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6. PRECAUTIONS
To prevent damage of the thermal head caused by static electricity when assembling the chassis ass�y into the unit, the following steps must be followed; 1. 2. 3. 4. 5. Turn the power switch off. Discharge the capacitor C302 on the PCBZ570-3. Connect the FPC of chassis ass�y into a connector CN301 of PCBZ570-3. Assemble the chassis ass�y. Turn the power switch on.
Chassis ass�y
Setting the thermal head rank Set the thermal head rank with pads RNK1 and RNK2 on the PCBZ579-1 according to the following conditions when replacing the chassis ass�y or thermal head. The head rank is indicated on FPC as following. Head rank A: Head rank B: Head rank C: Head rank D: RNK1 = SHORT, RNK1 = OPEN, RNK1 = OPEN, RNK1 = SHORT, RNK2 = OPEN RNK2 = SHORT RNK2 = OPEN RNK2 = SHORT
