Cadillac 1993 Fleetwood Owners Literature page 162

Follow these steps to modify each of the Preset Auto-equalization
buttons.
First, select one of the Preset Equalization buttons.
SEEK
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(3) (2)
(1)
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PRESET EQUALIZATION
1
4
1. Settings Either F (Factory), U (User) or P (Program)
2. Equalization Bands (1 thru 5)
3. Equalization Gain (1 thru 15)
Press the SET button, and then press and hold the Preset Equalization
button you have selected, until either an "F7' or "U" is displayed
(about 10 seconds).
The display will show either 3 or 4 digits and the preset button "LED"
will flash. In the farthest right position of the display will be an "F"
(for factory setting), or if the equalization has been modified, a "U"
(for user setting)
.
Press the SCAN switch up
or
down to select the band you prefer.
The middle digit indicates the equalization band. There are five bands
60Hz, 250Hz, lkHz, 3.5Hz and lOkHz, numbered 1 through
5
respectively. The band will display band 1 when the mode is first entered.
Press the SEEK switch up or down to select the gain setting you want.
The left digit, or two digits are the equalization gain settings (0-15) for
each band. The display will indicate the active setting (F or U) when
the mode is first entered. A typical setting for a flat response is 7.
Press the upper radio knob to compare the factory setting to your
setting. Once you are satisfied with your selection, press and hold the
preset equalization button for about 4 seconds, the" Pr" (program)
will display indicating that your selection is programmed.
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