Agilent Technologies 5517B Operation And Service Manual page 59

WHEN THE HP 5517B COVERS ARE REMOVED, THE HIGH VOLTAGE POWER SUPPLY (HVPS), A2, IS
DISCONNECTED AUTOMATICALLY BY A1S1. FOR ADJUSTMENTS AND SERVICING PURPOSES, THE
HIGH VOLT-AGE POWER SUPPLY CAN BE RE-ENABLED BY SETTING THE TEST-NORM SWITCH, A1S2, TO
TEST AFTER THE 5517B COVERS ARE REMOVED.
Paragraph 8-56. Assembly Removal Instructions: Add the following WARNING:
HIGH VOLTAGES ARE GENERATED WITHIN THE LASER HEAD HOUSING.
THE COVERS OF THE LASER HEAD CONTROL A SAFETY INTERLOCK
SWITCH
VOLTAGES. TO ENSURE SAFETY AND AVOID POSSIBLE EQUIPMENT
DAMAGE, HOWEVER, ALWAYS DISCONNECT THE POWER SOURCE FROM
THE LASER HEAD BEFORE REMOVING THE COVERS.
Paragraph 8-69,
Add the following step between steps c and d:
Enable the laser's high voltage section by setting the TEST-NORMAL switch (A1S2) on A1 Connector Board to Test.
Change step h to read as follows:
h. Disconnect the test equipment and set HEATER jumper to JMP 7 to NRM. Set TEST-NORM switch to NORM
and replace HP 5517B covers.
Paragraph 8-73: HP 5517B Trouble Isolation Procedure Change
WARNING to read as follows:
WITH THE HP 5517B COVERS REMOVED AND A1S2 SET TO THE TEST
POSITION, VOLTAGES OF UP TO 12 KV WILL PRESENT AT THE OUTPUT
OF THE HIGH VOLTAGE POWER SUPPLY ASSEMBLY A2.
Add the following NOTE and figure after the WARNING:
AFTER SERVICING THE HP 5517B, BE SURE TO SET A1S2 TO THE NORM POSITION, OTHERWISE POWER
TO THE HVPS WILL BE DISCONNECTED.
(A1S2) TO PREVENT
WARNING
ACCIDENTAL ACCESS
WARNING
NOTE
TO THESE
7-3