Boss ME50 Schematic
Feb.2003
TABLE OF CONTENTS
SPECIFICATIONS.............................................................2
LOCATION OF CONTROLS ..........................................4
LOCATION OF CONTROLS PARTS LIST ................... 4
EXPLODED VIEW ............................................................ 6
EXPLODED VIEW PARTS LIST ..................................... 8
PARTS LIST......................................................................10
CHECKING THE VERSION NUMBER....................... 13
ME-50
SERVICE NOTES
Issued by RJA
RESTORING THE FACTORY SETTINGS...................13
TEST MODE..................................................................... 13
BLOCK DIAGRAM......................................................... 20
CIRCUIT BOARD............................................................22
CIRCUIT BOARD............................................................24
CIRCUIT DIAGRAM......................................................26
Copyright © 2003 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.
Printed in Japan (0800) (AS)17058813E0
Feb.2003
SPECIFICATIONS
ME-50: Guitar Multiple Effects
AD Conversion
24 bit + AF method (*)
DA Conversion
24 bit
Sampling Frequency
44.1 kHz
Patches
30 (user)
Effects
Tone Modify
Compressor
Overdrive/Distortion
Chorus
Phaser
Flanger
Harmonist
Tremolo
Pan
Vibrato
UNI-V
Rotary
Delay
Reverb
Noise Suppressor
(Effects for Expression Pedal)
Foot Volume
Wah
Resonance
Voice
Ring Modulator
Bend (+1 OCTAVE, -1 OCTAVE)
Power Supply
DC 9 V: Dry batteries (R6/LR6 (AA) type) x 6, AC Adaptor (PSA series:
Optional)
Current Draw
120 mA
* Expected battery life under continuous use:
Carbon: 3.5 hours
Alkaline: 12 hours
These figures will vary depending on the actual conditions of use.
Dimensions
384 (W) x 225 (D) x 102 (H) mm
15-1/8 (W) x 8-7/8 (D) x 4-1/16 (H) inches
Weight
3.15 kg / 7 lbs (including batteries)
Accessories
Owner’s Manual ENGLISH :(#G6017362)
JAPANESE :(#G6017361)
Dry Batteries (Alkaline: LR6 (AA) type) x 6:(#********)
Options
AC Adaptor: BOSS PSA series
Foot Switch: BOSS FS-5U
* 0 dBu = 0.775 Vrms
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.
* AF method (Adaptive Focus method)
This is a proprietary method from Roland that vastly improves the signal-tonoise (S/N) ratio of the A/D and D/A converters.
Nominal Input Level
INPUT: -10 dBu
AUX IN: -10 dBu
Input Impedance
INPUT: 1 M ohms
AUX IN: 100 k ohms
Nominal Output Level
-10 dBu
Output Impedance
2 k ohms
Display
7 segments, 1character LED
Jacks
INPUT jack
GUITAR AMP jacks L(MONO)/R
AUX IN jack (Stereo Mini type)
PHONES/LINE OUT jack
AC Adaptor jack
2
ME-50
3
Feb.2003 ME-50
LOCATION OF CONTROLS
fig.panel
25
24
23
2122
20
19
2,4
3,4
5,6,18
2,4
3,4
1
17,18
15,16
14
13
1
12
29
1
7
8
26
9
10
