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Yamaha Disklavier MX-100B Service Manual

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PP
008556
MX-100B
CONTENTS
Overall Circuit Diagram
YAMAHA CORP.
HAMAMATSU, JAPAN
Printed in Japan '90.8
1 3K-625
2
2
3
4
5
6
10
11
13
18
20
21

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Summary of Contents for Yamaha Disklavier MX-100B

  • Page 1: Table Of Contents

    How to Format Disks MIDI Block Diagram MIDI Data Format MIDI Implementation Chart Test Program Adjusting the Various Units Unit Wiring Block Diagram Circuit Boards Parts List Overall Circuit Diagram YAMAHA CORP. 008556 HAMAMATSU, JAPAN Printed in Japan '90.8 1 3K-625...
  • Page 2 MX-100B IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.

  • Page 3: Disklavier Design

    MX-100B The Disklavier Design Specifications Design Control unit • Key switches • LCD Dot matrix (16 characters x 2 lines) • LED indicators Power, Record, Volume, Tempo, Transposition, Metronome, MIDI. • LED display 7 segments x 2 digits • Disk drive 3.5 inch micro-floppy disk drive •...

  • Page 4: Panel Layout

    MX-100B Panel Layout • Front Panel • External MIDI Panel • Remote Control Unit...

  • Page 5: How To Format Disks

    MX-100B How to Format Disks After inserting a disk, press the Rec. button while keeping the Stop button depressed. You can release these buttons when the display reads "FORMAT OK?". In answer to the above message, press the Play/Pause button. (If you should decide not to proceed with formatting, remove the disk instead.) Reconfirm the above question by again pressing the Play/Pause button.

  • Page 6: Midi Block Diagram

    MX-100B MIDI Block Diagram...

  • Page 7: Midi Data Format

    MX-100B MIDI Data Format 1. Transmission Conditions...
  • Page 8 MX-100B 2. Transmission Data • CHANNEL INFORMATION 1) CHANNEL VOICE MESSAGES Key On/Off Status 1 0 0 1 n n n n (9n) n = channel number (0 ~ 15) Note No. 0 k k k k k k k k = 21(A- ) ~ 108 (C ): Note 1...
  • Page 9 MX-100B * The system realtime messages Timing Clock, Start, Continue, and Stop can be transmitted only when the metronome function is ON. * When playing back a disk recorded on another system (E-seq), all system information as well as system exclusive messages can be transmitted. * In MIDI OUT = DELAY OUT conditions, and also in Stop or Recording mode, delay the data received through MIDI IN by 500msec, and merge it with MIDI OUT without any changes.
  • Page 10 MX-100B 4. Reception Data • CHANNEL INFORMATION 1) CHANNEL VOICE MESSAGES Key Off Status 1 0 0 0 n n n n (8n) n = channel number (0 ~ 15) 0 k k k k k k k k = 21 (A- ) ~ 108(C Note No.

  • Page 11: Midi Implementation Chart

    MIDI Implementation Chart MX-100B [ DISKLAVIER Date : 15/5, 1990 Model MX100B MIDI Implementation Chart Version : 2.30 Remarks Transmitted Recognized Function ... Basic Default 1 - 16 Channel Changed 1 - 16 Default Mode Messages Altered Note 21 - 108 21 - 108 Number : True voice 21 - 108...

  • Page 12: Test Program

    MX-100B Test program This tests the control functions and the playback and recording systems of the disklavier. Item Operation Display / contents of test Version no. Trimmer value Start the test program • Remove the disk • While pressing the L/R button, •...
  • Page 13 MX-100B Operation Item Display / contents of test press the 5. RAM test OK (normal) or NG (faulty) • Check whether RAM is OK or NG press the 6. ROM test OK (normal) or NG (faulty) • Check whether ROM is OK or NG press the 7.

  • Page 14: Adjusting The Various Units

    MX-100B Adjusting the Various Units 1. Adjusting the key drive unit 2. Adjusting the key stop rail 3. Adjusting the pedal drive unit 4. Adjusting the pedal cushion unit 5. Adjusting the hammer sensor unit 6. Adjusting the key sensor unit 7.
  • Page 15 MX-100B 2. Adjusting the key stop rail Height adjustment so that the gap between the top of the black keys and the key Adjust the mounting screws stop rail is 0 (visually). * If the screws are excessively tightened ... the key touch will become heavy. notes will not sound correctly * If the screws are insufficiently tightened ..
  • Page 16 MX-100B 4. Adjusting the pedal cushion unit Use the adjustment screw to adjust the clearance between the pedal and the bottom sill to 1.0 5. Adjusting the hammer sensor unit The hammer sensor position is adjusted accord- ing to the ON position of the M2 sensor. Press the hammer forward and use the spacer to make adjustments so that the M2 is ON when there is a 1.5+/-0.8 mm gap between the string and the tip...
  • Page 17 MX-100B 6. Adjusting the key sensor unit Key sensor unit Height adjustment screw Balance rail Front rail Key shutter Keyboard Key bed Adjust the height adjustment screws (four locations) so that the key sensor turns ON when a white key is pressed 4.5 +/-0.5 mm. •...
  • Page 18 MX-100B 8. Adjusting the mute unit [Tape tension adjustment] Adjust the tape holder to a position where the tape is not excessively loose or tight when the soft mode is off, and fasten it in place. [Adjusting the soft sensor] Adjusting the normal mode switch Adjust the screw to open the normal mode...

