Yamaha TransAcoustic SHTA Series Manual

Upright Piano
Apr. 2014 Ver. 1.0
MAINTENANCE HANDBOOK
MHB33

･･･ Page
1 Unit Structure and Names ･･･ 4
2
Summary of TransAcousticTM Technology ･･･ 5
3 Delivery and Routine Adjustment Check ･･･ 6
4 Action Removal Caution ･･･ 7
5
Check Regulation and Adjustment Silent Mechanism
･･･ 7
6 Sensor Unit Adjustment ･･･ 7
7
Calibration Mode
･･･ 7
8
Test Mode
･･･ 7
9 Program Update ･･･ 7
10 PEQ Data Transfer of SWBOX Replacement ･･･ 8
11 TD ASSY Replacement Procedure ･･･ 10
12
TD Shaft Assy Replacement Procedure
･･･ 13
13 Error Code List of AMP Unit’s LED ･･･ 14
14 Unit Connection Diagram ･･･ 15
15 Q&A ･･･ 16
16 Parts List ･･･ 17
Table of Contents
Foreword
This handbook covers the maintenance for the Silent Piano™ 's TransAcousticTM SHTA series released in
April 2014.
This handbook mainly focuses on information required for maintenance and overview mechanism of
the TA mode - the newly added function from the "SH series". Please refer to the User's manual for the
information about operation, and please refer to the "SH series MAINTENANCE HANDBOOK" for the
information about common contents of the "SH series".

1. Unit Structure and Names
■Main Unit and Pedals
■Switch Box
[Front View]
[Bottom View]
1 POWER Button
2 PIANO Button
3 REC Button
4 STOP Button
5 PLAY/PAUSE Button
6 －/NO, ＋/YES Button
7 FUNC. Button
8 Function Indicator
9 Display
10 USB Terminal
11 PHONES Jacks (Stereo Mini)
12 VOLUME Control
13 DC IN 12V Connector
14 MIDI IN/MIDI OUT Connectors
15 AUX IN/AUX OUT Jacks (Stereo Mini)
1 Switch Box
2 Soft Pedal
3 Silent Pedal
4 Damper Pedal
5 AC IN Unit (Soundboard Side)
6 TD ASSY
7 Amp Unit
10 11 12
14 15
13
1 2 3 4 5 6 7 8 9
4
3
2
1
5
6
7
6
- 4 -

2. Summary of TransAcousticTM Technology
■Characteristics of TransAcousticTM Technology
・
・Since the sound comes directly from the soundboard, you do not need to connect the speakers.
・
・
■Maintenance of TD ASSY
・There is no need for maintenance and periodic adjustment.
・
[What is 'PEQ data']
[Location data to be stored]
Damper pedal half point position Switch box DM Sheet
Key sensor measurement Key sensor Key sensor sheet
Piano type (Touch curve selection) Switch box DM Sheet
PEQ Data Switch box DM Sheet
*Measurement by calibration mode or data trancefer is required when replacing each unit.
Data
Unit
Sheet
The newly developed TransAcousticTM Technology transmits digital sounds directly to the piano soundboard and
makes the piano sound as speakers itself.
Due to environmental change, the soundboard repeatedly expands and contracts, therefore the TD Shaft is
required to change the three-dimensional motion in accordance with the movement of the soundboard.
However, if replacement of parts are required, such as malfunction of the TD ASSY, please execute the work in
accordance with the "11.TD ASSY replacement procedure (Page 10)".
The TransAcoustic Piano is set in accordance with the individual differences of the pianos in the factory during
production. Adjustment is required when a part is replaced. Please refer to "10. PEQ data migration of SWBOX
replacement (Page 8)" for more information.
PEQ data = TA mode EQ Calibration data
The function of 'TransAcousticTM Technology' is to produce sound by driving the sound board using the trance-
actuator. So each piano has its unique characteristic of frequency. The PEQ data is used to adjust the
characteristic.
The data is saved in the SWBOX unit.
If the PEQ data is lost or other's PEQ data is mis-loaded, there is a possibility that you cannot play normally (ex.
there is uneven velocity sound between the keys).
Soundboard and device (TD ASSY) for vibrating the sound board have been attached with a connecting rod,
called "TD Shaft Assy". The TD ASSY vibrates the TD Shaft Assy, then the vibration is transmitted to the
soundboard.
Soundboard
TD ASSY
Anchor
TD shaft Assy
- 5 -

