Roland MT-90U Service Manual

Mar. 2008 MT-90U

SERVICE NOTES

Issued by RJA

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

Printed in Japan (0285) (CC-KWS)17058572E0

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 heatgenerating 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.).

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

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.

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

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

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

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

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.

Mar. 2008 MT-90U

Location of Controls (Front Panel)

fig.FrontPanel.eps

Location of Controls (Front Panel) Parts List

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

Mar. 2008 MT-90U

Location of Controls (Rear Panel)

fig.RearPanel.eps

3 4

87 9

Location of Controls (Rear Panel) Parts List

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

Mar. 2008 MT-90U

Exploded View (All)

fig.bunkaizu-all.eps

View3View4

ew5

ew2

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

Mar. 2008 MT-90U

Exploded View (1)

fig.bunkaizu-1.eps

View1 View2

View3 View4

View5 View6

Mar. 2008 MT-90U

Exploded View (1) Parts List

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

Mar. 2008 MT-90U

Exploded View (2)

fig.bunkaizu-2.eps

View7 View8

Exploded View (2) Parts List

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

Mar. 2008 MT-90U

Not OKOK

Acetate tape

Front case

Important Notes on Assembly

To prevent damage to the wiring, cover edges using acetate tape.

fig.kumitate-1.eps

fig.kumitate-2.eps

To prevent screeching (unpleasant noise caused by vibration), apply acetate tape having a width of 10 mm to the front case.

fig.kumitate-3-e.eps

Apply 1 strip.

Apply 2 overlapping strips.

fig.kumitate-4-e.eps

Apply 1 strip.

Mar. 2008 MT-90U

Not OK

To prevent dust entry, apply cushion tape to the LCD unit. Do not peel off the backing paper.

fig.kumitate-5-e.eps

Do not peel off the backing paper.

To prevent light leakage by the LCD backlight from the speaker grille, apply acetate tape having a width of 12 mm.

fig.kumitate-6.eps

Secure the LCD wiring in place on the back of the front case using acetate tape.

fig.kumitate-8.eps

fig.kumitate-9-e.eps

fig.kumitate-7-e.eps

Secure the IrDA cover in place using double-sided adhesive tape having a width of 5 mm.

fig.kumitate-10.eps

fig.kumitate-11.eps

Not OK

Mar. 2008 MT-90U

Twist 3 turns.

3-pin

9-pin

Volume control

Double-sided adhesive tape

As a measure to prevent electromagnetic interference (EMI), attach Wiring J-2 to the Volume Board. Be careful to attach at the correct angle.

fig.kumitate-12.eps

fig.kumitate-13-e.eps

Twist the 9-pin wiring connecting the Jack Board and Volume Board 3 turns.

fig.kumitate-15-e.eps

Also secure the 9-pin wiring and 3-pin wiring using a sub-tie.

fig.kumitate-16.eps

Attachment angle not OK

Apply cushion tape for protecting the wiring to the Jack Board. Take care not to cover the screw hole.

fig.kumitate-14.eps

20mm

To keep the volume control from coming loose, apply double-sided adhesive tape having a width of 5 mm to the volume shaft.

fig.kumitate-17.eps

fig.kumitate-18-e.eps

Mar. 2008 MT-90U

Block Diagram/Wiring Diagram

fig.block.eps@L

Mar. 2008 MT-90U

fig.block.eps@R

W10

W11

No. Part Code Part Name Description Q’ty

W1 04894167 WIRING SW 2P L=120 UL1061 AWG22 VHR 1 W2 05012456 WIRING J-2 1 W3 04894145 WIRING 3P L=50 UL1061 AWG26 PHR-PHR 1 W4 05012067 WIRING J-1 1 W5 04894156 WIRING USB 5P L=130 UL20276 PHR-PHR 1 W6 04894134 WIRING 6P L=90 UL1061 AWG26 PHR-PHR 1 W7 04894201 WIRING FFC 20624FWRP1.00K1(0.05 x 0.7)20 1 W8 05011167 WIRING SHIELD 3P L=100 UL2791 AWG28 PHR-PHR 1 W9 04894178 WIRING SP 2P L=100 UL1061 AWG20 XHP 1 W10 04894189 WIRING FFC 20624FWRP1.00K1(0.05 x 0.7)16 1 W11 04894190 WIRING FFC 20624FWRP1.25K1(0.05 x 0.8)18 1

+ 33 hidden pages

Roland MT-90U Service Manual

Table of Contents

Cautionary Notes

Main Specifications

Location of Controls (Front Panel)

Location of Controls (Front Panel) Parts List

Location of Controls (Rear Panel)

Location of Controls (Rear Panel) Parts List

Exploded View (All)

Exploded View (All) Parts List

Exploded View (1)

Exploded View (1) Parts List

Exploded View (2)

Exploded View (2) Parts List

Important Notes on Assembly

Block Diagram/Wiring Diagram