DU1A
65
8 STEP MAINTENENCE for the PIANO TECHNICIAN (Minimum 4 are necessary.)
STEP 2
BEFORE REMOVING THE ACTION
Disconnect the connectors before the action is removed. (Fig.1)
Fig. 2
Fig. 3
Fig. 1
STEP 1
Check if the hammer shank stopper do not disturb the dampers or hammers
movement during normal playing. --> OK STEP 2
Hammer shank stopper height/lateral adjustment is necessary if any disturbing
happens. --> STEP 7
Turn on the power then depress and lock the
center pedal to enter the silent mode. The
hammer shank stopper moves 8mm toward front.
Check if the acoustic sound doesn't come
out during playing keyboard with mf (Mezzo
forte level). If no sound comes, then the
distance between hammer head and strings
will be within 4.5mm-7mm when the hammer
shank touches the shank stopper cushion.
(Fig.3) --> OK STEP 3
Shank stopper must be adjusted to the front
if the acoustic sound comes. --> STEP 8
If the balance of the same section is not
even (ex.bass), --> STEP 6
Note:Hammer let off (set off) adjustment
must be 1mm wider than the adjusted
silent mode distance.
Hammer shank stopper
Piano maintenance part
Service Manual
PP 008600
