Roland MT-90U Operating and maintenance manual
SERVICE NOTES
Issued by RJA
Copyright © 2008 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of Roland Cororation.
Printed in Japan (0285) (CC-KWS)17058572E0
Mar. 2008 MT-90U
Table of Contents
Cautionary Notes ..............................................................2
Main Specifications ...........................................................2
Location of Controls (Front Panel) .................................4
Location of Controls (Front Panel) Parts List................4
Location of Controls (Rear Panel)...................................5
Location of Controls (Rear Panel) Parts List .................5
Exploded View (All) .........................................................6
Exploded View (All) Parts List........................................7
Exploded View (1).............................................................8
Exploded View (1) Parts List...........................................9
Exploded View (2)...........................................................10
Exploded View (2) Parts List.........................................10
Important Notes on Assembly ......................................11
Block Diagram/Wiring Diagram..................................14
Parts List ...........................................................................16
Verifying the Version Number......................................18
Performing a Factory Reset............................................18
Updating the System ......................................................18
Test Mode .........................................................................18
Circuit Board (Main Board) ...........................................22
Circuit Diagram (Main Board: 1/4)..............................24
Circuit Diagram (Main Board: 2/4)..............................26
Circuit Diagram (Main Board: 3/4)..............................27
Circuit Diagram (Main Board: 4/4)..............................28
Circuit Board (Panel Board)...........................................30
Circuit Diagram (Panel Board)......................................32
Circuit Board (Jack, Volume, IR, USB, Power SW
Board)................................................................................34
Circuit Diagram (Jack Board: 1/3)................................36
Circuit Diagram (Jack Board: 2/3)................................38
Circuit Diagram (Jack Board: 3/3)................................40
Circuit Diagram (Volume Board)..................................42
Circuit Diagram (IR Board)............................................44
Circuit Diagram (USB Board)........................................44
Circuit Diagram (Power SW Board) .............................45
2
Mar. 2008 MT-90U
Cautionary Notes
Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
Back Up User Data!
Executing a Factory Reset returns the following settings to their factory
defaults. These cannot be backed up. Note them down on paper as required.
• Tuning settings (Owner’s Manual p. 17)
• Metronome tone (Owner’s Manual p. 47)
• Count sound settings (Owner’s Manual p. 48)
• Lyrics-display language setting (Owner’s Manual p. 49)
• Track Assign settings (Owner’s Manual p. 50)
• Setting the Type and Timing of CD to be Played Back
(Owner’s Manual p.51)
• USB memory settings (Owner’s Manual p. 52)
• USB driver settings (Owner’s Manual p. 52)
Part Replacement
When replacing components near the power-supply circuit or a heat-
generating circuit (such as a circuit provided with a heat sink or including a
cement resistor), carry out the procedure according to the instructions with
respect to the part number, direction, and attachment position (mounting so as
to leave an air gap between the component and the circuit board, etc.).
Parts List
A component whose part code is ******** cannot be supplied as a service part
because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and supplied as
a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
Circuit Diagram
In the circuit diagram, “NIU” is an abbreviation for “Not in Use,” and
“UnPop” is an abbreviation for “Unpopulated.” They both mean non-mounted
components. The circuit board and circuit board diagram show silk-screened
indications, but no components are mounted.
In the Main Board Circuit Diagram (p. 24), red parts on the PDF and gray parts
on paper media service notes mean non-mounted components. The circuit
board and circuit diagram show silk-screened indications, but no components
are mounted.