3. Delivery and Routine Adjustment Check
TD Assy handling caution
1) To adjust the acoustic piano
Refer to topics No.4 - 9 (page 7)
2) Setting the pitch of the TA mode.
Set the pitch of the TA mode to the same pitch of your acoustic piano.
Step
1
2
3
5
3) Setting the pitch curve of the TA mode
Step
1
2
3
UP
GP
CF
CF
5
Press the [+/YES] or [‐/NO] button to select "F3.2"
Hold the [FUNC] button until the pitch parameter setup display
starts to blink.
The current parameter for the selected item blinks on the display.
Please execute the TA mode settings as follows once you tune and make some initial adjustments to the SHTA piano
upon delivery or during regular tuning.
Operation
Display
Press the [FUNC] button few times until the display turns on.
Since the magnetic force of the TD ASSY is strong, avoid close contact with your magnetic storage devices and
mechanical watches.
In the necessary case, set the pitch curve setting to match the piano type. Normally, the default setting is for the
"CF". Please adjust the pitch curve of "UP" TA mode when you use the piano in "Layer Playing Mode".
Operation
Display
Press the [FUNC] button to exit the Setup.
4
Press the [+/YES] or [‐/NO] button to select the pitch of the TA
mode to the same pitch for your acoustic piano.
You can fine-tune the pitch of the keyboard to 0.2 Hz increments.
The value appears as a two-digit number and one decimal number
(e.g. “40.2” for 440.2 Hz).
Setting range
414.8 ～ 466.8 (Hz)
Default setting
440.0 (Hz)
Hold the [FUNC] button until the pitch curve parameter setup
display starts to blink.
The current parameter for the selected item blinks on the display.
Press the [FUNC] button to exit the Setup.
Press the [FUNC] button few times until the display turns on.
Press the [+/YES] or [‐/NO] button to select "F4.3"
4
Press the [+/YES] or [‐/NO] button to select the pitch curve of the
TA mode.
(There are three types pitch curve.)
Setting
range
Pitch curve of an upright piano
Pitch curve of a grand piano
Pitch curve of a concert grand
Default setting
- 6 -

4. Action Removal Caution
*
5. Check Regulation and Adjustment Silent Mechanism
6. Sensor Unit Adjustment
7. Calibration Mode
8. Test Mode
*
9. Program Update
When removing the lower front board, remove the retaining screw from the lower front board
spring and then remove the board.
Two new contents were included in the Test Mode. Please refer to the "10. PEQ Data Transfer of SWBOX
Replacement (page 8)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 20)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 6)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 7)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 10)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 12)".
Please refer to the "SH series MAINTENANCE HANDBOOK (Page 15)".
- 7 -

10. PEQ Data Transfer of SWBOX Replacement
[Start-up]
[Testing items]
Saving PEQ data from SWBOX to the USB drive
Loading PEQ data from the USB drive to SWBOX
[Test mode operation procedures]
1) Start-up the test mode.
2) Push the [+/YES] or [-/NO] button to select desired testing item.
3) Push the [PLAY] button to start-up the selected testing item.
4) Execute the selected testing item according to the procedure below.
5) Push the [PLAY] button to terminate the testing item and redo step 2.
6) Turn the power off or select "t49" to terminate the test mode.
Before the SWBOX is replaced, please transfer the PEQ data to the new SWBOX by saving the PEQ data to the
USB drive in test mode, then please return the PEQ data to the SWBOX after the replacement.
Please refer to the "2. Summary of TransAcousticTM Technology (Page 5)" for PEQ data.
Panel buttons
[REC] + [PLAY] + POWER ON
Mode
Method
Operation
Display
Test mode
Lod
Sav
In addition to the conventional test mode for PEQ data transfer, two modes have been added.
Test No.
Testing item
Execute the
selected testing
item
Completed test
[+/YES]
[PLAY]
[PLAY]
[+/YES]
[+/YES]
[-/NO]
[-/NO]
[PLAY]
…
[+/YES]
[-/NO]
[+/YES]
[-/NO]
[+/YES]
[-/NO]
Saving PEQ data from SWBOX to the
USB drive
Loading PEQ data from the USB
drive to SWBOX
PEQ data
OLD SWBOX
NEW SWBOX
- 8 -

