HP 8508A - After Service Product Safety Checks; Anti - Static Precautions; Recommended Test Equipment

Service
8-3 AFTER SERVICE PRODUCT SAFETY CHECKS
Visually inspect the interior of the instrument for any signs of abnormal internally-generated heat (such as dis-
coloured printed circuit boards or components, damaged insulations, or evidence of arcing). Determine and remedy
the cause of any such conditions.
Using a suitable ohmmeter, check the resistance from instrument closure to ground pin on the power cord plug. The
reading must be less than one ohm. Flex the power cord while making this measurement to determine whether
intermittent discontinuities exist.
Check line fuse to verify that a correctly rated fuse is installed.
8-4 ANTI-STATIC PRECAUTIONS |
All the printed circuit boards contained in this instrument have components and devices which are susceptible to
damage by electro-static discharge (ESD). To minimize the risk of damaging or decreasing the reliability of the -
instrument, the following procedures and cautions should be observed when servicing the instrument.
Static-free workstation
All servicing should be carried out at a static free workstation.
_ De-soldering 7
When de-soldering components, ensure that the soldering iron is earthed. Always use a metalized solder remover.
Anti-static freezer spray
When attempting to locate a temperature related fault, use caly an approved anti-static freezer spray.
8-5 RECOMMENDED TEST EQUIPMENT
Equipment required to troubleshoot the HP 8508A is listed in Table 1-2. Other equipment may be substituted if it
meets or exceeds the critical specifications listed in the table.
8-2 | E1089
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