Casio AP-10 User manual

ELECTRONIC KEYBOARD
AP-10
(with price)

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CONTENTS
Safety Notice ......................................................................................2
Specifications.....................................................................................3
Block Diagram....................................................................................4
PCB Layout.........................................................................................5
Disassembly Instructions................................................................. 6
Circuit Description.......................................................................... 10
Major Waveforms .............................................................................12
Troubleshooting...............................................................................13
Wiring Diagram ................................................................................17
Exploded View..................................................................................18
Parts List...........................................................................................21
Schematic Diagrams....................................................................... 23
SAFETY NOTICE
CAUTION!
Danger of explosion if battery is incorrectly replaced.
Replace only with the same of equivalent type recommended
by the appliance manufacturer.Discard used batteries
according to manufacturer's instructions.

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SPECIFICATIONS
GENERAL
Number of keys: 88
Polyphonic: 24-note
Preset tones: 5, Piano-1, Piano-2, Electric Piano, Pipe Organ, Strings
Layer: On/Off
Key transpose: Range of ±1 octave by a semitone increment
Effects: Reverb-1/Reverb-2/Chorus reverb
Demo tunes: 5, 1. Grande valse brillante (F.F. Chopin)
2. One-Eighty (CASIO original)
3. Harmonious blacksmith (G.F. Handel)
4. Fugue in G minor (J.S. Bach)
5. Rainbow (CASIO original)
Memory: Number of songs: 2
System: Real-time recording
Memory capacity: Approx. 1200 notes total
Memory backup battery: Built-in lithium battery
Battery life: Approx. 5 years
Pedals: Damper, Soft/Sostenuto
Tuning control: 440Hz ±50 cents
Built-In Speakers: 14 cm dia. 10 W input rating: 2 pcs.
MIDI: 8-channel, multi-timbral reception
Terminals: Line Out Jacks [Output impedance: 2 KΩOutput voltage: 1.5V (rms) MAX],
Phone Jacks, MIDI Jacks (IN, OUT)
Power source: 120V AC (for U.S.A.)
120V/220V/230V/240V (for other countries)
Power consumption: 35 W (with 120V AC), 30 W (with 220V/230V/ 240V AC)
Dimensions (HWD): Without stand:165 ×1340 ×480 mm (6-1/2 ×52-13/16 ×18-15/16 inches)
With stand: 805 ×1360 ×480 mm (31-11/16 ×53-9/16 ×18-15/16 inches)
Weight: Without stand:25.0 kg (55.1 lbs)/28.0 kg (61.7 lbs)
With stand: 35.5 kg (78.3 lbs)/38.5 kg (84.9 lbs)
Note: There are two models of AP-10, one has a keyboard cover, the other has no keyboard cover.

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Buttons
Keyboard
FI0 ~ FI10
SI0 ~ SI19
KC0 ~ KC7
KI0 ~ KI2
MIDI
INOUT
Working Storage
RAM (64K-bit)
LSI304
LC3564SM-85
MA0
~
MA12
MD0
~
MD7
MD0 ~ MD15
MA1 ~ MA19
Sound Source ROM
(8M-bit)
LSI303
MX23C8100MC-
12CA27
CPU
LSI301
UPD912GF-3BA
BCK, SO, LRCKMA0, MA1
EA0 ~
EIO0 ~
EA14
EIO7
Effect RAM
(256K-bit)
LSI305
LC333832M-70
DSP
LSI302
HG51B227FB
LEDs
VDD
HALL
STAGE
ROOM
SONGA
SONGB
MEMORY
LRCK SO BCK
D/A Converter
LSI306
UPD6379GR
Filter
IC104
Main
Volume
LVDD
VDD
AVCC
AVDD
5V
5V
12.5V
5V
Voltage
Regulator
Q101 ~ 106,
and Q111
T101
Transformer
Power Switch
Power Amplifer
IC101
LA4620
Output
Speakers
Reset IC
IC 302
RN5VD24AA
Line Out Amp.
IC102 LINE OUT L
LINE OUT R
BLOCK DIAGRAM

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PCB LAYOUT
POWER
VOLUME
MIN MAX
TRANSPOSE/
TUNE/MIDI DIGITAL EFFECT CHORUS REVERB
REVERB2
REVERB1
TONE
PIANO E.PIANO HARPSI- CHORD PIPE ORGAN STRINGS
SONG A
SONG B RECORD
START/
STOP
DEMO
MEMORY
OFF
ON
AP-10
MA1MPS2M
PS1M
PS3M
PS4M
CN1M
TP8-KY1M TP8-KY2M
PCB
Main PCB
Sub PCB
Console PCB
Other PCBs
JCM358-
MA1M
PS2M
CN1M
PS1
PS3M
PS4M
Components
CPU, DSP, Sound Source ROM Working storage
RAM, Effect RAM Reset IC, DAC
Filter, Lineout Amp., Power Amp. Power supply cir-
cuit. MIDI input/output.
Main Volume, LEDs, Buttons
Fuse, Noise filter
Head phone Jack
Power lamp

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For keyboard-cover model
2. Disassembling the keyboard cover
2-1. Remove L-shape metal on inside of the side board.
2-2. Slide the keyboard cover to open fully.
2-3. Lift the keyboard cover.
DISASSEMBLY INSTRUCTIONS
1. Disassembling top board
1-1. Remove 8 screws on the rear.
1-2. Slide the top board towards the rear.
The top board will be free from catches
on the case.
1-3. Lift the top board.
For no-keyboard-cover model
2. Disassembling the front cover
2-1. Remove 4 screws at both ends of the front cover.
2-2. Remove the front cover.