  • Page 19: Unit Wiring

    MX-100B Unit Wiring (US, Canadian, British, European, Australian Models)
  • Page 20 MX-100B Unit Wiring (West German Model)

  • Page 21: Block Diagram

    MX-100B Block Diagram...

  • Page 22: Circuit Boards

    MX-100B MX-100B Circuit Boards • CPU Board...
  • Page 23 MX-100B MX-100B • I/O Board (Except West German Model)
  • Page 24 MX-100B MX-100B • I/O Board (West German model)
  • Page 25 MX-100B MX-100B • MIDI Board • Mute Board • Sensor Board...
  • Page 26 MX-100B MX-100B • Hammer LED Drive Board • M1, K Detect Board • M2 Detect Board • Key LED Drive Board • Power Supply Board (US, Canadian Model)
  • Page 27 MX-100B MX-100B • Power Supply Board (British, West German, European, Australian Model) • Drive B Board (West German Model) • Drive C Board (West German Model)

  • Page 28: Parts List

    MX-100B MX-100B PARTS LIST Market U; US C; Canadian B; British E; European WG; West German A; Australian Electrical Parts 1. Control Unit 2. Key Stop Rail Unit 3. Key Drive Unit (Except West German Model) 3. Key Drive Unit (West German Model) 4.

  • Page 29: Electrical Parts

    MX-100B Electrical Parts Ref. Description Remarks Part No. Control Unit VJ580100 Circuit Board, CPU CPU →iT202500 XF750A00 RP65C02G iT520500 YM5205 PMAC XA591001 YM3802 XA457001 MB81464-12 RAM(64kX4bit) iG132700 HD6350 ACIA iG057300 MB8877 iG137800 FDC9216B Data Separater XA513002 M50760-463 RMCN Decoder iG067210 TC4511BP BCD to 7 Latch iG068100...
  • Page 30 MX-100B Ref. Description Remarks No. Part No. VJ107300 Buzzer PKB30SPC-2001 VB293400 G6A-274 Relay KA501760 Rotary Switch GE300670 Ferrite Bead BL02RN2-R62T4 LB604730 IC30-2806G4 IC Socket LB021030 Connector LP Type, Top LB021050 Connector LP Type, Top LB021070 Connector LP Type, Top LB021110 Connector LP Type, Top LB021140 Connector LP Type, Top...
  • Page 31 MX-100B Ref. Remarks No. Part No. Description U, C, E, B, A VH388600 Key Drive Unit VH590200 Key Drive Unit =60 BL ODD Key VG927100 Coil Ass'y (A) VG927200 Coil Ass'y ( B ) =35 WH EVEN Key =75 BL Key# 1,17,39 VG967300 Coil Ass'y (AL)
  • Page 32 MX-100B Ref. No. Part No. Description Remarks iG036100 NJM2901 VB434400 Photo Diode S2506-02 Ω VB433900 Resistor Array Ω HZ003190 Resistor Array 4.7K Ω HV753470 1/4W Frame Ploof Carbon Resistor 0 . 1 µ F/25V FZ005030 Semi-Conductive Cera. Cap. CB502590 Socket LB918090 Connector XH Type, Top LB918110...
  • Page 33 MX-100B Ref. No. Part No. Description Remarks VG181900 Photo Coupller PC900V LB932020 Connector VH Type, Top LB932030 Connector VH Type, Top LB932040 Connector VH Type, Top LB932050 Connector VH Type, Top LB932060 Connector VH Type, Top LB916020 Connector, Top LB916030 Connector, Top LB916040 Connector, Top...
  • Page 34 MX-100B Ref. No. Part No. Description Remarks iB059630 Transistor 2SB596 VH441500 MC1413P TR Array VA106500 Diode 1SS176 iF001840 Zener Diode RD-3.0EB VB434900 RD-2.2EB1 Zener Diode FZ006970 DSS310 0.022 EMI Filter VB293300 Ceramic Resonator CSA4.0MG11 VH867700 Capacitor Aray 220P X 8 B9HC0117-15N GE300670 BL02RN2-R62T4...
  • Page 35 MX-100B Ref. Description No. Part No. Remarks VD617900 Power Supply Unit U, C VH471100 Power Supply Unit B, E, A, WG iG083400 AN7812 12V Regurator IC2 iG136200 5V Regurator IC3,4 SI-3052V iC223840 Transistor 2SC2238B iC181520 Transistor 2SC1815 iH000390 Bridge Diode KBH2504 iX603810 Diode...

