Yamaha disklavier MX-100B User manual

MX-100B
CONTENTS
DisklavierDesign2
Specifications2
Panel Layout3
HowtoFormatDisks4
MIDIBlockDiagram5
MIDIDataFormat6
MIDIImplementationChart10
TestProgram11
AdjustingtheVariousUnits13
UnitWiring18
BlockDiagram20
CircuitBoards21
PartsList
OverallCircuitDiagram
PP
008556
YAMAHACORP.
HAMAMATSU,JAPAN
13K-625
PrintedinJapan'90.8

MX-100B
IMPORTANTNOTICE
ThismanualhasbeenprovidedfortheuseofauthorizedYamahaRetailersandtheirservicepersonnel.
Ithasbeenassumedthatbasicserviceproceduresinherenttotheindustry,andmorespecificallyYamaha
Products,arealreadyknownandunderstoodbytheusers,andhavethereforenotbeenrestated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product
mayresultinpersonalinjury,destructionofexpensivecomponentsandfailureofthe
producttoperformasspecified.Forthesereasons,weadviseallYamahaproductowners
thatallservicerequiredshouldbeperformedbyanauthorizedYamahaRetailerorthe
appointedservicerepresentative.
IMPORTANT: The presentation or sale of this manual toany individual or firm does not constitute
authorization,certification,recognitionofanyapplicabletechnicalcapabilities,or
establisha principle-agentrelationshipofanyform.
Thedataprovidedisbelievedtobeaccurateandapplicabletotheunit(s)indicatedonthecover.The
research,engineering,andservicedepartmentsofYamahaarecontinuallystrivingtoimproveYamaha
products.Modificationsare,therefore,inevitableandchangesinspecificationaresubjecttochangewithout
noticeorobligationtoretrofit.Shouldanydiscrepancyappeartoexist,pleasecontactthedistributor's
ServiceDivision.
WARNING:Staticdischargescandestroyexpensivecomponents.Dischargeanystaticelectricityyour
body may have accumulated by grounding yourself tothe ground buss inthe unit (heavy
gaugeblackwiresconnecttothisbuss).
IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before
youapplypowertotheunit.
1

MX-100B
TheDisklavierDesign
Specifications
Design
Controlunit• Keyswitches 18
•LCDDotmatrix(16charactersx 2 lines)
•LEDindicatorsPower,Record,Volume,Tempo,
Transposition,Metronome,MIDI.
•LEDdisplay7 segmentsx 2 digits
•Diskdrive 3.5inchmicro-floppydiskdrive
•JacksMIDIIN/OUT,footswitchphonejack
(ExcludingtheunitwithSpecificationsforWest
Germany)
•MediaDoublesided,doubledensity,doubletrack
3.5inchmicrofloppydisks
Memorycapacity:628kbytes
Numberofpieces:60
Musictitles:32characters
Disktitles:64characters
Solenoidunit• Polyphonicvoices16
Sensorunit• Polyphonicvoices16
Powersupply•PowerrequirementLocalACvoltage
•Ambienttemperature4°C(40°F)~ 40°C(104°F)
Standardequipment
•Wirelessremotecontrolunit
•Prerecordedfloppydisk
•Blankfloppydisk
*Specificationsandexteriordesignaresubjecttochangewithoutnotice.
2

MX-100B
PanelLayout
•FrontPanel
•ExternalMIDIPanel
•RemoteControlUnit
3

MX-100B
HowtoFormatDisks
Afterinsertinga disk,presstheRec.buttonwhilekeepingtheStopbuttondepressed.Youcan
releasethesebuttonswhenthedisplayreads"FORMATOK?".
Inanswertotheabovemessage,pressthePlay/Pausebutton.(Ifyoushoulddecidenotto
proceedwithformatting,removethediskinstead.)
ReconfirmtheabovequestionbyagainpressingthePlay/Pausebutton.(Ifyoudecidenotto
proceedwithformatting,removethediskinstead.)
Aftera fewminutes,formattingiscompletedandthedisplaywillchangeasfollows.
4