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3. Disassembling the console panel
Note: To avoid scratch on the side board, put paper between the console panel and the side board at
both ends.
3-1. The console panel is fixed with screws and nuts.
Holding the nut, remove the screw.
3-2. Remove the screw fixing a grounding wire at the transformer.
3-3. Slide the console panel towards the front to free from catches.
3-4. Turn round the console panel.
3-5. Remove 2 screws fixing the power switch.
Hold this nut.
Insert paper here.
4. Disassembling keyboard unit
4-1. Remove 20 screws on the bottom.
4-2. Disconnect 2 connectors for the keyboard unit on the main PCB.
4-3. Remove the keyboard unit from the case.
Insert paper here.

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5. Disassembling keys
5-1. Remove a key spring.
5-2. Use a long-nose plier, pressing the hook, lift the key.
Apply grease G501
6. Disassembling keyboard PCBs
6-1. Turn around the keyboard unit to face the PCB up.
6-2. Disconnect the connector at middle of the keyboard.
6-3. Remove screws on keyboard PCBs

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7. Replacing the main PCB
Note: The main PCB contains a lithium battery for memory back-up. Please remove the jumper before
replacing the PCB.
And make sure that the jumper is reset on new main PCB after replacing the PCB. Because no
jumper is set on a spare part of the main PCB.
Jumper and short-pin
Lithium battery

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CIRCUIT DESCRIPTION
KEYMATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 A0 1 A0 # 1 B0 1 C1 1 C1 # 1 D1 1 D1 # 1 E1 1
SI0 A0 2 A0 # 2 B0 2 C1 2 C1 # 2 D1 2 D1 # 2 E1 2
EI1 F1 1 F1 # 1 G1 1 G1 # 1 A1 1 A1 # 1 B1 1 C2 1
SI1 F1 2 F1 # 2 G1 2 G1 # 2 A1 2 A1 # 2 B1 2 C2 2
FI2 C2 # 1 D2 1 D2 # 1 E2 1 F2 1 F2 # 1 G2 1 G2 # 1
SI2 C2 # 2 D2 2 D2 # 2 E2 2 F2 2 F2 # 2 G2 2 G2 # 2
FI3 A2 1 A2 # 1 B2 1 C3 1 C3 # 1 D3 1 D3 # 1 E3 1
SI3 A2 2 A2 # 2 B2 2 C3 2 C3 # 2 D3 2 D3 # 2 E3 2
FI4 F3 1 F3 # 1 G3 1 G3 # 1 A3 1 A3 # 1 B3 1 C4 1
SI4 F3 2 F3 # 2 G3 2 G3 # 2 A3 2 A3 # 2 B3 2 C4 2
FI5 C4 # 1 D4 1 D4 # 1 E4 1 F4 1 F4 # 1 G4 1 G4 # 1
SI5 C4 # 2 D4 2 D4 # 2 E4 2 F4 2 F4 # 2 G4 2 G4 # 2
FI6 A4 1 A4 # 1 B4 1 C5 1 C5 # 1 D5 1 D5 # 1 E5 1
SI6 A4 2 A4 # 2 B4 2 C5 2 C5 # 2 D5 2 D5 # 2 E5 2
FI7 F5 1 F5 # 1 G5 1 G5 # 1 A5 1 A5 # 1 B5 1 C6 1
SI7 F5 2 F5 # 2 G5 2 G5 # 2 A5 2 A5 # 2 B5 2 C6 2
FI8 C6 # 1 D6 1 D6 # 1 E6 1 F6 1 F6 # 1 G6 1 G6 # 1
SI8 C6 # 2 D6 2 D6 # 2 E6 2 F6 2 F6 # 2 G6 2 G6 # 2
FI9 A6 1 A6 # 1 B6 1 C7 1 C7 # 1 D7 1 D7 # 1 E7 1
SI9 A6 2 A6 # 2 B6 2 C7 2 C7 # 2 D7 2 D7 # 2 E7 2
FI10 F7 1 F7 # 1 G7 1 G7 # 1 A7 1 A7 # 1 B7 1 C8 1
SI10 F7 2 F7 # 2 G7 2 G7 # 2 A7 2 A7 # 2 B7 2 C8 2
FI
KC
SI
LSI
UPD912GF-3BA
Second contact First contact