Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, and 1275

Typical Electrostatic Voltages

 

 

 

Relative Humidity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Event

 

10%

 

 

40%

 

55%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Walking across carpet

 

35,000 V

 

 

15,000 V

 

7,500 V

 

 

 

 

 

 

 

 

Walking across vinyl floor

 

12,000 V

 

 

5,000 V

 

3,000 V

 

 

 

 

 

 

 

 

Motions of bench worker

 

6,000 V

 

 

800 V

 

400 V

 

 

 

 

 

 

 

 

Removing DIPS from plastic

 

2,000 V

 

 

700 V

 

400 V

tubes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Removing DIPS from vinyl trays

 

11,500 V

 

 

4,000 V

 

2,000 V

 

 

 

 

 

 

 

 

Removing DIPS from Styrofoam

 

14,500 V

 

 

5,000 V

 

3,500 V

 

 

 

 

 

 

 

 

Removing bubble pack from

 

26,000 V

 

 

20,000 V

 

7,000 V
PCBs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Packing PCBs in foam-lined box

 

21,000 V

 

 

11,000 V

 

5,000 V

 

 

 

 

 

 

 

 

Return to Removal & Replacement Procedures

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