HP 3562A Service Manual page 364

MO D E L 3562A
7-1 INTRODUCTION
This section contains the i nformation req u i red to isolate fai l u res to the c i rcuit board level.
To accom p l ish this, exte ns ive use is m ade of the power-u p tests and the self-tests. After
iso lati ng the fai l u re to an assembly go to Section V I I I , "Service" to conti nue the fai l u re
iso lation process.
The fau lt isolation p roced u re assu mes only one i ndependent fai l u re. M u ltiple fai l u res may
cause false resu lts i n the d i agnostic tests.
How To Use This Section
Start
Reference
SECTION VI I
FAULT ISOLAT I O N
If the d i sp lay and soft keys are ope rative, go to paragraph 7-7, "Test
A l l".
If the i nstru ment is d isplaying the 'MON I T O R T E ST LOG' or
'PROG RAM ROM DEAD', go to paragraph 7-5, "I n itial Cond itions Test" .
I f there is no d i s p l ay, i n correct disp l ay, or the i n stru ment d oes not
respond when a key is pressed, go to paragraph 7-5, " I n itial Cond itions
Test".
For c h i rp and n o ise source fa i l ures, go to paragraph 7-9, "Sou rce
Fai l u res".
For trigger fai l u res, go to paragraph 7-1 1 , " I solating T rigger F a i l u res".
For H P- I B fa i l u res, go to paragraph 8-6, ",A,2, , A,22 System C P U/H PI B",
For i nterm itte nt fai l u res, go to paragraph 7-1 2, " Loop Mode and
For compon ent locators and schematics refer to Section I X .
For the location of cables and boards refe r to f i g u re 4-1 i n Section IV.
To find a parti cu lar soft key refer to paragraph 7-1 4, IISPC L FCTN Key
Map".
To find the software revision code, refer to part B of paragraph 7-1 5,
"Test Log and F a u l t Log Descriptions"
To u nderstand the self-d iagnostic process, refer to paragraph 7-1 6,
" D iagnostic Descri ptions".
FA U LT I SO LAT I O N
7-1