  • Page 36: Control Unit

    MX-100B 1. Control Unit...
  • Page 37 MX-100B 1 . Control Unit Ref. Part No. Description Remarks VJ652400 Front Panel VJ652500 Front Panel VJ652600 Front Panel VF156400 Spacer, Control Unit AA503110 Holder, Controller AA503080 Bottom Cover VB496400 Heat Sink CX558110 Sub Panel BL,WN CX558120 Sub Panel CX557810 Button, Switch START CX557820...
  • Page 38 MX-100B Ref. Part No. Description Remarks VB578600 Spacer, Heat Sink Bind Screw 3X5 BL ED330056 EB026056 2.6X5 YE Flat Head Screw VE514700 Remote Control Unit AA504370 Stopper, Upper Front Board...

  • Page 39: Key Stop Rail Unit

    MX-100B 2. Key Stop Rail Unit 2. Key Stop Rail Unit Ref. Part No. Description Remarks NB513830 Key Stop Rail Unit BL, WH Vi925900 Key Stop Rail Unit EA050256 5X25 YE Pan Head Screw AA504740 Spring EV200066 Flat Washer AA504056 Bolt AA504040 Shaft...

  • Page 40: Key Drive Unit (Except West German Model)

    MX-100B 3. Key Drive Unit (Except West German Model) 3. Key Drive Unit (Except West German Model) Ref. Part No. Description Remarks VH388600 Key Drive Unit VG927100 Coil Ass'y (A) =60 BL ODD Key VG927200 Coil Ass'y (B) =35 WH EVEN Key AX500620 Spring (C)

  • Page 41: Key Drive Unit (West German Model)

    MX-100B 3. Key Drive Unit (West German Model) Ref. Part No. Description Remarks VH590200 Key Drive Unit EA040556 Pan Head Screw 4X55 YE EX550110 Insert Nut B4X9.5 YE EB040186 Flat Head Screw 4X18 YE VG927000 Bushing, Spring VG925300 Cushion Spring (A) 18mm WH Rear VG925400...

  • Page 42: Key Sensor Unit

    MX-100B 4. Key Sensor Unit 4. Key Sensor Unit Ref. Part No. Description Remarks VF729400 Key Sensor Unit Except WG VJ579400 Key Sensor Unit CB502790 Sensor Head (B) AA503970 Spring (A) CB502800 Spacer (A) CB502650 Plug Emitter CB502700 Plug Receiver EA330046 Pan Head Screw 3X4 BL...

  • Page 43: Hammer Sensor Unit Air Damper Unit

    MX-100B 5. Hammer Sensor Unit Air Damper Unit...
  • Page 44 MX-100B 5. Hammer Sensor Unit, Air Damper Unit Ref. Part No. Description Remarks VJ579000 Hammer Sensor Unit Except WG VJ579100 Hammer Sensor Unit CB502790 Sensor Head (B) CB502700 Plug Receiver CB502600 Plug Emitter EA030036 3X3 YE Pan Head Screw EV200036 Flat Washer ED030046 3X4 YE...

  • Page 45: Pedal Drive Unit, Pedal Sensor Unit, Mute Motor Unit, Pedal Cushion Unit

    MX-100B 6. Pedal Drive Unit, Pedal Sensor Unit, Mute Moter Unit, Pedal Cushion Unit...
  • Page 46 MX-100B 6. Pedal Drive Unit, Pedal Sensor Unit, Mute Motor Unit, Pedal Cushion Unit Ref. Part No. Description Remarks VG392200 Pedal Drive Unit Except WG VH590400 Pedal Drive Unit AA504080 Pedal Lever Hook AA504590 Pedal Lever Clamp VF851400 Pedal Lever Spacer EV100046 Hexagonal Nut M4 YE...

  • Page 47: I/O Unit, Power Supply Unit, Midi Unit

    MX-100B 7. I/O Unit, Power Supply Unit, MIDI Unit...
  • Page 48 MX-100B 7. I/O Unit, Power Supply Unit, MIDI Unit Ref. Part No. Description Remarks VH065000 Circuit Board, I/O Except WG VJ580000 Circuit Board, I/O VE470400 Circuit Board, Sensor (A) VH065600 Circuit Board, Mute ED330066 Bind Head Screw 3X6 BL EK365020 4X6 YE BW Head Screw EX500116...

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