Agilent Technologies 8753ES Option 011 Service Manual page 225

Identify the Stuck Key
Match the front panel LED pattern with the patterns in
identifies the stuck key. Free the stuck key or replace the front panel part causing the
problem. (The Chan 3 and Chan 4 LEDs are not used. ✸ = LED is on. The foots witch is an
accessory that can be set up through a rear panel port.)
Table 6-1 Front Panel Key Codes
Decimal
Number
Chan 1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Chapter 6
LED Pattern
Chan 2 R L
✸
✸
✸
✸
✸
✸
✸
✸
✸ ✸
✸ ✸
✸ ✸
✸ ✸
✸
✸
✸
✸
✸ ✸
✸ ✸
Digital Control Troubleshooting
Front Panel Troubleshooting (A1, A2)
Table 6-1. The LED pattern
T S
G/n
✸
9
✸
M/µ
✸ ✸
6
k/m
✸
3
✸
x1
✸ ✸
−
8
✸
7
✸
5
✸ ✸
4
2
✸
1
✸
.
✸ ✸
0
Footswitch
✸
✸
←
✸ ✸
Local
System
✸
Seq
Key
6-13