Yamaha AvantGard N3 Maintenance Handbook

Yamaha AvantGard N3 Maintenance Handbook

Hybrid piano

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HYBRID PIANO
N3, N2, N1
NU1
MAINTENANCE HANDBOOK
MHB31
September 2012 Ver.1

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Table of Contents
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Summary of Contents for Yamaha AvantGard N3

  • Page 1 HYBRID PIANO N3, N2, N1 MAINTENANCE HANDBOOK MHB31 September 2012 Ver.1...
  • Page 2: Table Of Contents

    INTRODUCTION This booklet is the service technician manual for the AvantGrand N3, N2, N1 and NU1. It contains technical service information needed for providing product after-service mainly by piano service personnel. Please also refer to the service manual if there any areas not covered by the service information in this manual.
  • Page 3: Service Check Points

    N3, N2, N1, NU1 SERVICE CHECK POINTS CATEGORY CHECKPOINT MODELS During During reassembly after servicing, check that wiring bundle connectors for all electrical N3, N2, N1, assembly circuits are securely connected inside. During Be careful not to damage the key shutter when removing the keys. Scratch marks on the N3, N2, N1, assembly- shutter might cause faulty operation.
  • Page 4 N3, N2, N1, NU1 CATEGORY CHECKPOINT MODELS During Check and set the DIP switches on the board when replacing the DM circuit board, and N3, N2, N1, assembly always execute the factory set of the test program. During Never remove the NU1 side boards and arms. disassembly Side board R Side board L...
  • Page 5: Piano Action Adjustment Points & Standard Dimensions

    N3, N2, N1, NU1 PIANO ACTION ADJUSTMENT POINTS & STANDARD DIMENSIONS The N3, N2, N1, and NU1 have the same piano action as an acoustic piano but utilize shank stoppers instead of strings. The shank stoppers are positioned so that the timing that the hammer shank contacts the stopper matches the timing that the hammer head would contact the string in an acoustic piano.
  • Page 6: Key Sensor Measurement & Sensor Height Adjustment

    N3, N2, N1, NU1 KEY SENSOR MEASUREMENT & SENSOR HEIGHT ADJUSTMENT The following cases require N3, N2, N1, and NU1 keyboard and action adjustment. When playing performance is not satisfactory due to lack of evenness of action/keyboards movement and control. When a problem was found in generation of electronic sounds and required to be checked along with other problems.
  • Page 7 N3, N2, N1, NU1 Key sensor unit adjustment (N3, N2) Gap between the lower edge of key and the upper Position check edge of key sensor unit chassis, when a black key is depressed to the bottom Reference dimensions Gap of 3.8 mm to 4.0mm (a) Adjust the back-and-forth adjustment screws Adjustment method (1 each) for the 4 bracket positions on the sensor...
  • Page 8 N3, N2, N1, NU1 Key sensor measurement (keyboard measurement or key sensor calibration) (N3, N2, N1, NU1) [Setup] 1) Check that the cables and power cords are connected 2) Turn off the power 3) Wear headphones 4) Startup the maintenance mode While in this state, check on the headphones that sound is emitted in “C chord”...
  • Page 9 N3, N2, N1, NU1 [1 key measurement mode] Task Description Operating guide tones Task Description Screen display Content (N3,N2,N1) (N3,N2,N1) (NU1) (NU1) 1 Refer to start-up methods Start measurement mode Chord; 2 taps Start measurement mode Displays "1Ky" Do not touch anything Let stand 30 seconds to Let stand 1 minute to Displays "1Ky"...
  • Page 10: N1 And Nu1 Key Shutter Installation Procedure

    N1, NU1 N1 AND NU1 KEY SHUTTER INSTALLATION PROCEDURE Installation with a staple gun (shown below) is needed only for keyboard replacement of N1. The gray scale shutter can individually be replaced, in the same way as N3 and N2, for the key shutter replacement. Be sure to perform related keyboard and action adjustments and key sensor measurement, in addition to shutter installation, when you repair or replace the keyboard.
  • Page 11: External Part Finishing List

    N3, N2, N1, NU1 EXTERIOR PART FINISHING LIST Surface fi nishing of main exterior parts is summarized by model in the tables below. Repair coatings can be applied to polyester coated parts needing refi nishing. Other part sections should simply be replaced. The parts fi...
  • Page 12: N3 Parts List

