E】Problems With Mechanical Noise; F】Problems With Muting The Acoustic Sound - Kawai AnyTime X GP Service Manual

【E】Problems with Mechanical Noise
● Noise.can.be.heard.before.the.hammer.reach.the.string.or.the.hammer.sticks.on.it.
Possible.Cause.1.:.. T he.shutter.and.sensor.positions.are.too.close.in.the.front-back.direction,.and.the.shutter.
touches.inside.the.sensor.cover..
Solution.1.: Loosen the screws of the sensor PWB frame or the sensor PWB assy, then
Possible.Cause.2.:.. T he. shutter. and. sensor. positions. are. too. close. vertically. and. the. shutter. touches. the.
bottom.of.the.sensor.cover..
Solution.1.: Referring to 〔3〕 【C】 "Adjusting the Sensor Height", adjust the height of sensor.
Possible.Cause.3.:.. T he. unit. width. is. too. long. vertically. and. the. pin. block. (wrest. plank). is. located. too. low,.
therefore.the.shutter.touches.the.lower.surface.of.the.pin.block..
Solution.1.: Plane the lower surface of the pin block.
● Mechanical.noise.can.be.heard.from.a.certain.key.while.keystroking.
Possible.Cause.1.:.. T he. gluing. between. the. shutter. and. hammer. shank. is. out. of. alignment.. Or. the. gluing.
dimension.is.too.small..Or.its.end.is.detached..
Solution.1.: Apply an additional layer of bonding agent (Cemedine Super X Clear) on it.
Possible.Cause.2.:.. T he.gluing.between.the.hammer.shank.and.hammer.is.out.of.alignment..
Solution.1.: Apply and additional layer of instant wood glue on it.
Possible.Cause.3.:.. T he.damper.stop.rail.locates.too.high.and.the.damper.lever.jumps.and.hits.the.sustaining.
(sostenuto).rod.when.the.key.is.stroked.strongly..
Solution.1.: Adjust the position of the damper stop rail to fasten firmly.
● Noise.can.be.heard.when.the.soft.pedal.is.released.
Possible.Cause.1.:.. T he.sensor.PWB.frame.is.touching.the."jaw".of.the.frame..
Solution.1.: Loosen the screws fastening the sensor PWB frame, then move the frame
【F】Problems with Muting the Acoustic Sound
● Sound.is.emitted.in.the.entire.or.certain.key.area.while.keystroked.strongly.
Possible.Cause.1.:.. T he.shank.stop.rail.is.too.close.to.the.string.(too.high)..
Solution.1.: Refer to 〔3〕 【B】 , and adjust the height of the shank stop rail.
Possible.Cause.2.:.. T he.hammer.shank.does.not.knock.the.shank.stop.rail.in.parallel..
Solution.1.: Refer to 〔3〕 【B】 , and adjust the height of the shank stop rail.
● . W hen.keystroked.strongly.on.the.bass.area.of.the.second.section,.a.slight.sound.can.be.
heard.despite.the.muting.mode.
Possible.Cause.1.:.. E ven.though.the.hammer.shank.is.blocked,.the.damper.rubs.the.string.when.it.goes.up..
This.emits.a.slight.sound..
Solution.1.: This is as designed.
adjust the sensor PWB frame.
towards the treble side.
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