Casio HT-6000 Operation Manual page 7

Control Locations
(Rear panel)
0
0
MIDI IN/OUT terminals
f)
Tuning control
8
Sustain jack
C>
Foot volume jack
0
Output jacks (R/L)
0
AC adaptor jack
f)
Headphone jack
O
SUSTAIN FOOT VOLUME
ALINE OUTL
G
0
-8-
DC 9V
....
8