    N3, N2, N1, NU1 N3 PARTS LIST TOP BOARD ASSEMBLY MUSIC REST ASSEMBLY MUSIC SHELF ASSEMBLY FRONT BOARD ASSEMBLY KEY COVER ASSEMBLY LEG ASSEMBLY FRONT RAIL ASSEMBLY PEDAL UNIT DESCRIPTION PART NO. REMARKS TOP BOARD FRONT ASSEMBLY ZE082300 Replacement set (service parts kit) TOP BOARD FRONT replacement adjuster part set ZE082400 Replacement set (service parts kit) TOP STICK ASSEMBLY...
  • Page 13: N2 Parts List

    N3, N2, N1, NU1 N2 PARTS LIST FRONT BOARD ASSEMBLY MUSIC REST ASSEMBLY ARM UPPER ASSEMBLY KEY COVER ASSEMBLY ARM LOWER ASSEMBLY FRONT RAIL ASSEMBLY SIDE BOARD ASSEMBLY WO GRILL ASSEMBLY LEG ASSEMBLY CENTER BOARD ASSEMBLY PEDAL ASSEMBLY DESCRIPTION PART NO. REMARKS FRONT TOP RAIL ASSEMBLY WQ976700...
  • Page 14: N1 Parts List

    N3, N2, N1, NU1 N1 PARTS LIST MUSIC REST ASSEMBLY KEY BLOCK TOP BOARD ASSEMBLY FRONT BOARD ASSEMBLY FRONT RAIL ASSEMBLY KEY COVER ASSEMBLY LEG ASSEMBLY FRONT LEG ASSEMBLY REAR PEDAL ASSEMBLY REAR LEG ANGLE LOWER DESCRIPTION PART NO. REMARKS TOP BOARD ASSEMBLY WU186200 Including music sheet retainer...
  • Page 15: Nu1 Parts List

    N3, N2, N1, NU1 NU1 PARTS LIST TOP BOARD ASSEMBLY MUSIC REST ASSEMBLY UPPER BOARD ASSEMBLY KEY COVER ASSEMBLY KEY BLOCK LEG ASSEMBLY FRONT RAIL ASSEMBLY LOWER BOARD ASSEMBLY PEDAL ASSEMBLY FRONT LEG SUPPORT RAIL DESCRIPTION PART NO. REMARKS TOP BOARD ASSEMBLY WZ051900 UPPER BOARD ASSEMBLY WZ051300...
  • Page 16: N3 Disassembly Procedure

    N3 DISASSEMBLY PROCEDURE CENTER RAIL CAUTION: Make sure not to remove the center rail from the N3. It is impossible to reinstall it once it is removed. 1. Key Cover Open the keyboard lid (also called the fall board) the same as on an acoustic grand piano (GP), raise and remove.
  • Page 17 Rotate the music rest 90 degrees and remove it. * The following is another way for removing the music rest. Shift the stay assembly as shown in the fi gure below from the music rest guide to remove the music rest. Back Front side...
  • Page 18 6. Sheet Box When sheet box is set vertical: Loosen the 14 screws [78G], slide the sheet box to the left, and then stand it up 90 degrees over the center rail. * Secure the sheet box assembly with screws for safety after raising it vertically. SHEET BOX How to remove Sheet Box: 6-2-1 Remove the music shelf angles L/R.
  • Page 19 7. Key Block Remove the two left/right screws [81], and remove the key block. [81] [81] 8. Front Rail Remove the nine [82] screws, remove the two left/right screws [78], and remove the key slip. <Bottom view> <Top view> Right side [82] [82] [82]...
  • Page 20: N2 Disassembly Procedure

    N2 DISASSEMBLY PROCEDURE CAUTION: Make sure not to remove the center rail from the N2. CENTER RAIL It is impossible to reinstall it once it is removed. 1. Key Cover Open the key cover (also called the fall board) the same as on an acoustic grand piano (GP), raise and remove.
  • Page 21 Remove the top board (F). Remove the left/right screws [S091] (one each) and slide the top board (F) to the rear, lift and remove. TOP BOARD (F) [S09I] [S09I] [S09I] [S07] [S06E] 3. SP Box Remove the SP box connector. SP BOX Remove the connectors (3 locations each on left &...
  • Page 22 6. Front Rail Remove the nine key bed bottom screws [280] and the four key bed upper screws [290A], and remove the key slip. Key bed bottom [290A] [280] [280] [280] [280] 7. Key Stop Rail A key nonwoven fabric (black) is attached to the key stop rail so take care not to tear it during removal. * There are 10 setscrews on the center rail top panel above the nonwoven fabric (black).
  • Page 23 11. Bottom unit section (access to main circuit board) 11-1 Remove the Wo Grill (L, R). Remove the key bed bottom screws [S05A], [S05B] (two each). Pull out the outer side towards you while holding down the inner side of the Wo grill and remove the fastening tape, then remove the Wo grill.
  • Page 24: N1 Disassembly Procedure