Main Specifications
MT-90U: Music Player
Playback Composer
External Memory
• USB Memory (sold separately)
• Floppy Disk
* Read only
* USB 3.5 in. floppy disk drive (FD-01 series) required (sold separately)
• CD-ROM
• Audio CD
* Read only
* Commercial USB CD drive required
Supported Data
• Standard MIDI Files (format 0/1)
• Roland Original Format
• Audio files (WAV; 44.1 kHz, 16 bit linear format)
• MP3 files (44.1 kHz, 32 to 320 kbps)
• Audio CD
* Commercial USB CD drive required
Tracks
16 tracks
Control
Reset, Stop, Play, Bwd, Fwd, Repeat, Marker, Song, Tempo, [+], [-], Track
Selection, Count In, Metronome (MIDI only), Center Cancel (audio only)
Tempo
Quarter note = 10 to 500 (MIDI only)
75 to 125% (audio only)
Resolution
120 ticks per quarter note (MIDI only)
Transpose
-6 to +5 (semitones)
Demo Songs
14 songs
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Mar. 2008 MT-90U
Sound Generator
Max. Polyphony
128 voices (MIDI only)
Tones
348 tones (including 8 drum sets, 1 effects set)
Internal Sounds
Conforms to GM2 system/GS format/XGlite supported
Master Tuning
415.3 Hz to 466.2 Hz (0.1 Hz units)
Effects
Reverb (MIDI only)
Chorus (MIDI only)
Sound Control: Sharp, Clear, Power
Sequencer
Metronome
Time Signatures: 2/2, 0/4, 2/4, 3/4, 4/4, 5/4, 6/4, 7/4, 3/8, 6/8, 9/8, 12/8
Volume: 11 levels
Pattern: 11 patterns
Other Functions
• Infrared Transmission
• Mic Echo
• Song List
• Floppy Disk Backup
Others
Display
Beat Indicator
122 x 32 dot, Graphic LCD (with backlight)
Language
Japanese (song title, lyrics), English
Lyric Display
Yes (LCD display)
Controls
• Volume
• Mic volume
• Mic echo
• Speaker switch
Rated Power Output
5 W
Speakers
10 cm x 1
Connectors
External memory connector: USB type A
USB connector: USB type B
Output jack (R/L): RCA pin type
Microphone jack (Mono): Standard type
Headphones jack: Stereo, mini type
MIDI In connector
Start/Stop jack
Power Supply
DC9V
Current Draw
2000 mA
Dimensions
165 (W) x 186 (D) x 270 (H) mm
6-1/2 (W) x 7-3/8 (D) x 10-11/16 (H) inches
Weight
2.5 Kg / 5 lbs 9 oz
Accessories
AC Adaptor (#04236101)
Power Code for 120 V (#02562456)
for 220 V CN (#5100000564)
for 230 V E (#5100000115)
for 230 V EU (#01903356)
for 240 V A (#03785590)
Remote Control (#04898434)
Lithium Battery (CR2025) (#********)
Owner’s Manual English (#04787745)
Options
USB Memory (M-UF1GB)
Floppy Disk Drive (FD-01 series)
Roland Microphone (DR-10/20)
Pedal Switch (DP-2)
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.
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Mar. 2008 MT-90U
Location of Controls (Front Panel)
fig.FrontPanel.eps
Location of Controls (Front Panel) Parts List
1
7
10
9
2
3
8
11 12
6
5
4
No. Part Code Part Name Description Q’ty
1 04787512 DISPLAY COVER 1
04780545 LCD 221-3065-0784 1
2 04892901 RADIAL LED (2COLOR RED/GREEN) L-3749ESGC 1
3 04787623 R-KNOB MF 1
05017756 14MM ROTARY VOLUME (STEREO) F14KH-1 B10K L15 FCX7 1
4 04787612 RUBBER SWITCH 1
5 04787567 LED LENS 4P 1
6 04787590 LED LENS 5P 1
