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Casio Privia PX-720, Service Manual & Parts Manual

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Casio Privia PX-720 Service Manual & Parts Manual Download Page 33

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Console PCBs M681-CNA2, CNA3, CNA4

Console PCB M681-CNA2

Console PCB M681-CNA3

Console PCB M681-CNA4

Summary of Contents for Privia PX-720

Page 1: ...ELECTRONIC KEYBOARD without price PX 720 PX 720C SEP 2007 Ver 6 Oct 2015 PX 720C INDEX...

Page 2: ...ONTENTS SPECIFICATIONS 1 BLOCK AND WIRING DIAGRAM 2 PCB LAYOUT 3 CIRCUIT DESCRIPTION 4 PRINTED CIRCUIT BOARDS 5 DISASSEMBLY 7 DIAGNOSTIC PROGRAM 18 EXPLODED VIEW 21 PARTS LIST 23 SCHEMATIC DIAGRAMS 27...

Page 3: ...Tracks 2 Capacity Approximately 5 000 notes total Recorded Data Protection Built in ash memory Pedals Damper soft sostenuto Other Functions Touch Select 3 types Off Transpose 2 octaves 12 to 0 to 12...

Page 4: ...r Supply Circuit IC202 Q206 Q207 12V VA12 5V VD5 5V VE5 12V VC Speakers L R Main Volume CONSOLE PCB M681 CNA1 CONSOLE PCB M406 CNA4 Keyboard PCBs MCPZ KYA1 KYB2 KYA3 SUB PCB M408 PSA1 CONSOLE PCB M681...

Page 5: ...DAC Key controller SUB PCB M408 PSA1 Power supply circuit Filter Power amplifer Console PCBs M681 CNA1 Button Main volume M681 CNA2 Phones jack M681 CNA3 DC 12V terminal MIDI OUT IN terminals M681 CN...

Page 6: ...D5 E5 SI6 A4 A4 B4 C5 C5 D5 D5 E5 FI7 F5 F5 G5 G5 A5 A5 B5 C6 SI7 F5 F5 G5 G5 A5 A5 B5 C6 FI8 C6 D6 D6 E6 F6 F6 G6 G6 SI8 C6 D6 D6 E6 F6 F6 G6 G6 FI9 A6 A6 B6 C7 C7 D7 D7 E7 SI9 A6 A6 B6 C7 C7 D7 D7 E...

Page 7: ...5 PRINTED CIRCUIT BOARDS Main PCB M408 MDA1 Sub PCB M408 PSA1...

Page 8: ...6 Console PCB M681 CNA1 Console PCB M681 CNA2 Console PCB M681 CNA3 Console PCB M681 CNA4...

Page 9: ...hen assembling 1 Remove the Connector and Pedal cord 2 Remove 2 screws and then the Pedal unit 3 To damage neither the oor nor the main body the main body is put on the mat or the blanket etc 4 Remove...

Page 10: ...y 1 Remove the 20 screws and then the back of the speaker box 2 Remove the 4 screws for each speaker and then take out the speakers left and right Removing the T BRD UNIT 1 Remove 18 screws and then t...

Page 11: ...ove the 4 screws and the 2 stoppers on the left and right ends Precautions During Assembly To avoid any risk of damaging the stoppers during installation do not use an electric screwdriver 2 Remove th...

Page 12: ...10 Removing the PCBs M408 MDA1 PCB M408 PSA1 PCB M681 CNA3 PCB 1 Remove the twist ties that hold the cables in place 3 Remove the PCB case M408 MDA1 PCB M408 PSA1 PCB M681 CNA3 PCB 2 Remove 8 screws...

Page 13: ...Connector SPEAKER R Connector M681 CNA4 Connector Pedal FPC Keyboard Connector M408 MDA1 Connector M681 CNA3 Connector M681 CNA2 Connector SPEAKER L Connector Power SW 5 Remove 4 screws and the M408...

Page 14: ...hen the Pedal connector Removing the Front board 1 Remove the 10 screws and lift up the front board The panel is still connected by a lead 2 Remove the front board Front board Removing the M681 CN4 PC...

Page 15: ...13 To remove the CN PANEL 2 Remove 4 screws and the CN PANEL CN PANEL Removing the Side block 1 Remove the 6 screws left and right The left side The right side 2 Remove the side units left and right...

