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Roland MT-90U Service Notes

Roland MT-90U Service Notes

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Download this manual See also: Handbook, Owner's Manual
Mar. 2008

Table of Contents

Cautionary Notes ..............................................................2
Main Specifications ...........................................................2
Location of Controls (Front Panel) .................................4
Location of Controls (Rear Panel)...................................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
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.
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
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
17058572E0
SERVICE NOTES
Issued by RJA
Printed in Japan (0285) (CC-KWS)
MT-90U

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Summary of Contents for Roland MT-90U

  • Page 1: Table Of Contents

    Performing a Factory Reset..........18 Circuit Diagram (Power SW Board) ......45 Updating the System ............18 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.

  • Page 2: Cautionary Notes

    Cautionary Notes Main Specifications Before beginning the procedure, please read through this document. The matters described may MT-90U: Music Player differ according to the model. Playback Composer Back Up User Data! Executing a Factory Reset returns the following settings to their factory External Memory defaults.

  • Page 3: Power Supply

    Display Options Beat Indicator USB Memory (M-UF1GB) 122 x 32 dot, Graphic LCD (with backlight) Floppy Disk Drive (FD-01 series) Roland Microphone (DR-10/20) Language Pedal Switch (DP-2) Japanese (song title, lyrics), English Lyric Display Yes (LCD display) * In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.

  • Page 4: Location Of Controls (Front Panel)

    Mar. 2008 MT-90U Location of Controls (Front Panel) fig.FrontPanel.eps Location of Controls (Front Panel) Parts List Part Code Part Name Description Q’ty 04787512 DISPLAY COVER 04780545 221-3065-0784 04892901 RADIAL LED (2COLOR RED/GREEN) L-3749ESGC 04787623 R-KNOB MF 05017756 14MM ROTARY VOLUME (STEREO)

  • Page 5: Location Of Controls (Rear Panel)

    Mar. 2008 MT-90U Location of Controls (Rear Panel) fig.RearPanel.eps Location of Controls (Rear Panel) Parts List Part Code Part Name Description Q’ty 02341634 DC JACK HTJ-020-05A (610-00100-04-00) 2, 8 00569278 6.5MM JACK LGR4609-7100F 3, 4 04890223 9MM VOLUME VX09211NPP20U1B20K 04890689...

  • Page 6: Exploded View (All)

    Mar. 2008 MT-90U Exploded View (All) fig.bunkaizu-all.eps...

  • Page 7: Exploded View (All) Parts List

    Mar. 2008 MT-90U Exploded View (All) Parts List Part Code Part Name Description Q’ty 04787601 REAR CASE 04787534 FRONT CASE 02342712 SPEAKER FULL-RANGE 04780545 221-3065-0784 04787634 SP GRILLE + NET 04787556 IRDA COVER 04898312 IR BOARD ASSY 04898334 VOLUME BOARD ASSY...

  • Page 8: Exploded View (1)

    Mar. 2008 MT-90U Exploded View (1) fig.bunkaizu-1.eps View1 View2 View3 View4 View5 View6...

  • Page 9: Exploded View (1) Parts List

    Mar. 2008 MT-90U Exploded View (1) Parts List View 1, 2 Part Code Part Name Description Q’ty 40011312 SCREW 3X8 BINDING TAPTITE P BZC 40012490 SCREW 4X10 BINDING TAPTITE P BZC 40011334 SCREW 3X12 BINDING TAPTITE-P FE BZC 40454856 SCREW M4X10...

  • Page 10: Exploded View (2)

    Mar. 2008 MT-90U Exploded View (2) fig.bunkaizu-2.eps View7 View8 View9 Exploded View (2) Parts List View 7, 8, 9 Part Code Part Name Description Q’ty 40011312 SCREW 3X8 BINDING TAPTITE P BZC 40012490 SCREW 4X10 BINDING TAPTITE P BZC 40012867...

  • Page 11: Important Notes On Assembly

    Mar. 2008 MT-90U Important Notes on Assembly To prevent damage to the wiring, cover edges using acetate tape. To prevent screeching (unpleasant noise caused by vibration), apply acetate fig.kumitate-1.eps tape having a width of 10 mm to the front case.
  • Page 12 Mar. 2008 MT-90U To prevent dust entry, apply cushion tape to the LCD unit. Do not peel off the Secure the LCD wiring in place on the back of the front case using acetate tape. backing paper. fig.kumitate-8.eps fig.kumitate-5-e.eps Do not peel off the backing paper.
  • Page 13 Mar. 2008 MT-90U As a measure to prevent electromagnetic interference (EMI), attach Wiring J-2 Twist the 9-pin wiring connecting the Jack Board and Volume Board 3 turns. to the Volume Board. Be careful to attach at the correct angle. fig.kumitate-15-e.eps fig.kumitate-12.eps...

  • Page 14: Block Diagram/Wiring Diagram

    Mar. 2008 MT-90U Block Diagram/Wiring Diagram fig.block.eps@L...
  • Page 15 Mar. 2008 MT-90U fig.block.eps@R Part Code Part Name Description Q’ty 04894167 WIRING SW 2P L=120 UL1061 AWG22 VHR 05012456 WIRING J-2 04894145 WIRING 3P L=50 UL1061 AWG26 PHR-PHR 05012067 WIRING J-1 04894156 WIRING USB 5P L=130 UL20276 PHR-PHR 04894134 WIRING...