04780456 LED (RED) L-314ED 4
7 04787589 LED LENS 1P 1
02015623 LED (GREEN) SLR-342MG3F 6
8 02341689 3.5MM JACK HTJ-035-28 1
9 04787490 BUTTON 1
05017823 POWER SWITCH PWL-2P1TL-6SASTC-001 1
10 04787645 FRONT PANEL 1
11 04787556 IRDA COVER 1
04673667 INFRARED TRANSCEIVER MODULE TFDU4101-TT3 1
03342178 IC GP1UM261RK0F 1
12 04560101 USB CONNECTOR A TYPE FEMALE UAR27-4K5J00 1
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Mar. 2008 MT-90U
Location of Controls (Rear Panel)
fig.RearPanel.eps
Location of Controls (Rear Panel) Parts List
2
1
3 4
87 9
6
5
10
No. Part Code Part Name Description Q’ty
1 02341634 DC JACK HTJ-020-05A (610-00100-04-00) 1
2, 8 00569278 6.5MM JACK LGR4609-7100F 2
3, 4 04890223 9MM VOLUME VX09211NPP20U1B20K 2
5 04890689 SLIDE SWITCH SKA-22D01N-G6-NA 1
6 05014890 PIN JACK 2L2P WR NI HSP-242V1P-01 1
7 03909767 DIN CONNECTOR HDC-052A-11 1
9 01459945 USB CONNECTOR YKF45-0002 1
10 40454856 SCREW M4X10 BINDING NI 1
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Mar. 2008 MT-90U
Exploded View (All)
fig.bunkaizu-all.eps
View3View4
View5
View1
View2
View9
View8
View6
View7
5
19
17
18 10
11
12
4
13
6
7
14
9
15
16
1
20
3
2
8
7
Mar. 2008 MT-90U
Exploded View (All) Parts List
No. Part Code Part Name Description Q’ty
1 04787601 REAR CASE 1
2 04787534 FRONT CASE 1
3 02342712 SPEAKER FULL-RANGE 1
4 04780545 LCD 221-3065-0784 1
5 04787634 SP GRILLE + NET 1
6 04787556 IRDA COVER 1
7 04898312 IR BOARD ASSY 1
8 04898334 VOLUME BOARD ASSY 1
9 04898367 SW BOARD ASSY 1
10 05122112 FRONT PANEL WITH LED LENS 1
11 04787612 RUBBER SWITCH 1
12 04898378 PANEL BOARD ASSY 1
13 04787501 CHASSIS 1
14 04898301 USB BOARD ASSY 1
15 04785823 MAIN BOARD ASSY 1
16 04898290 JACK BOARD ASSY 1
17 04787623 R-KNOB MF 1
18 04787490 BUTTON 1
19 04787512 DISPLAY COVER 1
20 01235378 FOOT 4
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Mar. 2008 MT-90U
Exploded View (1)
fig.bunkaizu-1.eps
b
a
f
a
f
f
c
f
e
View1 View2
View3 View4
View5 View6
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Mar. 2008 MT-90U
Exploded View (1) Parts List
View 1, 2
View 3, 4
View 5, 6
No. Part Code Part Name Description Q’ty
a 40011312 SCREW 3X8 BINDING TAPTITE P BZC 5
b 40012490 SCREW 4X10 BINDING TAPTITE P BZC 4
c 40011334 SCREW 3X12 BINDING TAPTITE-P FE BZC 1
e 40454856 SCREW M4X10 BINDING NI 1
f 03904456 SCREW 3X6 B-TITE BIND BZC 4
No. Part Code Part Name Description Q’ty
f 03904456 SCREW 3X6 B-TITE BIND BZC 8
No. Part Code Part Name Description Q’ty
a 40011312 SCREW 3X8 BINDING TAPTITE P BZC 6
f 03904456 SCREW 3X6 B-TITE BIND BZC 2
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Mar. 2008 MT-90U
Exploded View (2)
fig.bunkaizu-2.eps
Exploded View (2) Parts List
View 7, 8, 9
ab
a
d
a
a
View7 View8
View9
No. Part Code Part Name Description Q’ty
a 40011312 SCREW 3X8 BINDING TAPTITE P BZC 19
b 40012490 SCREW 4X10 BINDING TAPTITE P BZC 4
d 40012867 SCREW M3X8 PAN MACHINE W/SW+PW ZC 2
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