Table 6-12: List Of Error Codes - Tektronix TDS2022C Technical Reference

Maintenance
Troubleshooting the USB
Interface
Using the Error Log
6–38
1. Remove the rear case. (See page 6-10, Rear Case.)
2. Check that the coaxial connections to the back side of the BNC connectors are
intact. Use the DMM to measure continuity from the front side of the BNC
connector to the point where it attaches to the Main board.
NOTE.
The ground side of the BNC has three connections (two mounting lugs
and one signal wire) while the center connection has one. Incomplete or poor
connection of the ground side may cause AC signal quality problems without
affecting DC measurement capability.
3. If no problem is found and the trouble persists, the Main board is probably
defective in some way that the internal diagnostics cannot detect. Replace it.
To troubleshoot the USB interface, if the acquisition is working, and the USB is
not, replace the Main board.
Failures that occur during the power-up diagnostics or normal oscilloscope
operation place an entry in the error log.
Accessing the error log. The error log list can be accessed anytime by pushing the
UTILITY button and selecting Error Log.
The following table lists the error codes and probable causes. (See Table 6-12.)

Table 6-12: List of error codes

Error code Description
0 DI Diagnostics internal error
1 DI ADG522 diagnostics failed
2 DI PROM diagnostics failed
3 DI MEMORY diagnostics failed
4 DI Ch 1 diagnostics failed
5 DI
Ch 2 diagnostics failed
6 DI Line trigger diagnostics failed
7 DI ADG421 diagnostics failed
12 DI Ch 3 diagnostics failed
13 DI Ch 4 diagnostics failed
14 DI ADG421 #2 diagnostics failed
15 DI
ADG522 #2 diagnostics failed
16 DI DRAM2 diagnostics failed
17 DI USB diagnostics failed
255 Software
Probable cause
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Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
Main board or power supply failure
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TDS2000C Series Oscilloscope Service Manual