CASIO CPS130 Service Manual

CPS-130

INDEX

CPS-130 is similar to CPS-100. Refer to the CPS-100 service manual
for the circuit description that are not covered in this manual.

(without price)

CPS-130

ELECTRIONIC KEYBOARD

CONTENTS

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Key and switch Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PCB View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

SPECIFICATIONS

General

Number of keys: 61
Polyphonic: 10-note
Preset tones: 5, including: Piano, Harpsichord, Vibraphone, Jazz organ, Pipe organ
Demonstration tune: Ballade Pour Adeline
Tuning control: 442 Hz ±30 cents
Built-in speakers: 12.0 cm dia. 1.1 W Input Rating: 2 pcs.
Terminals: Output jack [Output impedance:30 Ω, Output voltage: 1.2 V (rms) MAX]

Sustain jack, AC adapter Jack (DV 9 V)

Power source: DC: 6 D size dry batteries

Battery life: Approx. 10 hours (SUM-1/R20P)

AC: AC Adapter AD-5
Power consumption: 4.2 W
Dimensions (HWD): 116 x 970 x 364 mm

(4-5/8 x 38-1/4 x 14-3/8 inches)
Weight: 8.4 kg (18.5 lbs) including batteries

Electrical

Current drain with 9 V DC:
No Sound Output 80 mA ± 20%
Maximum volume 350 mA ± 20%

with any 10 keys pressed in Piano tone
Volume: Maximum, Sustain: ON
Phone output level (Vrms with 8 Ω load each channel) 87 mV ± 20 %

with key C5 pressed in Piano tone, Volume: Maximum
Line output level (Vrms with 47 kΩ load each channel) 470 mV ± 20 %

with key C5 pressed in Piano tone, Volume: Maximum
Minimum operating voltage: 6.5 V

— 2 —

BLOCK DIAGRAM

Keys and Switches

— 3 —

Output

Speakers

Power Amp.

LA4127

Main Volume

Control

DVDD

Power IC
LA5668N

Filter (R)

M5218APR

Filter (L)

M5128APR

VCCAVDDVDD

ROUT

LOUT

(APO)

DAC

LC7881C

DATA

WCK1
LRCK

KO22

KI1 ~ KI8

BCK

CPU

CDT109-005

KO4 ~ KO19

Reset IC

S8053ALR

Reset

CE(AR18)

OE

ROM

AR0 ~ AR17

HN62414PD25

IO0 ~ IO15

PG2

MIDI Clock

2 MHz

PG1

Main Clock

21.7251 MHz

KEY AND SWITCH MATRIX

KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8

KO4 C1 C#1 D1 D#1 E1 F1

KO5 F#1 G1 G#1 A1 A#1 B1

KO6 C2 C#2 D2 D#2 E2 F2

Demon-

stration

KO7 F#2 G2 G#2 A2 A#2 B2

KO8 C3 C#3 D3 D#3 E3 F3

KO9 F#3 G3 G#3 A3 A#3 B3

KO10 C4 C#4 D4 D#4 E4 F4

KO11 F#4 G4 G#4 A4 A#4 B4

KO12 C5 C#5 D5 D#5 E5 F5

KO13 F#5 G5 G#5 A5 A#5 B5

KO14 C6

KO16 Piano Jazzorgan Pipeorgan

Harpsi-

chord

Vibra-

phone

KO18 Power OFF Power ON

KO19 (Sustain)

Nomenclature of Keys

C#1

G#1F#1D#1

C#2

A#1

B1A1G1F1E1D1C1

C2 D2E2F2G2A2 B2 C3 D3

F#2D#2

C#3A#2G#2

F#3 G#3

D#3

E3

F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5

A#3 C#4 D#4

F#4 G#4

A#4

C#5

D#5

— 4 —

F#5 G#5

A#5

C6

PCB M5312-MA1M

SCHEMATIC DIAGRAMS

Power IC

13

15

12 14

Filter

9 11

8 10

,

PG2

Power
Amp.

PG1

3

2

C P U

,

1

DAC

Reset IC

6

7

4
5

ROM

— 5 —