HP 3562A, Руководство по обслуживанию

Страница: 451 / 570

MOD E L 3562A
S E RVICE
SECTION VIII
SERVICE
8-11 INTRODUCTION
This section contains all the information req u i red to isolate fai l u res to the component
level. Use this section after using the fau lt isolation procedures in Section V I I . This section
is used to isolate a fai l u re to the subblock level . Each functional subblock consists of
a smal l number of com ponents, and the technician's expertise is rel ied upon to isolate
the fau lty component.
How to Use This Section
Start
Reference
Keys
Loop Mode
After isolating the fault to an assembly, go to the troubleshooting
procedures for that assembly. The troubleshooting information is l isted
i n order of the circ u it board assembly n u m ber, A1 through A33.
Use the component locators and schematics in Section IX with each
of the troubles hooting procedu res.
For the location of cables and boards refer to figure 4-1 in Section IV.
For the circ u it block diagrams refer to Section V I .
T o understand the instrument'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 example:
F REQ
. . . . . . . . . . . . . . . . .
FREQ SPAN
. . . . . . .
.
. .
.
. . . . . .
10
kHz
This example instru cts you to press the hard key
FREQ
and the soft
key FREQ SPAN. After pressing the soft key FREQ SPAN enter 1 0 kHz.
The loop mode is used for some signatu res analysis tests and to find
interm ittent fai l u res. For description of the loop mode refer to
paragraph 7-1 2, " Loop Mode and I nterm ittent Fail u res".
NOTE
A fter completing a test or repa ir, check that all jumpers are in the
NORMAL or R UN position and that all cables are connected.
8-1