CPS-85
CPS-85
ELECTRONIC KEYBOARD
POWER
VOLUME
TRANSPOSE
OFF
ON
MIN
MAX
F
# GA
B C
D
E
AB
C
#
EF
DIGITAL EFFECT
TONE
MEMORY
PIANO 1
PIANO 2
E. PIANO 1
E. PIANO 2
HARPSI-
CHORD
VIBRA-
PHONE
PIPE
ORGAN
JAZZ
ORGAN
STRINGS
SYNTH-
STRINGS
SELECT
SONG A
SONG B
RECORD
STOP
START
CONTROL
DEMO
1
5
10
152025
-- 1 --
CONTENTS
Page
Specifications ............................................................................................................................................ 1
Block Diagram ........................................................................................................................................... 3
Circuit Description ..................................................................................................................................... 4
Major Waveforms .................................................................................................................................... 11
Printed Circuit Boards ............................................................................................................................. 12
Schematic Diagrams ............................................................................................................................... 13
Exploded View ....................................................................................................................................... 19
Parts List ................................................................................................................................................. 21
SPECIFICATIONS
GENERAL
Keyboard:
88 full size keys with initial touch response
Polyphony:
24 notes maximum
Tones:
10 (with layering)
Tuning curves:
3 types (preset for each tone)
Digital effects:
REVERB
Demo tunes
Number of tunes:
10
Titles:
1. Grande valse brillante
2. Turkish March
3. One-Eighty
4. Opaque Mist
5. Harmonious blacksmith
6. Dream Sequence
7. Fugue in G minor
8. Moveable Blues
9. Rainbow
10. Ave Maria
Playback:
Repeat sequential play of all tunes; playback always starts from begin-
ning of tune
Manual memory
Type:
Real-time recording and playback
Number of songs:
2 (SONG A, SONG B)
Capacity:
Approximately 1,200 notes (SONG A + SONG B)
Back-up:
Power supplied by batteries or AC adaptor
Pedal:
Damper
Other features
Transpose (
±1 octave, semitone steps)
Tuning (adjustable, A4 = 440 Hz
± 50 cents)
MIDI:
8-channel multi-timbre reception
Speakers:
14 cm
× 2 (6 W + 6 W)
Terminals:
PHONES (standard stereo jack
× 1)
LINE OUT (standard mono jack
× 2)
Output impedance: 1.0 K
Output voltage: 1.5 V (RMS) MAX
LINE IN (standard mono jack
× 2)
Input impedance: 47 K
Sensitivity: 200 mV
MIDI OUT/IN (DIN jack
× 2)
-- 2 --
ELECTRICAL
Current drain with 12 V DC:
No sound output
240 mA
± 20 %
Maximum volume
with 24 keys from C1 to B2 pressed in Jazz organ tone
2050 mA
± 20 %
Volume: maximum, Touch response: maximum
Phone output level (Vrms with 8
load each channel):
with key E3 pressed in Jazz organ tone
L-ch
60 mV
± 20 %
R-ch
65 mV
± 20 %
Speaker output level (Vrms with 4
load each channel):
with key E3 pressed in Jazz organ tone
L-ch
860 mV
± 20 %
R-ch
920 mV
± 20 %
Lineout output level (Vrms with 47 k
load each channel):
with key B5 pressed in Jazz organ tone
L-ch
140 mV
± 20%
R-ch
160 mV
± 20%
Minimum operating voltage:
6.5 V
DAMPER PEDAL (standard mono jack
× 1)
DC 12 V (DC jack
× 1)
Power supply
Dual power supply system
Batteries:
6 D-size batteries
Battery life:
Approximately 4 hours on manganese batteries
AC adaptor:
AD-12
Auto power off:
Turns power off approximately 5 minutes after last key operation.
Enabled under battery power only, can be disabled manually.
