Fluke 8506A Instruction Manual page 144

STEP
MO.
ACTION
Go
to
tf
1
number
for
co
respa
B^|(
1,
Push
POWER
ON. The
following
should be
displayed:
HI
—
Y.Y.Y (Y
=
Software Number)
CXXXXXA
(X
=
Option
Number)
0.000
(DC
Volts,
1000V
range,
sample
7, filter
F0)
2. Is
the
display
blank? 6
3.
is
the
initial
display other than
HI—Y.Y.Y?
42
4.
Is
the reading other than 0,000 ±.005? 59
5.
Are
the
first
three displays
normal?
78
Remove
Isolator.
Turn power ON.
Is
HI-Y.Y.Y,
then
CXXXXXA,
then
error 9
displayed?
8
11
Install
interconnect-monitor
in
the isolator
slot. Is
HI—Y.Y.Y
displayed?
10
13
Bad
isolator.
Go
to
Section 8 under
isolator,
is
the
power
indicator
on?
17
12
Check
the
fuse,
is
it
bad
(replace)?
1
17
Remove
Cal
Memory
chip and remote
interfaces
if
installed.
Is
HI—Y.Y.Y.
displayed?
14
17
Replace Cal
Memory
chip.
Is
HI—Y.Y.Y
displayed? 16
15
Bad
Cal
Memory
chip.
Replace
EEROM.
Bad Remote
Interface.
Go
to
Section
6
under
the appropriate
interface.
Install
the Interconnect-Monitor
PCB
in
the
Isolator
slot.
Check power
supply
voltages as
follows.
Test
DMM
Common
to
VSS.
VDD =
+11.4
to
+12.6
VCC =
+5.15
to
5.25
VGG
=
-1 1.4 to
-12.6 LINE
-
13V ac
to
17
V
ac
(100 or
120V
AC), or
6.5V ac
to
8.5V ac (220 or
240V AC)
Are
the
power
supplies within tolerance?
26
20
Remove
ail
modules
except
the
Front Panel.
Recheck power
supplies.
Within tolerance? 22
23
Replace modules one
at
a
time
(start
with
Controller),
rechecking supplies
after
replacing
each module.
The
last
one
put
in
when
the supplies
go bad
is
the
problem.
Go
to the
appropriate
figure or table for that
module.
Remove
the front panel.
Recheck
supplies.
Within
tolerance?
25
24
Problem on power
supply,
motherboard,
or
power
supply
interconnect.
Bad
Front Panel.
Go
to
Table 4-21.
Remove
Cal
Memory
chip
and
the
remote
interface
if
installed.
Check
1C
6, 5, 1,
0 on
interbus.
All
moving?
28
30
4-30