Manual

5.4 ERROR AND HARDWARE MALFUNCTION MESSAGES
•
Entire Display Flashes
- The watchdog timer has timed out.
•
CPU RAM FAILURE
- IC U1 is bad.
•
ROM CHKS FAILURE
- IC U3 is bad.
5.5 RESETTING THE INSTRUMENT
The instrument can be reset either by cycling the power, or by carefully pressing the reset button
by inserting a thin wire, such as a paper clip, through the small hole in the upper left corner of the
front bezel. (See Figure 1-2 for the location of the reset hole.) When the instrument restarts, it im-
mediately checks to determine if any of the horizontal keypad push buttons are held pressed.
•
If the
1
push button is held pressed during instrument reset, the instrument enters a
factory
test mode.
The test mode can be exited by resetting the instrument again using the thin
wire with no push buttons pressed.
•
If the
2
push button is held pressed during instrument reset, the instrument database is set
to the
defaulted
values.
Section 5. Maintenance
5-3