Casio CPS-85- Manuals

Page 2 - CONTENTS; SPECIFICATIONS; GENERAL

— 1 — CONTENTS Page Specifications ............................................................................................................................................ 1Block Diagram ................................................................................................................

Page 3 - ELECTRICAL

— 2 — ELECTRICAL Current drain with 12 V DC: No sound output 240 mA ± 20 % Maximum volume with 24 keys from C1 to B2 pressed in Jazz organ tone 2050 mA ± 20 % Volume: maximum, Touch response: maximum Phone output level (Vrms with 8 Ω load each channel): with key E3 pressed in Jazz organ tone L-ch 60...

Page 4 - BLOCK DIAGRAM

— 3 — BLOCK DIAGRAM Buttons Keyboard FI0 ~ FI10 SI0 ~ SI10 KC0 ~ KC7 KI0 ~ KI2 MIDI IN OUT Working Storage RAM (64K-bit) LSI2 HY6264ALLJ-70 MA0 ~ MA12 MD0 ~ MD7 MD0 ~ MD15 MA1 ~ MA19 Sound Source ROM (8M-bit) LSI3 MX23C1610MC-12 CPU LSI4 GT913F BCK, SO, LRCK MA0, MA1 EA0 ~ EIO0 ~ EA14 EIO7 Effect RA...

Page 5 - CIRCUIT DESCRIPTION; KEY MATRIX

— 4 — CIRCUIT DESCRIPTION KEY MATRIX Note: Each key has two contacts, the first conatct (1) and second contact (2). Key Second contact (2) First contact (1) KC SI FI 0 C K 1 C K 2 C K 3 C K 4 C K 5 C K 6 C K 7 C K 0 I F ) 1 ( 0 A ) 1 ( 0 # A ) 1 ( 0 B ) 1 ( 1 C ) 1 ( 1 # C ) 1 ( 1 D ) 1 ( 1 # D ) 1 ...

Page 9 - FILTER BLOCK

— 8 — FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth thewaveforms. DAC (IC1: UPD6379GR) The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of themelody, chord, bass, and percussion for the right ...

Page 11 - MAJOR WAVEFORMS

— 11 — MAJOR WAVEFORMS 1 ADP (POWER) signalJE connector pin 5 2 NMI signalJE connector pin 7 3 KC0 signalJD connector pin 15 4 KC1 signalJD connector pin 14 5 CE (MCSBO) signalLSI3 pin 12 6 OE (MRDB) signalLSI3 pin 14 7 DAC output (L-ch)JE connector pin 12 8 DAC output (R-ch)JE connector pin13 9 Sou...

Page 12 - PRINTED CIRCUIT BOARDS

— 12 — PRINTED CIRCUIT BOARDS Main PCB JCM423-MA1M Sub PCBs JCM423-MA2M/MA3M/MA4M Bottom View Top View Top View 8 7 2 1 3 4 6 5 9 10

Page 13 - SCHEMATIC DIAGRAMS

— 13 — SCHEMATIC DIAGRAMS Main PCB JCM423-MA1M 1 2 8 7 6 5 3 4

Page 19 - EXPLODED VIEW

— 19 — EXPLODED VIEW 27 24 3 22 23 2 28 R-1 29 26 17 9 10 25 22 21 23 4 15 20 7 6 8 1 R-2 R-3 5 19 18 14 16 11 12 13 R-4

Page 21 - This parts list does not include the cosmetic parts, which; PARTS LIST

Notes: This parts list does not include the cosmetic parts, which p a r t s a r e m a r k e d w i t h i t e m N o . " R - X " i n t h e e x p l o d e dview.C o n t a c t o u r s p a r e p a r t s d e p a r t m e n t i f y o u n e e d t h e s eparts for refurbish. 1. Prices and specifications...