HP 3562A Service Manual page 366

MOD E l 3562A
7-2 RECOMMENDED TEST EQUIPMENT
The recommended test eq u ipment for trou bleshooting is l i sted in tab le 1-4. Any item which
meets or exceed s th e criti cal req u i rements can be su bstituted for the model l i sted. These
p roced u res are des igned to be run with a m i n i m u m amou nt of equ i pment.
7-3 LOGIC CONVENTIONS
Pos itive logic convention is used in this m a n u a l u n less otherwise noted. Pos itive logic
co nventions define a logic "1 /1 or "H igh/l as more pos itive voltage and a logic "0" or " Low"
as the more negative voltage.
7-4 SAFETY CONSIDERATIONS
T he HP 3562A is a Safety C l ass 1 instru ment (p rov ided with a protective earth term i n al).
The instru ment and manuals shou ld be reviewed for safety marki ngs and instructions before
operation. Refer to the safety sym bol tab le in the preface of this m a n u a l .
Servi
the protective co vers removed and power applied. Hazardous
voltage and energy available at man y points can, if contacted, result
in personal injury.
Do not insert or remove any circuit board in the HP 3562A with
the line power turned on. Power trans ients caused by insertion or
removal ma y damage the circuit boards.
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the line switch in the o ff position and the power cord removed.
Be extremely careful when work ing in the po wer supply area. This
h igh voltage co uld cause serious personal injury if con ta cted. To
discharge the capacitors holding th is charge perform steps 1
thro ugh 3.
1 .
2 .
3.
capa citors to discharge.
WARNING
�
e procedures described in this section are performed with
CA UTION
WARNING
.
Remove the power cord from the rear panel.
Remo ve th e bottom co ver and power sup
Wait two m inutes a fter turn ing the power off to a llow the
FAU LT I SO LAT I O N
·
ply shield.
7-3