MX-100B
MIDIBlockDiagram
5

MX-100B
MIDIDataFormat
1.TransmissionConditions
6

MX-100B
2.TransmissionData
•CHANNELINFORMATION
1)CHANNELVOICEMESSAGES
•SYSTEMINFORMATION
1)SYSTEMREALTIMEMESSAGES
Timingclock
Status11111000(F8):Note2
Note2:Theclocktempocanbechangedwithina variablerangeof
=40~ 230.
Start
Status11111010(FA)
Continue
Status11111011(FB)
Stop
Status11111100(FC)
Activesensing
Status11111110(FE):Note3
Note3:Whenthepreferreddata,includingactivesensing,hasbeentransmitted,ifdata
isnottransmittedwithinanintervalofapproximately80milliseconds,themain
clockistransmitted.
7
KeyOn/Off
Status
NoteNo.
Velocity
10 0 1 n n n n (9n)
0kkkkkkk
0vvvvvvv
n=channelnumber(0~ 15)
k=21(A-1)~108(C7):Note1
v=0:keyoff
v=1~ 127: keyon
Note1:Transpositionisalsolimitedtothisrange.
ControlChange
Status
ControlNo.
Controlvalue
10 1 1 n n n n(Bn)
0ccccccc
0vvvvvvv
n=channelnumber(0~ 15)
ControlNo
c=7 volume(MIDIOUTVOL.)
c= 64Sustainpedal
c=67Softpedal
Controlvalue
v=0~ 127
v=0: off, 31:on
v=0: off, 31:on
ProgramChange
Status
ProgramNo.
11 0 0 n n n n (Cn)
0ppppppp
n=channelnumber(0~ 15)
p=0~ 127

MX-100B
*ThesystemrealtimemessagesTimingClock,Start,Continue,andStopcanbetransmitted
onlywhenthemetronomefunctionisON.
*Whenplayingbacka diskrecordedonanothersystem(E-seq),allsysteminformationas
wellassystemexclusivemessagescanbetransmitted.
*InMIDIOUT= DELAYOUTconditions,andalsoinStoporRecordingmode,delaythedata
receivedthroughMIDIINby500msec,andmergeitwithMIDIOUTwithoutanychanges.
3.ReceptionConditions
8

MX-100B
4.ReceptionData
•CHANNELINFORMATION
1)CHANNELVOICEMESSAGES
KeyOff
Status
NoteNo.
Velocity
KeyOn/Off
Status
NoteNo.
Velocity
•SYSTEMINFORMATION
1)SYSTEMREALTIMEMESSAGES
ActiveSensing
Status11111110(FE):Note4
Note4:Whenthiscodeisreceived,sensingbegins.Ifthereisneitherstatusnordata
foranintervalof300msec,thepianokeyboardandpedalsbecomeOFF,asdo
theNoteONofMIDIOUTandtheSustainPedalON.
9
ControlChange
Status
ControlNo.
ControlValue
10 0 0 n n n n (8n)
0kkkkkkk
0vvvvvvv
10 0 1 n n n n (9n)
0kkkkkkk
0vvvvvvv
n=channelnumber(0~ 15)
k=21(A-1)~108(C7)
v=ignored
n= channelnumber
k=21(A-1)~108(C7)
v=0:keyoff
v=1~ 127: keyon
10 1 1 n n n n (Bn)
0ccccccc
0vvvvvvv
n= channelnumber(0~15)
ControlNo.
c=64Sustainpedal
c= 67Softpedal
ControlValue
v=0: off, 31:on
v=0: off, 31:on

MX-100B
MIDIImplementationChart
[DISKLAVIER] Date: 15/5, 1990
ModelMX100BMIDIImplementationChartVersion: 2.30
10
Function...
BasicDefault
ChannelChanged
Default
ModeMessages
Altered
Note
Number: Truevoice
VelocityNoteON
NoteOFF
AfterKey's
TouchCh's
PitchBender
7
64
67
Control
Change
Prog
Change: True#
SystemExclusive
System: SongPos
:SongSel
Common: -Tune
System:Clock
RealTime: Commands
Aux:LocalON/OFF
:AllNotesOFF
Mes-:ActiveSense
sages:Reset
Transmitted
1
1- 16
3
21-108*1
o9nH,v=1-127
x9nH,v=0*1
x *1
x *1
o
o
o 0-127 *1
x*1
o
o
o
Recognized
1
1- 16
3
x
21- 108
21- 108
ov=1-127.
x
o
o
o
Remarks
ifMetronomeis
used
Notes:Allrecognizeddataaretransmitted500mseclater
ifcontrolermodeisSTOPorRECORDandDELAYOUTmodeison.
*1= Alldataareenabledtotransmittedasrecorddata
ifotherE_seqdiskisusedandDELAYOUTmodeison.
Mode1 : OMNION,POLYMode2 : OMNION,MONOo : Yes
Mode3 : OMNIOFF,POLYMode4 : OMNIOFF,MONOx : No

