Agilent Technologies E8285A Manual page 54

Troubleshooting
Self-Test Diagnostics
Figure 2-6 Reading the Self-Test Diagnostic. The Internal LEDs
1. Remove the Test Set's external cover.
2. Turn power on.
3. Read the LED sequence on the digital
controller board (see below) and compare with
the patterns below.
For multiple failures, the failure patterns
described below will repeat for all failures
detected.
No Failures...
The LEDs will light
for approximately 10
seconds, then all will
turn off.
3
0 1 2
54
S:\agilent\e8285\ALR\Book\chapters\trouble.fm
NOTE
LED Sequences
Failures... three patterns are displayed:
The first blinks rapidly
and indicates the type of
failure.
0 1 2
See the following tables.
(This example indicates
a Serial Bus
Communication
problem.)
Digital Controller Board
DIAG LEDs
0 1 2 3
J1
P2
LED Legend
= off
= rapid blink
= steady on or slow blink
The second and third patterns
blink slowly and indicate
failure details.
3
0 1 2
(This example indicates a
faulty Audio Analyzer 1
assembly.)
P1
controller5.eps
3
3
0 1 2
J4
CAL
MODULE