Block Diagram - Roland Dr. Sample SP-303 Service Notes

Mar.2001

BLOCK DIAGRAM

FIG_BLOCK.eps
LINE IN L
LINE IN R
20
MIC IN
MIDI IN
Photo
Coupler
(IC25)
VR5(VOLUME)
SW
Peak LED
(LED34)
VR
(CTL1 ~ 3)
LED DRIVER
(IC33,34.44)
CHIP LED
7seg x 3
SW BOARD
VR6(MIC VOLUME)
RIBON CABLE 5P
RIBON CABLE 13P
LOGIC
(IC43)
RIBON CABLE 13P
RIBON CABLE 14P
RIBON CABLE 14P
RIBON CABLE 14P
Adress/Data BUS
4M DRAM
(IC27)
RIBON CABLE 11P
SP-303 BLOCK
SP-303
CODE
(IC35
X'tal(X
CPU(I
8M Flash M
(IC24
TR A
(IC