MX-100B
Testprogram
Thisteststhecontrolfunctionsandtheplaybackandrecordingsystemsofthedisklavier.
11
A
B
Item
Startthetestprogram
Contentsofeachtest
1.7 segmentLEDtest
2.LCDtest
3.Buzzertest
4.Switchtest
Operation
•Removethedisk
•Whilepressingthe
L/Rbutton,
•turnthepowerON.
pressthekey
pressthekey
pressthekey
pressthekey
tothenexttest
Display/ contentsoftest
Versionno.Trimmervalue
PianotypeControllertype
UPorGPRecorPly
uprightgrandrecordplayback
•Checkthatthepianotypeandcontrollertypematch( ,
)
•TheROMversionandtrimmervaluewillbedisplayed
(- )
*canbeswitchedusingtheDIPswitchontheCPU
board.
00, 11~99
•CheckthattheLEDlights(00,11~99),eachswitch
•ChecktheLCDThecheckeredpatternblinks
•Checkthemetronomebuzzer.Thebuzzersoundsin
synchronizationwiththeblinkingEXECUTING!!
01~40(8,9,18,20,and39omitted)
•Checktheswitchno.foreachbuttononthecontrolpanel
andremotecontrol,andthefootswitches.
Whenthebuttonsinthediagrambelowarepressed,
theLEDwilldisplaythecorrespondingnumber.
Toadvancetothenexttestpressthe
button.Toreturntotheprevioustestpress
button.
Switchno.
Footsw.no.= 40

MX-100B
12
B
Item
5.RAMtest
6.ROMtest
7.MIDItest
8.Pianotest
9.FDDtest
*executetheFDDtestonly
whennecessary
Operation
presstheKey
pressthekey
pressthekey
*connectMIDIIN/
OUTwitha cable
*removethecable
pressthekey
tothenexttest
pressthekey
*Inserta (formatted)
FD
(thetestwillstartin
5seconds)
Display/ contentsoftest
OK(normal)orNG(faulty)
•CheckwhetherRAMisOKorNG
OK(normal)orNG(faulty)
•CheckwhetherROMisOKorNG
OK(normal)orNG(faulty)
•CheckwhetherMIDIfunctionsareOKorNG
•Ifa MIDIcableisnotconnected,NGwillbedisplayed
01~88,90,91
•Playbacksystemtest:repeatplaybackintheorderof
keys1~88,D/Spedal
•Recordsystemtest:insynchronizationwiththeabove
playback,display
*Ifanerroroccurs,theLCDwilldisplaytheerrornumber
andtheLCDwillindicatethemeaning.
TrackNo.SideNo.SectorNo.
numberoftesttimes00~
•FDDwrite/read/verifytest
•LEDLCDdisplaycontentstest
•FDDtestisrepeatedcontinuouslyfortracks0~79
•IfanerroroccursitwillbedisplayedintheLCD

MX-100B
AdjustingtheVariousUnits
1.Adjustingthekeydriveunit
2.Adjustingthekeystoprail
3.Adjustingthepedaldriveunit
4.Adjustingthepedalcushionunit
5.Adjustingthehammersensorunit
6.Adjustingthekeysensorunit
7.Adjustingthepedalsensorunit
8.Adjustingthemuteunit
1.Adjustingthekeydriveunit
KeyDriveunit
Keyboard
Keybackrail
Keybed
Adjustmentscrews4 x 75
Spacer
Nut
Forward/backwardadjustment
Pushtheunitagainstthefrontsurfaceofthekeybackrail.
Left/rightadjustment
Installkeys2,50,and87,thenalignthekeydriveunitsothateachsolenoidisthecenterofthe
correspondingkey.
Heightadjustment
Installkeysexceptforthoselocatedattheadjustmentscrews
,andadjustthescrews
so
thatthegapattheuppersurfaceofthekeydriveunitis2 mm.
Proceduresmarkedwithareveryimportantprocessesforbringingoutthefullcapabilitiesof
thedisklavier.
13

