Power-On Configuration Key Sequences - GRE PSR-500 Owner's Manual

Power-On Configuration Key Sequences
Your PSR-500 features power-on keypress sequences that are
used as shortcuts to configuration items, like attenuator settings,
backlight settings and memory information. Power-on key
sequences are also used to place your scanner into firmware
upgrade mode for CPU and DSP firmware upgrades.
The following table lists the power-on key sequences available in
the PSR-500. Unless otherwise specified, each sequence is
invoked by pressing and releasing each key in sequence, one at
a time. The first key must be pressed while the Welcome/Owner
screen is being displayed:
PSR-500 User Manual Page 93