Power consumption:
18 W
Dimensions (HWD):
100
× 1372 × 414 mm (without stand)
(3-15/16
× 54-1/16 × 16-5/16 inches)
Weight:
Without stand and excluding batteries 16.8 kg (37.1 lbs)
-- 3 --
BLOCK DIAGRAM
Buttons
Keyboard
FI0 ~ FI10
SI0 ~ SI10
KC0 ~ KC7
KI0 ~ KI2
MIDI
IN
OUT
Working Storage
RAM (64K-bit)
LSI2
HY6264ALLJ-70
MA0
~
MA12
MD0
~
MD7
MD0 ~ MD15
MA1 ~ MA19
Sound Source ROM
(8M-bit)
LSI3
MX23C1610MC-12
CPU
LSI4
GT913F
BCK, SO, LRCK
MA0, MA1
EA0 ~
EIO0 ~
EA14
EIO7
Effect RAM
(256K-bit)
LSI5
TC55257DFL-70L
DSP
LSI1
HG51B277FB
LEDs
VDD
SONGA
SONGB
DIGITAL EFFECT
SELECT
STOP
LRCK
SO
Rmel
Lmel
BCK
D/A Converter
LSI6
UPD6379GR
Filter
IC104
Main
Volume
Power Amplifier
IC101
LA4620
Output
Speakers
Reset IC
IC 1
RN5VD35AA
Pre. Amp.
IC103
Line In
POWER (APO)
Power Supply Circuit
Q101 ~ Q106
D108, D110, D111
6
× D-size batteries
AC adaptor AD-12
From CPU
Line Out
AVCC
VDD
VCC
AVDD
LVDD
-- 4 --
CIRCUIT DESCRIPTION
KEY MATRIX
Note: Each key has two contacts,
the first conatct (1) and second contact (2).
Key
Second contact (2)
First contact (1)
KC
SI
FI
0
C
K1
C
K2
C
K3
C
K4
C
K5
C
K6
C
K7
C
K
0
I
F
)
1
(
0
A)
1
(
0
#
A)
1
(
0
B)
1
(
1
C)
1
(
1
#
C)
1
(
1
D)
1
(
1
#
D)
1
(
1
E
0
I
S
)
2
(
0
A)
2
(
0
#
A)
2
(
0
B)
2
(
1
C)
2
(
1
#
C)
2
(
1
D)
2
(
1
#
D)
2
(
1
E
1
I
F
)
1
(
1
F)
1
(
1
#
F)
1
(
1
G)
1
(
1
#
G)
1
(
1
A)
1
(
1
#
A)
1
(
1
B)
1
(
2
C
1
I
S
)
2
(
1
F)
2
(
1
#
F)
2
(
1
G)
2
(
1
#
G)
2
(
1
A)
2
(
1
#
A)
2
(
1
B)
2
(
2
C
2
I
F
)
1
(
2
#
C)
1
(
2
D)
1
(
2
#
D)
1
(
2
E)
1
(
2
F)
1
(
2
#
F)
1
(
2
G)
1
(
2
#
G
2
I
S
)
2
(
2
#
C)
2
(
2
D)
2
(
2
#
D)
2
(
2
E)
2
(
2
F)
2
(
2
#
F)
2
(
2
G)
2
(
2
#
G
3
I
F
)
1
(
2
A)
1
(
2
#
A)
1
(
2
B)
1
(
3
C)
1
(
3
#
C)
1
(
3
D)
1
(
3
#
D)
1
(
3
E
3
I
S
)
2
(
2
A)
2
(
2
#
A)
2
(
2
B)
2
(
3
C)
2
(
3
