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Troubleshooting
Self-Test Diagnostics
Table 2-1
Return Values for Self-Test Diagnostic Failures
Microprocessor
ROM
RAM
RAM
Timer
Real-Time Clock
Keyboard (stuck key)
RS-232 I/O
Serial Bus Communication
Signaling Board Self-Test
Display Drive Self-Test
Miscellaneous Hardware
a. Could also be the digital controller with a faulty key-down detector.
b. This checks the ability of the digital controller to communicate with any hardware on the bus.
This message occurs if expected hardware is absent or not responding to the digital controller.
c.
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S:\agilent\e8285\ALR\Book\chapters\trouble.fm
Detected Failure
Failed Assembly
Digital Controller
Digital Controller
Memory/SBRC
Memory/SBRC
Controller
Memory
a
Keypad
Memory/SBRC
Any Non-Optional assembly
Signaling Source/Analyzer
Display Drive
Several Possible Assemblies
Returned Error Code
Hexadecimal
(displayed)
0002
0004
0008
0010
0020
0040
0080
0100
b
0200
0400
0800
c
1000
Decimal
(GPIB)
2
4
8
16
32
64
128
256
512
1024
2048
4096
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Table of Contents
Troubleshooting
