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Perform Selftest
5.
U
sin g the kn ob, select Si gnal
6. Press ειντεR
HP 8110 Α Se rvice Guide
Un exp ected
R
eset of υΡ
R
eset w as ca used by
o
ne of
t
he
f
oll owing:
ι
P
owerup Reset circui t
ι
S
ystem p rotect ion submod ule
h
alt
m
oni tor
ι
l
oss of frequency ref erence to clock
s
ubmodule
ι
l
oss of frequ e n cy reference to test submod ule
N
or mally α reset w oul d
b
e caused by an external
s
ignal or by
t
he CPU
e
xec uting α reset in struct ion
In ternal Serial Devi ce Bu s
f
a il ed
In ternal Serial Devi ce bus traffic over the
f
eedbac k
bu s has
f
ail ed
Signal
B
oards
Selftest
This sect ion in
t
he Se lf test
f
acility tests the Output
B
oard and then
t
he
P
eriod
B
oard .
I
t
i
s not auto matically
r
un at power-up . You can
start thi s part of
t
he Se lftest ro utine as
f
oll ows :
1 . Swi tch
t
he in strum ent ON
2.
W
ai t
f
or the Mi croprocessor Selftest to fini sh
3.
P
ress ηποRε and CO NFIG
4.
U
sin g the cursor key s m ove the hi ghlight do wn to
P
erio d Board Selftest
F
igure 4-1 shows the Se lftest points on the
P
eri od
B
oard . This
i
s
f
ollowed by α list of
t
he
p
ossibl e
f
ailure
m
essages.
TO
C
H
A
NNEL
2 ι
ι
ΜΒ_S NSCHAN
ι
D
ES K EW
TO CHANNEL 1
B
OA RD
ΜΒ _S NSCHAN 1
TIGER IC
TRIGGER OUTPUT
AMPLIFIER
TO TR IG OU T
ΜΒ_S NST GT R IG
ΜΒ_SNSTRGOUT
Fig ure 4-1 . Testpoints use d in
P
erio d Boa rd Selftest
Troubles hooti ng
4- 3
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