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AM700 Audio Measurement Set Service Manual
In the event that the AM700 should ever go into continuous reset mode or
lockup, it may be caused by an invalid instrument state that is stored in
NVRAM. If this is the case, the problem is cleared by removing the stored states
from NVRAM; restoring factory defaults does not clear the problem. To clear the
NVRAM, use the following procedure to enter the diagnostics mode and run the
utility provided for this task.
NOTE. Clearing the NVRAM also deletes all user-saved files. If you have control
of the AM700 enough to use the memory manager, you may transfer those user
files to DOS for later restoration to the AM700. This may not be possible if the
AM700 is constantly resetting.
1. Turn off the AM700.
2. Press the MENU front-panel button and hold it in while turning on the
power to the AM700. Continue holding in the MENU button until the
AM700 beeps twice. You may release the MENU button after the beeps. The
AM700 then starts up in the low-level diagnostics mode with the following
menu displayed:
--- AM700 STARTUP MENU ---
Key Selection
---------------------------------
H ... Diagnostics -HELP- Menu
R ... Instrument -RUN MODES- Menu
D ... Low Level -DIAGNOSTICS- Menu
U ... -UTILITIES- Menu
F ... -FIRMWARE- Date Codes
--------------------------------------
= ... Reprint @ ... Abort Menu
--------------------------------------
Input your selection:
3. Use the large knob to select U, then press the Select front-panel button to
enter the choice. This brings up the Utilities Menu. There is a difference
between the menus for V1.0/V1.01 firmware and V1.2 firmware. The first
Utilities menu shown is for V1.2 firmware. It has more choices than the
V1.0/V1.01 firmware Utilities menu, shown second.
NVRAM State Clearing