CP-01 MANUAL CLASSICAL PIANO www.arexx.
CLASSICAL PIANO CP-01 Product information: This piano is an electronic miniature version of the well-known classical piano, containing 49 keys and 23 preprogrammed melodies. The red keys are control keys for the volume, tempo, style and for many other functions. The piano is preprogrammed with 5 different tone-styles and provides a repeat and demo key. The system allows playing preprogrammed melodies, but also allows saving and playing your own melodies.
Contents 1. 2. 3. 4. 5. 6. 7. 8. 9. * * * * * * * Product information 2 Partlist 4 Necessary tools 5 3.1 Soldering techniques 5 Electronic part assembly 6 4.
2. PARTLIST O Piano arm 1 pc. O Feet 4 pcs. each O Piano cover 1 pc. O PCB 1 pc. Tube Feet Sound chip O Speaker 1 pc. O Battery holder 1 pc. O Condensator 6 pcs. O AREXX IC 1 pc. LM386 O Opamp IC 1 pc. O Resistor 14 pcs. O Wire Red 1 pc. Black 1 pc. O Roundhead Screw M2 x 5 13 pcs. O ELCO 3 pcs. O LED 1 pc. O IC Socket 2 Pcs. O Nut M2 10 pcs. Push switch O Flatheadscrew M3 x 8 2 pcs. O Nut M3 6 pcs. O Screw long M3 4 pcs. O O-Ring or Distance holder 4 O Hinge 3 pcs.
CAUTION • Read this manual carefully in advance to fully understand how to assemble this product. • Children below 14 may only assemble this product with the help of adults. • Be careful with the tools. Especially be careful with sharp tools such as nippers or cutter knife to prevent any injuries or accidents. • Never assemble the kit when a younger child is around. The child might touch sharp tools or swallow parts or a vinyl bag. • Be careful with sharp edges of parts.
4. Electronic assembly • Please study the soldering instructions on the previous page first • Check all invidual components with the help of the parts checklist. • Start soldering the resistors and capacitors (passive components) and solder the diode, transistors and IC‘s (active components) after that. • Insert the parts on the PCB top (printed side) and solder the component wire on the bottom to the PCB (Copper side). 4.1.
Push switch White 15 Pcs. Notice Polarity & Marking Push switch Black 10 Pcs. No polarity No polarity Push switch Red 14 Pcs. Push switch Blue 10 Pcs. No polarity No polarity PCB marking □ 1st row (Fa - Fà) □ 2nd row (fa# - re#) □ 3th row (tone & function) □ 4th row (rithme) SEE PAGE 8 Part number Solder the 4 switch pins Remarks Capacitor Polarity & Marking position No polarity. ELCO (ELektrolyt condensator) Important! insert the LED in the correct way, see length of the wires.
5.2. Solder the speaker wire in red spot as 5.3. Assemble the tree hinges halves to the shown in the drawing below PCB top ** Notice new + and - Position!! +SP -SP Vinyl cable Metal hinge assembly. Please notice the direction of the hinges! **! TOP side PCB Speaker The polarity and M3×4 Roundhead screws is not important • Drawing of the assembled PCB TOP Please check if your assembled PCB looks the same way as the drawing. It is important to check the polarity and direction of the parts.
5.5. Install the piano feet to the PCB 5.6. Installing the hinges to the piano cover. NOTICE the correct direction! Install 4 Pcs. Top side (side with the parts). M3 Nut Piano cover Metal hinges NOTICE the correct direction! Feet tube M3 long Roundhead screws M3×4 Roundhead screws Feet 5.7. Assembly of the cover and piano arm Simple measurement line: a. Cut 3 pcs of the plastic tube with a length of about 5 mm, you can use the simple measurement line: 5mm b.
6. FUNCTION TEST a. Insert the batteries into the battery holder. PLEASE NOTICE the correct polarity of the batteries! b. Lift the piano cover and place the piano arm NOTICE: you can stop all playing actions directly with the STOP button! c. Switch on the ON/OFF switch (you will hear a starting tune) CAUTION... if there is any smoke or a component getting very hot, switch off the piano immediately and check all part directions! d. Push any of the white or black push buttons, you must hear a sound.
7. Description of keyboard functions The synthesizer in the Classical Piano has been preprogrammed. Press the instrument key once or repeat the key to change the available instrument styles. Pressing the key will activate the processor to load the synthesizer control parameters from the chips memory into the synthesizer processor. This allows you to switch from playing a piano to playing a trumpet organ.
Demo Toggle between several preprogrammed melodies. Select a preprogrammed melody by pushing the key again. While playing a melody, you may alter the instrument by pressing the tone key and alter the tempo by pressing the tempo keys. Starting another melody will start the tune in a standard tempo. Percusion Hitting this key will select a standard percussion style or an animal sound. Record Toggling this key will activate / deactivate the recording system.
8. What is a synthesizer The word “synthesize“ may be translated to “put things together”. Obviously a synthesizer provides a system to produce any kind of sound, e.g. the sound of a musical instrument or even the sound of a thunderstorm. A synthesizer transforms electrical energy into all kinds of tune signals. These tunes may be transformed by several special effects. A single chip will provide all these functions.
If a guitar player for instance strums one single chord, we will hear a “ploink“sound, which will end abruptly as soon as he lays his finger on the chord. The sound wave starts suddenly with a “pl” in “ploink” (Attack), quickly decreasing (Decay), followed by a constant phase (“oin” = Sustain) and suddenly stopped by a finger at the chord (“k“ = Release).
Mixer: Module, used for mixing several sound waves. Amplifier: Module, used for amplifying the weak synthesizer signals up to a loudspeaker level. Early synthesizer versions were volumineous boxes and cabinets, containing a great number of analog modules and a lot of connecting cabling. Modern integrated circuits and digital signal processing in software tools allowed minimizing size and cabling of the synthesizer equipment.
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