Page 2 - SPECIFICATIONS
— 2 — Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Key and switch Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Sche...
Page 3 - BLOCK DIAGRAM
— 3 — BLOCK DIAGRAM OE CE(AR18) AR0 ~ AR17 IO0 ~ IO15 Main Clock 21.7251 MHz Keys and Switches KO4 ~ KO19 KI1 ~ KI8 CPU CDT109-005 ROM HN62414PD25 ROUT LOUT KO22 (APO) VCC AVDD VDD Power Amp. LA4127 Output Power IC LA5668N Filter (R) M5218APR Filter (L) M5128APR Speakers Main Volume Control PG1 Rese...
Page 4 - KEY AND SWITCH MATRIX
— 4 — F#3 G#3 A#3 C#4 D#4 F#4 G#4 A#4 C#5 D#5 F#5 G#5 A#5 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D#3 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 B1 A1 G1 F1 E1 D1 C1 C#3 A#2 G#2 F#2 D#2 C#2 A#1 G#1 F#1 D#1 C#1 Nomenclature of Keys KEY AND SWITCH MATRIX KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8 KO4 C1 C#1 ...
Page 5 - SCHEMATIC DIAGRAMS
— 5 — PCB M5312-MA1M SCHEMATIC DIAGRAMS 12 14 9 11 8 10 15 13 , , 1 6 7 4 5 3 2 Power IC PG2 PowerAmp. PG1 C P U ROM Reset IC DAC Filter
Page 8 - PCB VIEW
— 8 — PCB VIEW 6 7 3 5 4 1 2 8, 10 9, 11 13, 15 12,14
Page 9 - MAJOR WAVEFORMS
— 9 — MAJOR WAVEFORMS Signal MICDT109-005 pin 6Power ON 1 DATALC7881C pin 8 4 BCKLC7881C pin 9 5 LRCKLC7881C pin 6 6 WCK1LC7881C pin 7 7 Key scan signal KO9CDT109-005 pin 44 2 Key scan signal KO19CDT109-005 pin 34 3 DAC output: LC7881C pin 1 8 DAC output: LC7881C pin 20Tone: FluteKey: A3 9 DAC outpu...
Page 10 - TROUBLESHOOTING
— 10 — TROUBLESHOOTING Nature of Trouble Faulty Block Checkpoint No power Power IC (LA5668N) Pin 2 should have +9 V. Power jack Jack contact. No sound at all Power IC (LA5668N) Pin 6 should have +5 V. Power amp (LA4127) Check output signals of pins 1 and 20. Main clock generator Check oscillation at...
Page 11 - EXPLODED VIEW
— 11 — EXPLODED VIEW 24 3 19-1 16 15 23 17 13 18 6 7 8 9 14 10 11 12 10 8 1 4 23 2 20 21 22 19 19-2 5
Page 12 - Prices and specifications are subject to change with-; PARTS LIST
Notes: 1. Prices and specifications are subject to change with- out prior notice. 2. A s f o r s p a r e p a r t s o r d e r a n d s u p p l y , r e f e r t o t h e" G U I D E B O O K f o r S p a r e p a r t s S u p p l y " , p u b l i s h e dseperately. 3. The numbers in item column corresp...