Hitachi RAS-18CH7 Service Manual page 4

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(6) Use a three wire type soldering iron including a grounding wire.

Metal plate (of aluminium, stainless steel, etc.)

Bare copper wire (for body earth)

Screw stop at the screwed

part using a rag plate

Use a high insulation mode (100V, 10M

(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of the

measuring instrument shortcircuit a load circuit or the like.

Staple

Fig. 3. Grounding of the working table

Soldering iron

Fig. 4. Grounding a soldering iron

or higher) when ordinary iron is to be used.

– 2 –

Working

table

Resistor of 1 M

(1/2W)

Earth wire

Grounding

wire

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Rac-18ch7 Ras-24ch7 Rac-24ch7