    N1 DISASSEMBLY PROCEDURE FRONT BOARD BACK RAIL CAUTION: Make sure to never remove both the front board assembly and the back rail assembly from the N1 at the same time. 1. Top Board TOP BOARD Remove the four (4) screws marked [S25] and slide the top board unit forward.
  • Page 25 4. Key Block Remove the two left/right screws [S2EB], and remove the key block. <Top view> [S2EB] [S2EB] [S2EB] [S2EB] KEY BLOCK R KEY BLOCK L 5. Front Rail Remove the two left/right screws [S2ED] (2 each), and remove the key slip. * Tighten the screws in the numerical order of q and w in the fi...
  • Page 26 7. Key Stop Rail The key stop rail is integrated into one piece with the protective sheet. * See 3-1 for information about the procedure to remove the protective sheet. 8. Shank Stopper Remove a total of four screws on the left/right at the 2 locations in the photos and remove the shank stopper. SHANK STOPPER 9.
  • Page 27: Nu1 Disassembly Procedure

    NU1 DISASSEMBLY PROCEDURE SIDE BOARD CAUTION: Make sure to never remove SIDE BOARD ASSEMBLY L ASSEMBLY R the side board assembly (L, R) and the arm assembly (L, R) ARM ASSEMBLY R ARM ASSEMBLY L from the NU1. These parts should not be repaired by replacing with service parts.
  • Page 28 5. Key Stopper Rail Remove the left/right screws [S2NC] (one each) and the two hex nuts [28], and the two plastic washers [26], and remove the key stop rail. * Be careful not to lose any of the damper holder spacers when attaching or removing the key stop rail. * Adjust the height of the key stop rail assembly by increasing or decreasing the number of damper holder spacers.
  • Page 29 8. Lower-front speaker grille and lower board Remove the four screws [S2MA] below the key bed. [S2MA] [S2MA] Insert a hex wrench or similar tool into the gap between the lower- HEXAGONAL WRENCH KEYBED (B) front speaker grill and the key bed unit. Pull towards you to remove the fastening tape, and remove the lower-front speaker grill.
  • Page 30: N3, N2 Key Cover Assembly-Replacement Procedure

    N3, N2 N3, N2 KEY COVER ASSEMBLY-REPLACEMENT PROCEDURE 1. Required items for task Service person shall possess the skill needed to replace the key cover in a grand piano. 2. Required parts The task requires the usual tools, the key cover assembly (ZE082500), key cover adjuster part sets (ZE082600). The following parts are included in the key cover adjuster part sets (ZE082600).
  • Page 31 N3, N2 Shall be no looseness/play in key cover when closed --- If there is looseness/play then perform adjustment E. N2/3 Shipping criteria: Step (B) or (C) between upper edge of key cover while closed and upper edge of arm shall be 5+1/-4 mm N2/3 Shipping criteria: Approximate difference in step between upper edge of key cover while closed and upper edge of side shim |B–C| shall be within 2 mm...
  • Page 32 N3, N2 Music shelf spacer Music shelf spacer Music rest spacer Fig. 6 N2 Music shelf spacer and music rest spacer installation locations 3-5. Adjustment C Change the rotation hardware (encircled part in Fig. 7) on the left/right of unit to set a correct height (+1.0mm to 2.0mm), and obtain a gap between the key cover and keys.
  • Page 33: N3 Top Board (F) Assembly-Replacement Procedure

    N3 TOP BOARD (F) ASSEMBLY-REPLACEMENT PROCEDURE 1. Required items for task Service personnel shall possess the physical strength needed to replace the top board in a grand piano. To ensure safety, 2 or more persons shall perform this task. 2. Required parts The task requires the usual tools, the top board (F) assembly dedicated service part (ZE082300), and the top board (F) adjuster part set (ZE082400).
  • Page 34 4. Adjustment Procedure 4-1 Using buttons with an optimal shape, install the fall board rubber buttons A thru C at the top board (F) assembly dedicated service part (C) positions. • With the top board (F) closed, select the most suitable one so that there is no more than 1 millimeter deviation in the gap between the front beam and the rubber button (E).
  • Page 35: N1 Key Cover Replacement Procedure

