power supply circuits in the actual production of the safety protection of equipment has a special role, and the purchase of voltage stabilized power supply circuits expensive, so people try to go as well as the assembly of voltage stabilized power supply circuits. Then in the process of assembly is particularly vulnerable to safety accidents, non-professional operation has a great deal of danger.
We need to pay attention to the following points in the installation process of the regulated power supply circuit:
(1) Install the four diodes horizontally in order. It is worth noting that the installation of the diodes must adhere to the positive in and negative out, otherwise it will lead to a short circuit and cause fire and other unsafe accidents.
(2) Install a voltage regulator with horizontal mounting. It is worth noting that the voltage regulator must be installed horizontally, otherwise it will lead to subsequent voltage instability and damage to other parts.
(3) Install a resistor with horizontal mounting. This must be kept horizontal, otherwise the resistance value of the resistor will be uneven, suddenly large and small, resulting in unstable current. This will damage the parts.
(4) Install another resistor by vertical mounting.
(5) Install a capacitor by vertical mounting. At this moment, if not installed vertically, then the circuit capacitance will become smaller, resulting in difficulty in starting the circuit, the regulated power supply can not work, and serious damage to the machine.
(6) Connect the three external wires on the circuit board to the external interface.
(7) Install a heat sink on the circuit board to avoid overheating and unsafe accidents.
(8) After everything is installed, the power cord and the fuse must be connected to prevent safety hazards. In the event of a problem with the circuit, there can be
(9) Make sure that everything is installed in place, and then you can install the shell, at this point, all the work is done.
(10) After completing all this work it is necessary to make sure that the entire component is absolutely clean, otherwise it can cause the wiring to heat up and lead to unsafe events.
(11) It is necessary to install insulating devices on the bottom of the component, such as plastic feet, or ceramic feet. We generally use three bottom feet of the installation method, which can ensure stability, while doing to prevent electric shock. (12) before the power experiment, must ensure that all circuits are not short-circuit conditions occur, you can choose the current indicator pen for testing. This work must be carried out carefully, is the final stopping point of all safety issues.(13) Use a multimeter to measure the output voltage and current and the total resistance of the device, if there is an abnormality, you must immediately stop the experiment, disassemble the device to recheck.
The above is based on my own experience of the regulated power supply circuit components assembly, which the safety issue I hope you can pay attention to, be sure to operate in accordance with the process, otherwise it will cause insecurity and hidden danger. I hope to help you.