SILENT SB SERIES
29
•CONFIRM THE SYMPTOMS
Fig. 10
In order to get more information or replacing parts about these models, Yamaha service desk reqires the correct model
name and serial number. (Sometimes electorical serial number and the sensor or tone generator version.) Refer to the
sticker on the bottom of the switch box under the keybed. (Fig. 10)
The sensor board and the tone generator version will be shown by using TEST MODE 2.
TEST MODE 2
Hold A#, C#, D# (2, 5, 7 keys) simultaneously and
turn on the power unitl it clicks, then release keys.
The number of notes show the versions.
Sensor version:
An ascending scale in C major, starting on the lowest C.
(Ex. "Do" and "Re" mean version 2)
Sensor Version: An descending scale in C major, starting on the highest C.
(Ex. "Do" and "Si" mean version 2)
Fig. 11
Shutter base is not glued and can be removed with a pliers
How to replace shutter and shutter base
Key Shutter (V7978300)
•
DIP SWITCH ON MN BOARD
Silent pianos include a 4-bit DIP-switch on the MN board. During normal use the switch bits (SW1 to SW4) are
generally all set to OFF, but during servicing or maintenance you can use them to execute function checks as
described below. Please turn power OFF before changing the DIP-switch settings, and then turn power back ON to
activate the new settings.
SW1
SW2
SW2 + SW3
SW4
Always OFF
SENSOR TEST MODE
DEMO PEFORMANCE
Always OFF
Forces the silent piano into Sensor Test mode.
Use this feature if for some reason you are unable start up test mode
using the keyboard.
Starts demo playback.
Allows you to check the state of the tone-generator. (Operation is not
affected by the sensors.)
No use
No use
•
GRAY-SCALE KEY SHUTTER
Service Manual
PP 008599
Piano maintenance part
Содержание Silent SB Series
Страница 17: ...SILENT SB SERIES 17 MN V798670 MN Circuit Board Pattern side ...
Страница 23: ...SILENT SB SERIES 23 ...