HP 3562A Service Manual page 451

MOD E L 3562A
8-11 INTRODUCTION
T h i s section contains a l l the information req u i red to isolate fai l u res to the component
leve l . Use this section after using the fau lt isolation proced u res i n Section V I I . This section
is used to isolate a fai l u re to the s u bb lock l evel . Each f u n ctional s u b b l ock cons ists of
a smal l n u m ber of com ponents, and the tec h n i c i a n's expertise is re l ied upon to isolate
the fau lty com ponent.
How to Use This Section
Start
Reference
Keys
Loop Mode
A fter completing a test or repa ir, check that a ll jumpers are in the
NORMA L or R UN position and that a ll cables are conn ected.
SECTION VI I I
SERVICE
After isolating the fault to an assembly, go to the troubleshooting
procedures for that assembly. The troubleshooting i nformation is l isted
i n order of the c i rc u it board assem bly n u m ber, A1 through A33 .
U s e the component locators a n d schematics i n Section I X with each
of the tro u b l es hooting p roced u res.
For the location of cables and boards refer to f i g u re 4-1 i n Section IV.
For the c i rc u it block d i agrams refer to Section V I .
T o u nderstand the i n strument's operation and signal m nemonics refer
to Section V I .
There are two types of keys o n the H P 3562A, hard keys and soft keys.
I n this section the hard keys are in bold text, and the soft keys are
in regu lar text.
For exam ple:
. . . . . . . . . . . . . .
F REQ
T h i s exa m p l e instru cts you to press the hard key F R E Q and the soft
key FREQ SPAN. After pressing the soft key FREQ SPAN enter 1 0 k H z .
T h e loop mode is used for some s ignatu res analysis tests and to find
i nterm ittent fai l u res. For description of the loop mode refer to
paragraph 7-1 2, " Loop Mode and I nterm ittent Fai l u res".
NOTE
F R E Q S PAN
. . . . . . . .
S E RV I C E
. . 1 0 kHz
. . . . . . . . . .
8-1