Yamaha disklavier Mark III Series, Maintenance Handbook

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1. Test pattern play & check - Check playability
* MAINTENANCE *
*** MODE GP **
***** TEST *****
***** PLAY *****
1.ppp t100 v001
K=XX V=XXX T=XXX
Start/
pause
2.mf t100 v050
K=XX V=XXX T=XXX
3.5Hz t100 v064
K=XX V=XXX T=XXX
4.LOUD HP CHECK
PEDAL 000 ->000
5.LOUD SW CHECK
PEDAL 000 ->000
6.LOUD TIMING F
PEDAL 000 -> 000
+
Power
00
R
01
01
01
01
01
01
01
Continued
1. Minimum-pressure single note scale (Legato)
a. Check for evenness of tone
b. Velocity reference — less than 040 = good
c. Timing reference — around 125 = good
Reasons for incorrect Uneven piano regulation, piano
condition table, solenoid
Countermeasures Piano regulation, keyboard measure-
ment, keyboard adjustment
2. Standard volume single note scale (Staccato)
a. Check for evenness of tone
b. Velocity reference — around 050 = good
c. Timing reference — around 125 = good
Uneven piano regulation, piano table
Piano regulation, keyboard measurement
3. Five continuous strokes
a. Check for repetition
b. Velocity reference — around 064 = good
c. Timing reference — around 125 = good
Uneven piano regulation, piano table
Piano regulation, keyboard measurement
4. Sustain pedal(half pedal) action check
a. Check the half pedal (incremental) operation
Inadequate piano pedal adjustment,
piano table
Piano pedal adjustment, sustain pedal
measurement
5. Sustain pedal (switch pedal) action check
a. Check the operation
b. Check noise
Inadequate piano pedal adjustment,
piano table
Piano pedal adjustment, sustain pedal
measurement
6. Sustain pedal timing check (fast)
a. Check simultaneous action of pedal and key striking
1.ppp t100 v001
K
=
XX V
=
XXX T
=
XXX
Timing
(on full-function models only)
Data display : TEST 1~3
Tempo (050%~200%) Playback velocity (001~127)
Measured velocity data
Key No.
Tempo; button, 100%
← →
200%: button
Playback velocity : By using the , button
ENTER
–/NO
+/YES
4.LOUD HP CHECK
PEDAL 000 ->000
Pedal drive data
Pedal measurement
data
Data display : TEST 4~16