ELECTRONIC KEYBOARD
AP-22S
-- 2 --
CONTENTS
Safety Notice ...................................................................................... 2
Specifications .................................................................................... 4
Block Diagram ................................................................................... 5
PCB Layout ........................................................................................ 6
Disassembly Instructions ................................................................. 7
Circuit Description .......................................................................... 11
Major Waveforms ............................................................................. 13
Printed Circuit Board ...................................................................... 14
Troubleshooting .............................................................................. 15
Wiring Diagram ................................................................................ 19
Exploded View ................................................................................. 20
Parts List .......................................................................................... 23
Schematic Diagrams ....................................................................... 25
SAFETY NOTICE
CAUTION!
Danger of explosion if battery is incorrectly replaced. Replace
only with the same or equivalent type.
-- 3 --
DENMARK:
FINLAND:
SWEDEN:
VAROITUS
Paristo voiäjähtää, jos se on virheellisesti asennettu. Vaihda
paristo ainoastaan valmistajan suosittelemaan tyyppiin. Hävitä
käytetty paristo valmistajan ohjeiden mukaisesti.
VARNING
Felaktigt batteribyte kan medf fara för explosion. Använd där-
för endast samma typ eller likvärdig typ enligt apparat-
tillverkarens rekommendation.
Kassera förbrukade batterier enligt tillverkarens anvisning.
ADVARSE!
Lithiumbatteri. Eksplosionsfare ved fejlagtig handtering.
Udskiftning ma kun ske med batteri af samme fabrikat og type.
Lever det brugte batteri tilbage tili leverandoren.
-- 4 --
SPECIFICATIONS
GENERAL
Keyboard:
88 piano keys (with touch response)
Polyphony:
32 notes, maximum
Tones:
· 10 (including two bass tones)
· Tuning Curves: 3 (preset for each tone)
· Layer: Adjustable volume
· Split: Split point, adjustable volume
Digital Effects:
Reverb (4 types), Chorus, Tremolo, Brilliance
Demo Tunes:
· Number of Tunes: 8
· Playback: Repeat (all tunes, one tune)
Memory:
· Operations: Real-time recording, playback
· Number of Tracks: 2 (Track A, Track B)
· Capacity: Approximately 5,000 notes (total of 2 tracks)
· Memory Backup: Built-in lithium battery (Battery Life: 5 years)
Song Lesson:
· Number of Tunes: 80
· Playback: All song repeat, specific song
· Part Off: L, R
· Phrase Repeat
Pedals:
Damper, Soft, Sostenuto
Other Functions:
· Metronome: Beat (6 types), Tempo
( = 30 to 300)
· Touch Select: 3types
· Transpose: 1 octave (F# to C TO F)
· Tuning: A4 + 440 Hz
±13 Hz (adjustable)
· Temperament: 7 types
· Baroque pitch
MIDI:
16 multi-timbre receive
Input/Output:
· Headphones: Standard stereo jacks
× 2
· LINE OUT (R)(L): Standard stereo jacks
× 2
Output impedance 22 K
Output voltage: 2.0 V (RMS) MAX
· LINE IN (R)(L):
Standard stereo jacks
× 2
Input impedance: 30 K
Input voltage 200 mV
· MIDI (OUT)(IN)
Speakers:
ø 16 cm
× 2, ø 5 cm x 2 (Output: 30 W + 30 W)
Power Supply:
120 V (for U.S.A.), 120 V, 220 V, 230 V and 240 V (for other countries) AC
household current via AC power cord supplied with piano.
Power Consumption:
70 W (with 120 V AC), 90 W (with 220 V, 230 V and 240 AC)
Dimensions:
· CELVIANO Only: 139
× 54 × 25 cm (5.5 × 2.1 × 1.0 inch)
· CELVIANO and Stand: 139
× 54 × 88 cm (5.5 × 2.1 × 3.5 inch)
Weight:
· CELVIANO Only: approximately 48.5 kg (106.9 lbs)
· CELVIANO and Stand: approximately 60.2 kg (132.7 lbs)
Accessories:
Stand with three pedals, score book, power cord
-- 5 --
BLOCK DIAGRAM
SOLM, SOLP
BDK, WOK1, SORM, SORP
FI0 ~ 10
SI0 ~ 10
DSP
HG51B155FD
RAM
256K
TC55257DFL-
70L
ROM
8M
MX23C8000MC-
12CA73
CPU
HD6435328RF35F
PEDAL
MIDI
IN
OUT
ROM
24M
MX23C2410MC-
12CA58
RAM
256K
× 2
TC55257DFL-
70L
× 2
Keyboard
Controller
HG52E35P
Switch & LED
Controller
µPD65005GF-419
D/A Converter
µPD6376GS
D/A Converter
µPD6376GS
Filter
Mixer, Mute Circuit
Power Amp.
STK4132MK
RA0 ~ 22
RD0 ~ 15
EA0 ~ 14
ED0 ~ 15
D0 ~ 7
D0 ~ 7
L18 ~ 28
KI0 ~ 3
LA ~ LG, LP
LK8 ~ 14
LEDs
Buttons
Keyboard
KC0 ~ 7
Main
Volume
AVCC
AVDD
AVFF
VDD
+15V
+5V
15V
+5V
Power
Switch
Power
Transformer
T101
Reset IC
MB3771PF
RST
MUTE
BRILLIANCE
M-IN
M-OUT
PB4 ~ 6
Filter
LINE IN
Tweeter
Tweeter
HEADPHONE
SP
SP
LINE OUT
P70 ~
P77
P12 ~
P14
NJM78M78M15FA
NJM78L05A
NJM7805FA
A0 ~ 14
A0 ~ 19
Voltage
selector