Roland Dr. Sample SP-303 - Block Diagram

20
Mar.2001 SP-303
BLOCK DIAGRAM
FIG_BLOCK.eps
RIBON CABLE 13P
CPU(I
8M Flash
M
(IC2
4
SP-303 BLOC
K
Adress/Data BUS
4M DRAM
(IC27)
X'tal(
X
TR
A
(IC
Photo
Coupler
(IC25)
MIDI IN
7seg x 3
CHIP LED
VR
(CTL1 ~ 3)
LED DRIVER
(IC33,34.44)
VR5(VOLUME)
COD
E
(IC3
5
LINE IN L
LINE IN R
MIC IN
VR6(MIC VOLUME)
SW BOARD
SW
RIBON CABLE 5P
RIBON CABLE 14P
RIBON CABLE 14P
RIBON CABLE 14P
RIBON CABLE 11P
Peak LED
(LED34)
LOGIC
(IC43)
RIBON CABLE 13P