7. HitPADissues
1) CheckthatthePADstructureisinstalledcorrectly.
2) CheckwhethertheconnectionlineandsocketbetweenthePADandthemotherboardarenormal.
3) CheckwhetherthepowerandgroundarenormalonthePAD.
4) Checkwhetherr125/165isweldednormallyonthePAD.
5) CheckPADstrike
signal,otherwisethesensorisdamaged.
6) CheckwhethertheU27/33(4051)circuitisweldednormally.IfPIN3hasnooutput,replace4051.
8. Issuesrelatedtothepedal,slider,knob
1) PedalcircuitincludesCCPEDAL/SUSTAIN.Checkifthesocketsandrelatedcircuitisproperlysolderedor
damaged.
2) Sliderissues：
a) Checkwhethertheconnectionlineandsocketareconnectedproperly.
b) Checkwhetherthepowersupplyandgroundarenormalonthesmallplatewherethepushrod
is
located.
c) Check whether the push rod circuit is welded normally and whether the device is damaged by
virtualwelding.
d) Check whether the U5 (4051) circuit is welded normally and PIN3 cannot output signals, then
replacethe4051.
3) Knobissues：
a) Checkwhethertheconnectionlineand
socketareconnectedproperly.
b) Checkwhetherthepowersupplyandgroundarenormalonthepanelwheretheknobislocated.
c) Checkwhethertheknob circuitiswelded normallyandwhetherthedeviceisdamagedbyvirtual
welding.
d) Check whether the U46 (4051) circuit is welded normally and
PIN3 cannot output signals, then
replacethe4051.
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