    N1 KEY COVER REPLACEMENT PROCEDURE (1) Replace with key cover with new part (10) (10) Clearance Clearance (2) Attachment possible? between front board between front board and key cover within and key cover within specification? specification? (3) Attach after adjusting damper width (11) Remove parts (12) Adjust front board height...
  • Page 36 • Parts to prepare • Key cover set: WY612200 << Contents of set >> • Damper holder spacer: WU82040, WU89920 • Key cover: WU18480 • Rubber button: Z2681600, Z0061800, Z0062500 • Damper holder L: WY158800 • Damper holder R: WY158900 (1) Replace key cover with new part (3) Attach after adjusting damper width Replace the key cover unit with the one prepared for...
  • Page 37 6-2 Adjust the key cover height to the height standard given (5) Remove parts 5-1 Remove the top board. in (4) by changing the number of damper holder spacers below the damper holders as needed. (Fig. 3) 6-3 Tighten the two (2) screws holding the damper holder. 5-2 Remove the front board.
  • Page 38 <Side view> <Side view> KEY COVER BLACK KEY KEY COVER Fig. 4 Fig. 5 (8) Adjust damper holder front/rear position (12) Adjust front board height using spacers 8-1 Loosen the screw marked [S09] and the screw marked Adjust to the standard given in section (10) by inserting or [S16] holding the damper holder to the arm.
  • Page 39 <Top view> DAMPER DAMPER HOLDER HOLDER SPACER SPACER [S2E] [S2E] [S2E] PROTECT COVER FRONT BOARD CLEAT FRONT BOARD <Front view> RUBBER BUTTON RUBBER BUTTON Fig. 7 (16) Does the key cover open properly? ●Adjustment procedure by replacing damper holder Standard Make sure the keys and the reflections of the 1) Replace the damper holders with parts for exclusive service keys on the key cover run in a straight line.
  • Page 40 <Side view> <Side view> <Side view> KEY COVER KEY COVER BLACK KEY KEY COVER FELT (RED) Fig. 9 Fig. 10 Fig. 8 Standard 2 Make sure that with the key cover closed the 4) Drill a pilot hole in the inner surface of the arm matching difference in level between the front surface of the hole on the back side of the damper holder body.
  • Page 41: N1 Arm Lower Assembly Replacement Procedure

    N1 ARM LOWER ASSEMBLY REPLACEMENT PROCEDURE * The following instructions describe the replacement of the arm lower assembly L. Replacement of the arm lower assembly R is performed in the same way. Remove the top board unit. Remove the connector assembly from the arm lower assembly L.
  • Page 42 11) Determine the correct front/rear position of the damper 12) Drill a pilot hole in the inner surface of the arm matching holder and tighten the screw from the arm top surface. the hole in the damper holder. Pilot hole: φ 2.1 mm ± 0.1 mm, depth 20 mm Standard 1 Make sure that with the key cover opened the 13) Remove the damper holder and countersink the hole.
  • Page 43: N1 Arm Upper Assembly Replacement Procedure

    N1 ARM UPPER ASSEMBLY REPLACEMENT PROCEDURE * The following instructions describe the replacement of the arm upper assembly L. Replacement of the arm upper assembly R is performed in the same way. Remove the top board unit. Install the arm upper assembly L. At this time, make sure the distance between the front of the arm lower assembly Remove the key cover unit.
  • Page 44: Q&A

    N3, N2, N1, NU1 Q & A CATEGORY QUESTION REPLY MODEL HANDLING What is the function Pressing the function switch along with the piano keys allows N3, N2, N1, switch used for? selecting the tone, switching the reverb types, selecting and setting transposing of notes and chords.
  • Page 45 N3, N2, N1, NU1 CATEGORY QUESTION REPLY MODEL ADJUST Are adjustments Tuning is not required. However these models do use the N3, N2, N1, required such as the same wooden keys and action, and felt as acoustic pianos tuning needed on so adjustment (servicing) is required when the keyboard acoustic pianos? operation is stiff due to wear or due to environmental...

This manual is also suitable for:

Avantgard n2Avantgard n1Avantgard nu1

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