[Saving PEQ data from SWBOX to the USB drive]
No.
①Start-up
②
⑤
[Loading PEQ data from the USB drive to SWBOX]
No.
①Start-up
②
⑤
*How to check whether there is a PEQ data of the switch box
Please execute step 3 of [Loading PEQ data from the USB drive to SWBOX].
If the "Lod" blinks on display, the PEQ data has not been saved to the SWBOX.
③
④
Insertion of the USB drive
Loading of the PEQ data
④
Status
Insertion of the USB drive
Saving the PEQ data
Finish
③
Finish
Push the [PLAY] button once to terminate the testing item.
*"InS" is displayed if the USB drive is not inserted into SWBOX,
therefore please insert the USB drive to the SWBOX.
Completed loading
"PAS" indicates on display when PEQ data loading is finished.
Status
Operation
Display
*"InS" is displayed if the USB drive is not inserted into SWBOX,
therefore please insert the USB drive to the SWBOX.
Press the [+/YES] [‐/NO] button to select "Lod"and push the [PLAY]
button to start up.
*"Lod" blinks on display if the PEQ data has not been saved to the
SWBOX.
Insert the USB drive that has the PEQ data in the USB port.
Operation
Display
Push the [PLAY] button once to terminate the testing item.
Completed saving
"PAS" indicates on display when PEQ data saving is finished.
Refer to "Start-up"
Insert the USB drive in the USB port.
Press the [+/YES] [‐/NO] button to select "SAv"and push the [PLAY]
button to start up.
*"SAv" blinks on display if the PEQ data has not been saved to the USB
drive.
Refer to "Start-up"
- 9 -

11. TD ASSY Replacement Procedure
Notice:
Turn off the power during the procedure.
Required tools:
Allen wrench (3mm)
Phillips screwdriver #2
Structure:
Procedures:
1) Removing the TD ASSY
1-1. Remove the white square connector.
1-2. Please cut the Cable tie of the TD ASSY's wire bundle.
Please replace the TD ASSY if malfunction occurs. The TD ASSY must be fixed in the correct position.
If there was a flaw in the process, there is a possibility that the TA mode will not work correctly, in this case
please follow the instructions below.
Since the magnetic force of the TD ASSY is strong, avoid close contact with your magnetic storage devices and
mechanical watches.
When disconnecting, press the upper side then pull
apart like the figure below.
Soundboard
TD ASSY
Anchor
TD shaft Assy
Bobbin
- 10 -

1-3. Loosen the TD Shaft screw (rotate screw counterclockwise) using the Allen wrench.
*Installation angle of Allen wrench.
1-4. Remove the six screws using the Philips driver, then remove the TD ASSY from the Bracket.
*When you place the TD ASSY on the floor, please do not put the bobbin facing down.
2) Setting the new TD ASSY
2-1. Before fixing the screws, make sure to insert the new TD ASSY to the boss of the bracket.
2-2. Set the new TD ASSY and fix the six screws.
*
*In case the TD shaft does not enter smoothly in the TD ASSY
Please re-align in a good position by rotating the screw hole in the figure below.
Once the center of the screw hole is aligned with the
center of the bobbin, the shaft will enter smoothly.
Due to the strong magnetic force of the TD ASSY, please support the screws and the driver
with your fingers while screwing.
Fixing
Bracket
- 11 -

2-3. Adjustment position of the Bobbin.
2-4. Tighten the TD Shaft screw (rotate screw clockwise) using the Allen wrench
* Caution when attaching the TD ASSY
Make sure the position of the bobbin doesn't change while fixing the TD Shaft.
2-5. Re-attach the white square connector.
2-6. Set a Cable tie to the wire bundle of the TD ASSY.
* Make sure there are no wires interfering to the Frame, the Soundboard, and the Lower front board.
3) TD ASSY Operation Check
Check the sound on the TA mode when silent mechanism is engaged.
*When you play the chords and scales in full volume, please make sure to check if noise will appear or not.
Please check the TD ASSY for "resistance" by moving the bobbin in a push-pull motion. If this
occurs, adjust the TD Shaft using the Allen wrench.
Check again by pulling the bobbin gently and then release, tighten the TD Shaft using the Allen
wrench once the bobbin has stopped in its natural position.
If noise will appear, please repeat "Procedures 2" in order to re-install the TD Assy and make sure to do
it properly.
Pull
Release
- 12 -

12. TD Shaft Assy Replacement Procedure
Procedures:
1) Removing the TD ASSY
Please refer to the "11. TD ASSY Replacement Procedure (page 10)"
2) Removing and Setting the TD Shaft Assy
2-1. Remove the 3 screws then remove the TD Shaft Assy.
*Because anchor is glued to the soundboard, the exchange is not possible.
2-2. Set the TD Shaft Assy and tighten the 3 screws.
*The positions of TD Shaft Assy of the left and the right one are different.
Please refer to the following photos of the positions and how to attach the TD Shaft Assy.
3) Setting the new TD ASSY
Please refer to the "11. TD ASSY Replacement Procedure (page 10)"
4) TD ASSY Operation Check
Check the sound on the TA mode when silent mechanism is engaged.
*When you play the chords and scales in full volume, please make sure to check if noise will appear or not.
If noise will appear, please repeat "Procedures 1" in order to re-install the TD Shaft Assy and make sure
to do it properly.
*If both TD Shaft Assys are positioned incorrectly when attached, the cusion will be out of the TD
Left side
Right side
Anchor
TD Shaft Assy
- 13 -