  • Page 16: Parts List

    Mar. 2008 MT-90U Parts List fig.-part1-e.eps Due to one or more of the following reasons, SAFETY PRECAUTIONS: parts with parts code ******** cannot be supplied as service parts. The parts marked have safety-related characteristics. Use only listed parts for replacement.
  • Page 17 Mar. 2008 MT-90U POTENTIOMETER 04890223 9MM VOLUME VX09211NPP20U1B20K VR1, VR2 on Jack Board 05017756 14MM ROTARY VOLUME F14KH-1 B10K L15 FCX7 VR301 on Volume Board (STEREO) WIRING, CABLE 04894134 WIRING 6P L=90 UL1061 AWG26 PHR- 04894145 WIRING 3P L=50 UL1061 AWG26 PHR-...

  • Page 18: Verifying The Version Number

    Unarchive the update file, then copy all files and folders to the root folder 12. Mic Test (p. 20) on a USB memory device. 13. Phase Test (p. 20) Load the USB memory device in the MT-90U. 14. Echo Test (p. 20) Hold down the [ ] and [ ] buttons and switch on the power.
  • Page 19 Mar. 2008 MT-90U 1. Version 5. Switch Test Verify the version of the system. This tests switch operation. Hold down the [R] and [ ] buttons and switch on the power. Press the [ ], [ ], [-], and [+] buttons on the front panel in The Test mode is enabled.

  • Page 20: Factory Reset

    Press the [ ] button to advance to the next item. Connect the MIDI keyboard to MIDI IN on the rear panel, play the keyboard, and verify that the MT-90U produces sound. 15. Factory Reset Press the [ ] button to advance to the next item.
  • Page 21 Mar. 2008 MT-90U Speaker Test Adjust Volume to maximum and switch on the power. Verify that the built-in speaker does not produce a large amount of noise when the power is switched on. Press [ ] to play the built-in demo song, and verify that the music playback from the built-in speaker is free of distortion.

  • Page 22: Circuit Board (Main Board)

    Mar. 2008 MT-90U Circuit Board (Main Board) fig.b-main-1.eps...
  • Page 23 Mar. 2008 MT-90U fig.b-main-2.eps...

  • Page 24: Circuit Diagram (Main Board: 1/4)

    Mar. 2008 MT-90U Circuit Diagram (Main Board: 1/4) fig.d-main-1.eps@L...
  • Page 25 Mar. 2008 MT-90U fig.d-main-1.eps@R * No components are mounted on gray parts (or red parts on PDF).

  • Page 26: Circuit Diagram (Main Board: 2/4)

    Mar. 2008 MT-90U Circuit Diagram (Main Board: 2/4) fig.d-main-2.eps * No components are mounted on gray parts (or red parts on PDF).

  • Page 27: Circuit Diagram (Main Board: 3/4)

    Mar. 2008 MT-90U Circuit Diagram (Main Board: 3/4) fig.d-main-3.eps * No components are mounted on gray parts (or red parts on PDF).

  • Page 28: Circuit Diagram (Main Board: 4/4)

    Mar. 2008 MT-90U Circuit Diagram (Main Board: 4/4) fig.d-main-4.eps * No components are mounted on gray parts (or red parts on PDF).
  • Page 29 Mar. 2008 MT-90U...

  • Page 30: Circuit Board (Panel Board)

    Mar. 2008 MT-90U Circuit Board (Panel Board) fig.b-panel-1.eps...
  • Page 31 Mar. 2008 MT-90U fig.b-panel-2.eps...

  • Page 32: Circuit Diagram (Panel Board)

    Mar. 2008 MT-90U Circuit Diagram (Panel Board) fig.d-panel.eps@L...
  • Page 33 Mar. 2008 MT-90U fig.d-panel.eps@R...

  • Page 34: Circuit Board (Jack, Volume, Ir, Usb, Power Sw Board)

    Mar. 2008 MT-90U Circuit Board (Jack, Volume, IR, USB, Power SW Board) fig.b-jack-1.eps...
  • Page 35 Mar. 2008 MT-90U fig.b-jack-2.eps...

  • Page 36: Circuit Diagram (Jack Board: 1/3)

    Mar. 2008 MT-90U Circuit Diagram (Jack Board: 1/3) fig.d-jack-1.eps@L...
  • Page 37 Mar. 2008 MT-90U fig.d-jack-1.eps@R...

  • Page 38: Circuit Diagram (Jack Board: 2/3)

    Mar. 2008 MT-90U Circuit Diagram (Jack Board: 2/3) fig.d-jack-2.eps@L...
  • Page 39 Mar. 2008 MT-90U fig.d-jack-2.eps@R...

  • Page 40: Circuit Diagram (Jack Board: 3/3)

    Mar. 2008 MT-90U Circuit Diagram (Jack Board: 3/3) fig.d-jack-3.eps@L...
  • Page 41 Mar. 2008 MT-90U fig.d-jack-3.eps@R...

  • Page 42: Circuit Diagram (Volume Board)

    Mar. 2008 MT-90U Circuit Diagram (Volume Board) fig.d-volume.eps@L...
  • Page 43 Mar. 2008 MT-90U fig.d-volume.eps@R...

  • Page 44: Circuit Diagram (Ir Board)

    Mar. 2008 MT-90U Circuit Diagram (IR Board) fig.d-ir.eps Circuit Diagram (USB Board) fig.d-usb.eps...

  • Page 45: Circuit Diagram (Power Sw Board)

    Mar. 2008 MT-90U Circuit Diagram (Power SW Board) fig.d-pw-sw.eps...
  • Page 46 Mar. 2008 MT-90U...
  • Page 47 Mar. 2008 MT-90U...
  • Page 48 Mar. 2008 MT-90U MEMO...

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