Figure
8-5.
A1
Eight
LEDs'
P
attern
2. Check
Error
Messages
T
urn
the
analyzer
p
o
w
er
on.
Chec
k
no
error
message
app
ears
on
the
LCD.
If
no
error
message
is
displa
yed,
con
tin
ue
with
the
Che
ck
A1
DRAM
and
Flash
Memory
in
this
ST
AR
T
HERE.
If
one
of
error
messages
listed
b
elo
w
is
displa
y
ed,
follo
w
the
instruction
describ
ed
b
elo
w. F
or
the
other
message,
see the
Error
Messages
in
Messages.
Error
Messages
Instruction
POWER
ON
TEST
FAILED
This
indicates
the
p
o
w
er
on
selftest
failed.
Con
tinue
with
the
next
Che
ck Power
On
Selftest
in
the
c
hapter
6.
EEPROM
CHECK
SUM
ERROR
This
indicates
that the
correction constan
ts stored
in the
EEPR
OM
on
the
A1
CPU
are
in
v
alid
or
the
EEPR
OM is
fault
y.
Rewrite all
correction constan
ts
in
to
the
EEPR
OM.
For
the
detailed
pro
cedure,
See
the
A
djustments
c
hapter
in
this man
ual. If the rewriting is not successfully p erformed,
replace the EEPR
OM and then rewrite the all correction
constan
ts in
to the new EEPR
OM.
Svc
(Status Annotation)
This indicates that the correction constan
ts stored in the
EEPROM on the A1 CPU
are in
valid or the EEPR
OM is
faulty
. See the instruction of the
EEPROM CHECK SUM ERROR
message.
POWER FAILED ON - - -
One or some of A2 p ower supplies, +15 V, +8.5 V, +5.3 V,
+5 V, -5 V, -15 V are displayed in
---
of the message.
The displayed p ower supplies are shut down due to the
trouble on the A2 post-regulator. Continue with the
Power
Supply Troubleshooting
chapter.
Digital Control Troubleshooting 8-7
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