Notes for main pcb

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asked Feb 25, 2021 in H&E by MayNa (420 points)

Always follow ESD precautions when handling master PCBs.Although the main PCB can resist electrostatic discharge, there is still the possibility of damage to electronic components.Do not operate the main control panel without turning off the power of the machine.Although the input voltage to the PCB is only about 36V DC, processing the PCB while the PCB is still powered on can short-circuit components and severely damage the PCB.

 

The main control panel can only be replaced after other components have been excluded in the electrical troubleshooting step because of machine failure or obvious defects in the main control panel.Customer maintenance personnel can safely perform this process as long as necessary precautions are observed.Before replacing the motherboard, it is strongly recommended to discuss with the new MelBoa technical support, as other causes may cause machine failure, which may look like a motherboard failure, but may actually be electrical short circuit of harness, software damage, etc.

Replacement parts:

Thermal pads must always be installed on the four flat pad supports below the main PCB.If these components are removed or not installed, the master board will be short-circuited and the components will be burned out.There is no need to replace the spacer unless it is damaged or removed for some reason.

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