Block Diagram - Roland Boss ME-50 Service Notes

Feb.2003

BLOCK DIAGRAM

fig.block
JK 1
INPUT
BUFFER
Q1
JK 5
AUX IN
JK 6
CTL1,2
VR 2-5
VR 6-9
VR 10-13
VR 14-17
VR 18-21
EEPROM IC
EXP PEDAL
SW
1-4,6-9
+9.0V
VOLTAGE
REGULATOR
BATTERY
IC19
CN3
RIPPLE
FILTER
JK 7
DC IN
SW5
CONVERTER
Pre Emph
Level CTL
IC2
CODEC
(AD/DA)
IC3
ANALOG
MULTIPLEXER
IC4
ANALOG
MULTIPLEXER
IC7
DSP
ANALOG
IC8
MULTIPLEXER
IC10
FOR IC2, IC3
CPU
FOR ANALOG
IC11
+3.3V
Q9
DC-DC
IC14
DE Emph
BUFFER
Level CTL
IC1
IC18
FILTER
IC5
CRYSTAL
OSCILLATOR
X2
DRAM
IC12
RESET
MUTE CONTROL
Q6
CRYSTAL
OSCILLATOR
X1
LED DRIVER
IC16
LED DRIVER
IC17
JK 2
OUTPUT R
(MONO)
JK 3
OUTPUT L
MUTE
Q2,3
JK 4
BUFFER
PHONES/
(NON INV)
LINE
IC6
MUTE
Q4,5
LED 2-4
LED 6-9
LED 7 SEG
LED 10-21
ME-50
21