MX-100B
2.Adjustingthekeystoprail
Heightadjustment
Adjustthemountingscrewssothatthegapbetweenthetopoftheblackkeysandthekey
stoprailis0 (visually).
*Ifthescrewsareexcessivelytightened...thekeytouchwillbecomeheavy.
noteswillnot
soundcorrectly
*Ifthescrewsareinsufficientlytightened..thekeyswillpopupduringplayback
3.Adjustingthepedaldriveunit
Pedalsolenoid
Wire
Pedalleverhook
Pedalleverclamp
Pedallevelrubber
Pedalrod
Pedalroddowel
HexnutM4
HexnutM4
Pedallever
Adjustthelengthofthewiresothatthegapat
is
5mm....forthesoftpedal
3mm....forthedamperpedal
Afteradjustingthenut
,tightenthenut
*Setthewiresothatitisverticalinboththefront/
backandleft/rightdirections.
Ifthewireisslanted,thesolenoidaxiswillbeoff
center,causingmechanicalnoise.
14

MX-100B
4.Adjustingthepedalcushionunit
Usetheadjustmentscrewtoadjusttheclearancebetweenthepedalandthebottomsillto1.0
mm.
Thehammersensorpositionisadjustedaccord-
ingtotheONpositionoftheM2sensor.Press
thehammerforwardandusethespacertomake
adjustmentssothattheM2isONwhenthereisa
1.5+/-0.8mmgapbetweenthestringandthetip
ofthehammer.
Procedure
(1)WhilepressingtheL/Rbuttons,turnthe
powerswitchONandthetestprogramwill
begin.
(2)Pressthe+ button8 timestomovetothe
PianoTest(keyboardplaybackwillbegin).
(3)PresstheSTOPbuttontostopplayback.
(4)Manuallypressthehammertomoveittoward
thestring.
(5)WhenM2turnson,thebuzzerwillsound.
Thisallowsyoutoadjustthesensorposition.
15
5.Adjustingthehammersensorunit

MX-100B
6.Adjustingthekeysensorunit
Keysensorunit
Heightadjustmentscrew
Balancerail
Frontrail
Keyshutter
Keyboard
Keybed
Adjusttheheightadjustmentscrews
(fourlocations)sothatthekeysensorturnsONwhena
whitekeyispressed4.5+/-0.5mm.
•IfONistoosoon(shallow)....tightenthescrew.
•IfONistoolate(deep)..........loosenthescrew.
Procedure(fromtheconditionofPianoTest)
(1)Pressa keynearbytheheightadjustmentscrew.
(2)Slowlyreleasethekey.
(3)Adjustthepositionatwhichthebuzzerstops(keyoff).
7.Adjustingthepedalsensorunit
Usetheadjustmentscrewtoraiseandlower
thesensorsothatitturnsONatthefollowing
positions.
•Damperpedal....whenthedamperfeltis1 mm
abovethestring(nearthe
49thkey).
•Softpedal..........when2—3mmabovethe
hammerrail
•ifONistoosoon........raisethesensor.
•ifONistoolate..........lowerthesensor.
Procedure
(1)Individuallydepressthedamperandsoft
pedals,andmakeadjustments.
(2)ThebuzzerwillsoundattheONposition.
Adjustthesensoraccordingly.
Pedalsensor
Sensorbracket
Adjustmentscrew
Bottomsill
Pedallever
Pedalleverhook
*IfthebuzzerdoesnotsoundevenwhenthetestprogramisinPianoTest(oldROMversion),
refertotheservicemanualandmakeadjustmentsusinga MIDIinstrumentora MIDIsensor
checker.
16

MX-100B
8.Adjustingthemuteunit
[Tapetensionadjustment]
Adjustthetapeholdertoa positionwherethe
tapeisnotexcessivelylooseortightwhenthe
softmodeisoff,andfastenitinplace.
[Adjustingthesoftsensor]
Adjustingthenormalmodeswitch
Adjustthescrew
toopenthenormalmode
switchinthenormalmode[VOL.0~ - 8].
17
Adjustingthesoftmodeswitch
Setthevolumetothesoftmode
[VOL. - 9 ~- 10 ]. And adjust the screw to
theopenthesoftmodeswitchwhenthe
hammerblowdistanceis1 7mm+/-3insoft
mode.

MX-100B
Unit Wiring (US, Canadian, British, European, Australian Models)
18

MX-100B
Unit Wiring (West German Model)
19