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5-8 Handling Precautions
• Turn the power OFF before replacing the Unit.
Note Before restarting operation, transfer the contents of the DM and HR areas to the
CPU Unit that was changed and then start operation.
• If a Unit is found to be faulty and is replaced, check the Unit again to ensure
there is no error.
• When returning a faulty Unit for repair, make a detailed note of the Unit’s mal-
function and take it together with the Unit to your nearest OMRON office or
sales representative.
• If a contact is not good, put some industrial alcohol on a clean cotton cloth and
wipe the surface. After doing this, install the Unit.
Standard Tools
• Screwdrivers (Philips and flat-blade)
• Voltage tester or digital voltage meter
• Industrial alcohol and a cotton cloth
Measurement Devices
• Synchroscope
• Cathode-ray oscilloscope
• Thermometer, hydroscope
Note Do not take apart, repair or remodel the PC in any way.
Necessary Tools for
Inspection
Handling Precautions
Section 5-8