Diamond Systems MM-HP - Manual (Page 5)

CRYSTAL-MM-HP User Manual v2.0 September 2007 Diamond Systems Corporation P. 5
3. I/O Header and Jack Pinouts
In the header pinouts described below, note that the audio speaker amplifier outputs appear on three
headers: J3, J4, and J5. Also note that Line In has two connection points (J4 and J6) and Line Out has
two connection points (J4 and J5).
Configuration information for all headers is shown on pages 8-10.
Caution: Only one Speaker connection may be used at one time. If more than one
connection is used, the load impedance on the audio amplifier will be too low, and
the audio amplifier could be damaged.
Caution: Only one Line In connection may be used at one time. If more than one
connection is used, the line impedance will be too low. This could cause distortion or other
malfunction.
Caution: Only one Line Out connection may be used at one time. If more than one
connection is used, the line impedance will be too low. This could cause distortion or other
malfunction.
J3: Speaker connections with optional volume control, 2x5-pin right-angle header
Volume Left Out 1 2 Volume Left In (Wipe)
Analog Ground 3 4 Volume Right Out
Volume Right In (Wipe) 5 6 Analog Ground
Speaker Out Left + 7 8 Analog Ground (Speaker Out L -)
Speaker Out Right + 9 10 Analog Ground (Speaker Out R -)
This header enables the user to control volume with an external stereo 100K
Ω potentiometer. The output
volume on each channel is directly proportional to the resistance between the wiper for that channel and
ground.
J4: Main I/O header, 2x10-pin right-angle header
Speaker Out L + 1 2 Analog Ground (Speaker Out L -)
Speaker Out R + 3 4 Analog Ground (Speaker Out R -)
CD In L 5 6 CD In R
Mic In + 7 8 Analog Ground (Mic in -)
Line In L + 9 10 Aux In L
Line In R + 11 12 Aux In R
Line Out L + 13 14 Analog Ground (Line Out L -)
Line Out R + 15 16 Analog Ground (Line Out R -)
Digital Ground 17 18 Mute Input
Volume Up Input 19 20 Volume Down Input
This header provides connections to all the most commonly used I/O signals on Crystal-MM-HP. The
notations next to the various analog ground pins shows the preferred / conventional connections for those
signals.