#
C)
2
(
3
D)
2
(
3
#
D)
2
(
3
E
4
I
F
)
1
(
3
F)
1
(
3
#
F)
1
(
3
G)
1
(
3
#
G)
1
(
3
A)
1
(
3
#
A)
1
(
3
B)
1
(
4
C
4
I
S
)
2
(
3
F)
2
(
3
#
F)
2
(
3
G)
2
(
3
#
G)
2
(
3
A)
2
(
3
#
A)
2
(
3
B)
2
(
4
C
5
I
F
)
1
(
4
#
C)
1
(
4
D)
1
(
4
#
D)
1
(
4
E)
1
(
4
F)
1
(
4
#
F)
1
(
4
G)
1
(
4
#
G
5
I
S
)
2
(
4
#
C)
2
(
4
D)
2
(
4
#
D)
2
(
4
E)
2
(
4
F)
2
(
4
#
F)
2
(
4
G)
2
(
4
#
G
6
I
F
)
1
(
4
A)
1
(
4
#
A)
1
(
4
B)
1
(
5
C)
1
(
5
#
C)
1
(
5
D)
1
(
5
#
D)
1
(
5
E
6
I
S
)
2
(
4
A)
2
(
4
#
A)
2
(
4
B)
2
(
5
C)
2
(
5
#
C)
2
(
5
D)
2
(
5
#
D)
2
(
5
E
7
I
F
)
1
(
5
F)
1
(
5
#
F)
1
(
5
G)
1
(
5
#
G)
1
(
5
A)
1
(
5
#
A)
1
(
5
B)
1
(
6
C
7
I
S
)
2
(
5
F)
2
(
5
#
F)
2
(
5
G)
2
(
5
#
G)
2
(
5
A)
2
(
5
#
A)
2
(
5
B)
2
(
6
C
8
I
F
)
1
(
6
#
C)
1
(
6
D)
1
(
6
#
D)
1
(
6
E)
1
(
6
F)
1
(
6
#
F)
1
(
6
G)
1
(
6
#
G
8
I
S
)
2
(
6
#
C)
2
(
6
D)
2
(
6
#
D)
2
(
6
E)
2
(
6
F)
2
(
6
#
F)
2
(
6
G)
2
(
6
#
G
9
I
F
)
1
(
6
A)
1
(
6
#
A)
1
(
6
B)
1
(
7
C)
1
(
7
#
C)
1
(
7
D)
1
(
7
#
D)
1
(
7
E
9
I
S
)
2
(
6
A)
2
(
6
#
A)
2
(
6
B)
2
(
7
C)
2
(
7
#
C)
2
(
7
D)
2
(
7
#
D)
2
(
7
E
0
1
I
F
)
1
(
7
F)
1
(
7
#
F)
1
(
7
G)
1
(
7
#
G)
1
(
7
A)
1
(
7
#
A)
1
(
7
B)
1
(
8
C
0
1
I
S
)
2
(
7
F)
2
(
7
#
F)
2
(
7
G)
2
(
7
#
G)
2
(
7
A)
2
(
7
#
A)
2
(
7
B)
2
(
8
C
0
I
K
L
A
T
I
G
I
D
T
C
E
F
F
E
/
1
O
N
A
I
P
2
O
N
A
I
P
/
1
O
N
A
I
P
.
E
2
O
N
A
I
P
.
E
-
C
I
S
P
R
A
H
/
D
R
O
H
-
H
P
A
R
B
I
V
E
N
O
E
P
I
P
/
N
A
G
R
O
Z
Z
A
J
N
A
G
R
O
/
S
G
N
I
R
T
S
H
T
N
Y
S
S
G
N
I
R
T
S
T
C
E
L
E
S
/
A
G
N
O
S
B
G
N
O
S
1
I
K
D
R
O
C
E
RL
O
R
T
N
O
CO
M
E
D
-
O
P
S
N
A
R
T
#
F
E
S
-
O
P
S
N
A
R
T
#
G
E
S
-
O
P
S
N
A
R
T
#
A
E
S
-
O
P
S
N
A
R
T
D
E
S
-
O
P
S
N
A
R
T
E
E
S
2
I
K
P
O
T
ST
R
A
T
S
-
O
P
S
N
A
R
T
G
E
S
-
O
P
S
N
A
R
T
A
E
S
-
O
P
S
N
A
R
T
B
E
S
-
O
P
S
N
A
R
T
#
C
E
S