13. Error Code List of AMP Unit’s LED
Location of the AMP UNIT's LEDs
The LEDs which are installed in the AMP unit indicate the error code when the AMP unit detects an error.
If the LED is "Yellow", it indicates a "WARNING" of overheat or other minor problems of the TD unit.
If the LED is "Red", it indicates a "FAILURE" of the TD unit or thermistor breakdown.
If the LEDs indicate an error, refer to the following chart in order to see the meaning of the error code.
- 14 -

14. Unit Connection Diagram
DC-IN
Switch Box Unit
CN2
Key sensor unit
Soft
Pedal sensor
Damper
Pedal
sensor
CN5
Amplifier Unit
TD ASSY
R ch
TD ASSY
L ch
AC-IN
Unit
AC adaptor
- 15 -

15. Q&A
Classification Answer
Manual
The Layer Playing Mode is the combination of the
Acoustic Piano Sound and the TA Digital Piano
Sound.
The Dual Voice Mode is the combination of the TA
Digital Piano Sound and the TA Digital Sound.
Other
Please check the piano model and serial number,
then contact with YAMAHA service department.
Other
Possible.
However you must use the AC adapter (PJP-PS04)
of the silent SH GP series.
Other
Impossible.
Because the SWBOX of the SH series is
incompatible with the SHTA series one.
Question
What is the difference between the
"Layer Playing Mode" and the "Dual
Voice Mode"?
Would it be possible to replace the
SWBOX of the SH series with the
SWBOX of the SHTA series?
What do I do if we can't save the PEQ
data from the broken SWBOX to the
USB drive?
Is it a possible to boot up the SWBOX
stand alone?
- 16 -

16. Parts List
E model U model
SHUTTER ASSY 131EX V7978300
←UP
KEY SHUTTER GRAY SCALE UPS V797780R
←UP
KEYSHUTTER GRAYSCALE BLOCK V797790R
←
KEY SENSOR UNIT ZA576000
←
CIRCUIT BOARD ZA598200
←
SWITCH BOX UNIT ZJ445400
←
TA-DM CIRCUIT BOARD ZJ503200
←
SH-AM CIRCUIT BOARD ZA104000
SH-PNB CIRCUIT BOARD ZG893000
←
SH-MA CIRCUIT BOARD ZA103300
←
SH-UH CIRCUIT BOARD ZA103600
←
PEDAL SENSOR UNIT L VQ461901
←DAMPER PEDAL
PEDAL SENSOR UNIT SH WK149901
←SOFT PEDAL
AMP UNIT TA ZJ416700 ZJ416600
AC ADAPTER UNIT #PJP-PS04 UL -- ZK406100
AC ADAPTER UNIT #PJP-PS04 CE ZK406200 --
CIRCUIT BOARD ASSY ACDCM
ZK392400
←
CIRCUIT BOARD ASSY FUSTB ZK392500
←
CIRCUIT BOARD ASSY MAD ZK392600
←
CIRCUIT BOARD ASSY TA-ACDIS ZH133500
←
CIRCUIT BOARD ASSY TA-XDCR ZH133400
←
CIRCUIT BOARD ASSY TAUP-GMB ZJ490100
←
AC IN UNIT TA ZJ521900 ZJ426800
POWER CORD ASSY U C PJP-300V : -- WJ373600
POWER CORD ASSY G : PJP-300V : WJ373900 --
AC IN UNIT TA E ZJ521900 ZJ426800
WIRE HARNESS SWB-KP DF14P-DF10D,2,3,4P ZF164300
←SWITCH BOX to SENSOR UNITS
WIRE HARNESS DC PLUG CABLE SH ZE724100
←SWITCH BOX to DC-IN UNIT
HEADPHONE HANGER SH ZE189700
←
SCREW MACHINE +BIND 4.0X8 MFZN2B3 WE969000
←4.0mmx8mm MFZN2B3
TD DRIVE SHAFT ASSY TA ZJ461400
←TD Shaft ASSY
TRANSDUCER ASSY TA ZJ446000 ←TD ASSY
E model: European model
U model: North America model
Remarks
Parts No.
Description
- 17 -