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MAINTENANCE HANDBOOK

GB1KS

MHB29

May, 2011

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Содержание Silent Piano GB1KS

Страница 1: ...MAINTENANCE HANDBOOK GB1KS MHB29 May 2011 ...

Страница 2: ...n see GPS GB1 Service manual PP008615 Table of Contents 1 Unit structure and Names 2 2 Adjustment Checking points 4 3 Piano regulation caution 5 4 Check regulation and Adjustment Silent mechanism 6 5 Silent let off Adjustment 9 6 Sensor Unit Adjustment 12 7 Maintenance and Test Modes 13 8 Unit Connection Diagram 16 9 Parts List 17 ...

Страница 3: ...operation lever and detects key and pedal movement Key Sensor Unit Key sensor unit adjustment P 12 Key sensor measurement P 13 Regulating Rod Check adjustment P 8 Silent let off adjustment P 9 11 Hammer Shank Stopper Check adjustment P 6 7 Switch Box Front side Power Switch Reverb Adjustment Knob Right side diagram Volume Knob Headphone Jacks Test Switch Back side Pedal Connector Key Connector DC ...

Страница 4: ...ensor ON OFF How to check adjust the sensor detection position P 14 Damper Pedal Sensor Variable Resister VR Sensor ON Half OFF Damper pedal sensor measurement P 14 How to check the sensor detection position P 14 Damper pedal sensor position adjustment P 15 Bottom face diagram Switch Box ...

Страница 5: ... 8 Silent let off adjustment Level adjustment of the regulating rod Escapes at the shank stopping position 1 to 2mm before shank stopping position P 9 Sensor unit adjustment Key sensor unit adjustment Gap between the bottom surface of black keys and the upper surface of key sensor unit when pressing the black keys to the lowest position 3 8 to 4 0mm P 12 Adjustment of pedal sensor unit P 12 15 Mai...

Страница 6: ...n for tuning and voiving operate the Silent lever to release the Silent mechanism Fig 5 and remove the key sensor connector in front of the action Fig 6 Fig 5 Fig 6 Hammer let off approx 2mm normally same distance as GP Hammer drop 2 point matching Fig 7 simultaneous contact of and Other regulation same as GP Fig 7 ...

Страница 7: ...nt In the Silent mode the sostenuto pedal is ineffective Hammer shank stopper check adjustment Pull the Silent lever to activate the Silent mechanism Adjust and set the hammer shank stopper cushion to contact the hammer shank vertically Visual confirmation is possible Fig 8 Set the hammer shank stopping position to 5 6mm from the strings Fig 11 Disengage the Silent lever and make sure that the ham...

Страница 8: ...r cushioning Thickness t Component No Remarks 5 5mm T6210100 Used in product 5 0mm T6210110 Same as above 4 5mm T6210120 Same as above 4 0mm T6210130 Same as above 3 5mm T6210140 Same as above 3 0mm T6210150 For adjustment 2 5mm T6210160 Same as above Cushion length are all 378mm Cut as follows Bass 365mm Middle 375mm Treble 232mm Shank stopping position 5 6mm from the string Thickness t Cushionin...

Страница 9: ... jack Adjustment of contact angle to regulating rod Angle position Regulating rod b and small jack s knob a respectively contact in the center position Fig 12 Adjustment spot Regulating rod drive lever adjustment screw installed in the back of the action treble side Fig 13 Rotation end position changes Fig 12 Fig 13 To rotate regulating rod more Adjust screw clockwise To rotate regulating rod less...

Страница 10: ...es at the shank stopping position 1 to 2mm 6 to 8mm from the string At this time jack A and a contact B and b almost simultaneously Adjustment spot Regulating rod adjustment screw Fig 16 Adjustment hint For 1 screw rotation Silent let off changes 3mm Adjustment method P 10 11 In Silent mode let off jack escapement drop cannot be seen To confirm Silent let off increase drop to 8 to 9mm Adjust Silen...

Страница 11: ...ulating rod position With the Silent mechanism ON check Silent mode let off at the both ends of each section Silent mode let off measurement 1 to 2mm from the hammer shank stopping position and normally 6 to 8mm from the string Disengage Silent mechanism and remove connector in front of the action and remove the connector in front of the action Then pull out the action and increase the hammer drop...

Страница 12: ...obs are contacting the regulating button and regulating rod almost simultaneously If this simultaneous contact is drastically different check the following parts Hammer shank stopping position P 7 Normal hammer let off measurement P 5 Silent mode let off measurement P 9 If the small jack s knob A and regulating button contact is earlier in the Silent mode there will be a negative effect with the t...

Страница 13: ...ets 4 Adjustment screws 2 each Adjust from the bottom of the keyboard with 2 adjustment screws to make a gap of appropriate size Make sure the gap between the keyboard and Key sensor rail is parallel Pedal sensor unit adjustment Damper pedal detection position adjustment shall be done in the maintenance mode by confirming the buzzer sounds See the maintenance mode P 13 14 Shift pedal sensor detect...

Страница 14: ...y to be measured The tone will change to the tone of the key to be measured 2 3 Rest value measurement Confirm that key is in the rest position Confirm that key is in the rest position 4 Rest value registration Depress the damper pedal Three successive tones will be sounded at regular 1 sec intervals Depress the damper pedal Three successive tones will be sounded at regular 1 sec intervals 5 End v...

Страница 15: ...heck status 4 1 A buzzer continuous tone is sounded 2 A buzzer intermittent tone is sounded 3 A buzzer quick intermittent tone is sounded 4 When the writing is finished the tone 76C will be sounded every second If the writing is not finished successfully the tone 78D and the tone 76C will be sounded alternately Test mode How to start up the test mode Turn on the power switch while pressing the low...

Страница 16: ...al at stroke end Quick intermittent tone 3 Set the buzzer to sound of 4 when the shift pedal moves the action to the right by 1mm Damper Shift pedal sensor adjustment spots Fig 19 SW Box Test Test start up termination Connect headphones and turn on the power Push test switch SW on the backside of the switch box to start the test press SW again to terminate Fig 20 Damper Pedal Sensor Adjustment Scr...

Страница 17: ...hord sound AD test Detects reverb knob rotation and damper pedal depth and then produces a chromatic scale During the test Rotating the reverb knob clockwise produces a chromatic scale from low to high counter clockwise rotation produces a chromatic scale from high to low Pressing the damper pedal produces a chromatic scale from low to high releasing the pedal produces the scale from high to low C...

Страница 18: ...87500 6 ROTARY VARUABLE RESISTOR HS41252R FOR DAMPER PEDAL SENSOR 7 PEDAL UNIT SG WR310300 SHIFT PEDAL SENSOR UNIT 8 SG CONNECTOR ASSEMBLY WR687400 9 LEAF SWITCH WM242100 FOR SHIFTPEDAL SENSOR 10 SWITCH BOX UNIT WS184500 11 DM CIRCUIT BOARD WS184600 12 AM CIRCUIT BOARD WH126000 13 DC IN CIRCUIT BOARD WH126100 14 HEADPHONES VQ78520 HPE 170 15 AC ADAPTOR WK014700 PA 150U 16 HEADPHONE HANGER WH125500...

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