Agilent Technologies HP 8566B Spécifications télécharger pdf (Page 186)

2. High-Voltage Adjustment (SN 3004A and Above)

Discharge Procedure

The High-Voltage Adjustment procedure does not require the removal

for

High

Voltage

and

or discharge of the

AlA

High-Voltage Regulator or

AlVl

CRT

assemblies. However, if for any reason the

AlA

High Voltage

Regulator Assembly, the CRT, or the CRT post-accelerator cable must

be removed, perform the following procedure to ensure proper safety.

Warning

This procedure should be performed by qualified personnel only.

Voltages are present which, if contacted, could cause serious

personal injury. Approximately -2400 V dc can be present on the

AlA

High-Voltage Regulator assembly even when the ac line

cord is disconnected. The CRT can hold a +9500 V dc charge

for several days if the post-accelerator cable is improperly

disconnected.

1. Remove the ac line cord from both instrument sections.

Warning

With the ac power cords disconnected, voltages can still be

present which, if contacted, could cause serious personal injury.

2. Obtain an electrician’s screwdriver which has a thin blade at least

eight inches long. The handle of the screwdriver must be made of

an insulating material.

3. Connect one end of a jumper wire (made of insulated wire and

two alligator clips) to the blade of the screwdriver. Connect the

other end of the jumper wire to the metal chassis of the

IFDisplay

Section. This grounds the screwdriver.

4. Slide the screwdriver’s blade between the CRT and the sheet metal

as shown in Figure 3-15. Gently work the tip of the screwdriver

under the post-accelerator cable’s rubber shroud. Make sure

that the screwdriver’s tip touches the connection between the

postaccelerator cable and the CRT. You should hear a cracking

sound when the cable discharges.

5. Remove the cover from the

AlA

High-Voltage Regulator assembly.

6. Touch the screwdriver’s tip to the top lead of each of the 11 large

vertical capacitors on the

AlA

High-Voltage Regulator assembly.

7. The

AlA

High-Voltage Regulator and

AlVl

CRT assemblies should

now be discharged.

3-46 Adjustments

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 404 405

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