Page 16: ...CNA1 PCB M681 CNA2PCB 1 Remove the side case 4 Remove 4 screws 5 Remove the volume knob and the rubber key and M681 CNA1 PCB 2 Remove 2 screws and the M681 CNA2 unit 3 Remove 2 nuts and the M681 CNA2...

Page 17: ...15 Disassembling the right side unit Power switch 1 Remove the side case 2 Remove 2 screws and the Power switch Power switch...

Page 18: ...16 2 Remove 24 screws and then the KEY BOARD ASSY 3 Remove the keys To remove the Keyboard 1 Remove 2 screws and then 2 brackets...

Page 19: ...er keys One of the keys has the different length from others 5 Remove 9 screws then the MCPZ KYA1 PCB 6 Remove 11 screws then the MCPZ KYB2 PCB 7 Remove 9 screws then the MCPZ KYA3 PCB How to install...

Page 20: ...NOME RECORDER and buttons at the same time turn the power ON Wait for con rmation chords C4 E4 G4 sound 2 Release METRONOME RECORDER and buttons Diagnostic program 1 Automatic Test RAM check ROM check...

Page 21: ...nal ROM 07061813550 0 7 0 6 1 8 1 3 5 5 External ROM 07061813550 0 7 0 6 1 8 1 3 5 5 Internal ROM LED Sequence External ROM LED Sequence 1 0 LED 1 0 LED 2 7 L CLASSIC LED 2 7 L CLASSIC LED 3 0 LED 3 0...

Page 22: ...rom the jack L LED lights There are 2 headphone jacks Repeat Steps for each jack Press TONE SETTING button to nish the headphone check The con rmation chords C4 E4 G4 sound and the light on L LED turn...

Page 23: ...21 EXPLODED VIEW 26 25 27 4 6 30 28 29 13 15 20 21 22 12 10 11 40 42 41 43 39 37 31 38 47 1 48 9 14 19 18 17 16 29 28 49 69 36 1 35 36 32 33 34 24 2 3 5 45 45 42 44 7 50 8 23 68 68 46 43 1...

Page 24: ...22 Screw 8 Screw cap 8 Screw 2 Screw cap 2 Clip 2 56 67 54 55 66 66 70 71 53 57 52 51 60 61 64 59 62 58 63 58 65 51 3 51 4 51 2 51 1 51 5 52 3 52 2 52 1 52 5 52 4...

Page 25: ...spare parts department if you need these parts for refurbish 1 Prices and speci cations are subject to change without prior notice 2 As for spare parts order and supply refer to the GUIDEBOOK for Spa...

Page 26: ...1 1 1 1 1 1 1 AA C Q201 204 206 208 212 10206673 TRANSISTOR KTC3199 GR AT P 5 5 5 5 5 5 5 5 5 5 AA C CONSOLE N 3 10286861 PCB ASSY CNA3 TK RJM508135 001 1 1 1 1 1 1 1 1 1 1 BW C J603 10208247 CONNECT...

Page 27: ...WITCH THVV502GAA 7 7 7 7 7 7 7 7 7 7 AA X N 36 10286860 PCB ASSY CNA2 TK RJM508133 001 1 1 1 1 1 1 1 1 1 1 CD C N 36 1 10281486 BRACKET RJM507979 001V01 1 1 1 1 1 1 1 1 1 1 AC X J601 602 10171449 CONN...

Page 28: ...BOARD SPEAKER RJM505681 002V01 1 1 1 1 1 CN X 57 10127139 CONNECTOR ELP 4P 134 M417 1 1 1 1 1 1 1 1 1 1 AL C 58 10203698 NUT S WLA0 4X16Z3NQ 8 8 8 8 8 8 8 8 8 8 AA X N 59 10286837 BOARD ASSY PEDAL TK...

Page 29: ...27 SCHEMATIC DIAGRAMS Main PCB M408 MDA1...

Page 30: ...28...

Page 31: ...29 Sub PCB M681 PSA1...

Page 32: ...30 Console PCB M681 CNA1...

Page 33: ...31 Console PCBs M681 CNA2 CNA3 CNA4 Console PCB M681 CNA2 Console PCB M681 CNA3 Console PCB M681 CNA4...

Page 34: ...pecifics of PCB LAYOUT was added P3 Ver 2 Dec 2007 Correction of the EXPLODED VIEW P21 to P22 Correction of the PARTS LIST P25 to P26 Ver 3 Jan 2008 Correction of the PARTS LIST P26 Ver 4 Feb 2009 Cor...

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