LOCATION OF CONTROLS PARTS LIST
NO PART CODE PART NAME DESCRIPTION
1 1502928100 LED (RED) L-34HDSL
2 F3279803 POTENTIOMETER 11 CLICKS 50KB RD901-40-125F-B54-11D
3 F3279802 POTENTIOMETERNO CLICK 50KB RD901-40-125F-B54-00D
4 G2477122 R-KNOB
5 F5029117 LED L-312LRD
6 G247751001 VGA KEYTOP S BLACK WITH LENS
7 G2027904 TOP COVER
8 G2187193 BOTTOM COVER
9 G2187602 SWITCH PEDAL
10 G2227301 PEDAL ESCUTCHEON
11 F3279804 POTENTIOMETER 6 CLICKS RD901-40-125F-B54-06D 50KB
12 G2187547 VR PEDAL
13 G2357125 PEDAL PLATE
14 15029106 LED LD002VB
27
28
11,4
NO PART CODE PART NAME DESCRIPTION
15 G2047001 7SEG COVER
16 F5029408 LED A-601H
17 G247751301 VGA KEYTOP S WITHOUT LENS
18 F3129306 SWITCH SKQKAB
19 G1147002 REAR PANEL
20 13449155MF PHONE JACK (MONO) HTJ-064-12I
21 13449440 JACK HSJ0857-01-210
22 13449150MF PHONE JACK (STEREO) HTJ-064-12D
23 F3159111 SLIDE SW SK22F02
24 F3449717 JACK HEC2392-01-150
25 F2367103 CORD HOOK
26 G2217733 PEDAL LABEL (OD/DS)
27 G2217734 PEDAL LABEL (MOD)
28 G2217735 PEDAL LABEL (DELAY)
29 F3279782 POTENTIOMETER RK11K1140(10K SPECIAL B-CURVE)
5
Feb.2003
EXPLODED VIEW
fig.explo1
6
fig.explo2
ME-50
7
Feb.2003
EXPLODED VIEW PARTS LIST
[PARTS]
NO PART CODE PART NAME DESCRIPTION
1 G2027904 TOP COVER
2 G2187193 BOTTOM COVER
3 G1147002 REAR PANEL
4 G2047001 7SEG COVER
5 G2187547 VR PEDAL
6 G2187910 PEDAL HOLDER
7 G2147119 BOLT HOLDER
8 G2357125 PEDAL PLATE
9 G2357122 REAR CUSHION
10 G2357111 CUSHION R
11 G2147806 STAY
12 G2217733 PEDAL LABEL (OD/DS)
13 G2217734 PEDAL LABEL (MOD)
14 G2217735 PEDAL LABEL (DELAY)
15 G2227301 PEDAL ESCUTCHEON
16 G2187602 SWITCH PEDAL
17 G2177103 SUPPORT SPRING
18 G2357126 PEDAL FOOT H=7.6
19 G247751001 VGA KEYTOP S BLACK WITH LENS
20 G247751301 VGA KEYTOP S WITHOUT LENS
21 G2477122 R-KNOB
22 F2367103 CORD HOOK
23 G2357120 FOOT H=5
24 G2017617 BATTERY CASE
25 G2027602 BATTERY COVER
26 G2177304 BATTERY TERMINAL (+ -)
27 G2177305 BATTERY TERMINAL (+)
28 G2177306 BATTERY TERMINAL (-)
29 75E013P000 MAIN SHEET ASSY
30 F3467025 WIRING 2P
MAIN SHEET ASSY includes the following parts.
31 ******** EXP BOARD ASSY
[SCREWS]
NO PART CODE PART NAME DESCRIPTION
a H5039521 VR ACCESSORY NUT M7
b H5039520 M9 NUT
c H5039126 M9 WASHER
d H5039514 NUT M6 HSJ-0999-01-190
e H5039121 WASHER 9.5X6.5 HSJ-0999-01-210
f H5039510 NUT M9X12X2 FENI
g H5039112 WASHER M9
h H5029331 SCREW 3X8 BINDING S-TIGHT FEBC
k H5029332 SCREW 3X6 BINDING S-TIGHT FEBZC
m H5029308 SCREW 3X10 BINDING S-TIGHT FEBC
n H5029330 SCREW M3X8 BINDING TAPTITE P BZC
o H5019124 SCREW M3X6 PAN MACHINE W/SW+SMALL PW ZC
p H5019130 SCREW M3X6 PAN MACHINE W/SW+PW ZC
q H5029867 HEX BOLT M6X70 HALF THEREAD BZ
r H5039122 PLAIN WASHER 6X13X1 BZC
s H5039515 NUT M6 U BZC
t H5019154 SPRING WASHER 6X12X1
u H5039111 PLAIN WASHER 3X8 ZC
8
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