WK-1500 PITCH BEND WK-1500 GM SOUND KEYBOARD
CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MIDI: Built-in speakers: Input/Output Jacks Power supply: Headphones: Output jacks: Assignable Jack: MIDI terminals: Auto power off: Power source: Power consumption: Dimensions (HWD): Weight: 16-timbre multi-timbre receive (General MIDI Level 1) 12 cm diameter × 2 (output: 5 W + 5 W) 12 V DC Stereo standard jack Output impedance: 100 Ω Output voltage 2.
BLOCK DIAGRAM LED driver Q104 ~ Q111 MIDI OUT IN La ~ Lg, Lp LS0 ~ LS7 KO1 ~ KO3 P41 P40 KO Signal KO0 ~ Generator IC102 KO5 TC74HC174AF CPU LSI14 HD6433294A19F Keyboard LED driver IC371 BA612 7-seg.
CIRCUIT DESCRIPTION KEY MATRIX KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 E1 (1) F1 (1) F#1 (1) G1 (1) G#1 (1) A1 (1) A#1 (1) SI0 E1 (2) F1 (2) F#1 (2) G1 (2) G#1 (2) A1 (2) A#1 (2) FI1 B1 (1) C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) SI1 B1 (2) C2 (2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2) FI2 G2 (1) G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1) SI2 G2 (2) G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2) FI3 D#3 (1) E3 (1) F3
NOMENCLATURE OF KEYS F#1 G#1 A#1 C#2 D#2 F#2 G#2 A#2 C#3 D#3 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 C#6 D#6 F#6 G#6 A#6 C#7 D#7 F#7 E1 F1 G1 A1 B1 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D6 E6 F6 G6 A6 B6 C7 D7 E7 F7 G7 BUTTON MATRIX KI1 KI2 KI3 KI4 KI5 KI6 KO0 SPLIT LAYER CH7/CHORD2 CH8/ CHORD3 CH9/BASS CH10/ RHYTHM KO1 TRANSPOSE /TUNE MAGICAL PRESET MIDI RHYTHM TONE PAD CH3/ LOWER1 KO2 CH4/LOWER2 CH5/PAD CH6/
CPU (LSI14: HD6433294A19F) The 16-bit CPU contains a 32k-bit ROM, a 1k-bit RAM, seven 8-bit I/O ports, an A/D convertor and MIDIl interfaces. The CPU accesses to the working storage RAM, the DSP and the key touch LSI. The CPU interprets MIDI message using the working storage RAM. The CPU also controls buttons and LEDs. The following table shows the pin functions of LSI14. Pin No.
Pin No. Terminal In/Out 1~8 9, 10 CD0 ~ CD7 CE1, TRSB In/Out — Function Data bus Not used 11 GND7 In 12 CK16 Out Terminal for 24.576 MHz clock check point 13 14 VCC6 CK0 In In +5 V source Clock input. Connected to terminal CK16. 15 TCKB — Not used 16 17 VCC1 GND1 In In +5 V source Ground (0 V) source 18, 19 XT0, XT1 In/Out 20 21 SGL CCSB In In System control terminal.
Pin No. 106 Terminal EOEB In/Out Out 108 111 VCC7 ECEB In Out 113 ~ 117 118 119 ED11 ~ ED15 VCC4 GND4 — In In 120 ~ 122 123 ~ 130 131 ED8 ~ ED10 ED0 ~ ED7 GND6 — In/Out In 132 ~ 134 135, 136 — — — — Function Read enable signal output for the effect RAM +5 V source Chip select signal output for the effect RAM Not used +5 V source Ground (0 V) source Not used Data bus for the effect RAM Ground (0 V) source Not used. Connected to ground.
DAC (IC11: UPD6376GS) The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog waveforms by each channel and output them separately. The following table shows the pin functions of IC11. Pin No. Terminal In/Out Function 1 SEL In Mode selection terminal. Connected to ground. 2 D.
The following table shows the pin functions of LSI16. Pin No. Terminal In/Out 1 REQB Out 2, 3, 60 ~ 63 FI8 ~ FI10, SI8 ~ SI10 Function Not used. In Not used. Connected to +5 V. 4 VCC In +5 V source 5 CRDB In Read enable signal input 6 CWRB In Write enable signal input 7 CCSB In Chip select signal input 8, 9, 11 T, STBY, W In Not used. Connected to +5 V. 10 RESB In Reset signal input 12 CKI In 10 MHz clock input 13, 14 TMD, TST In Not used. Connected to ground.
POWER AMPLIFIER (IC201: LA4620) The power amplifier is a two-channel amplifier with standby switch. 19 Boot11 20 OUT11 21 PoGND1 22 OUT12 23 Boot12 1 VCC1 18 Boot21 17 OUT21 15 PoGND2 14 OUT22 12 Boot22 + IN11+ 3 IN11– 5 – IN12– 4 – + Input Amp. Pre-drive Amp. RL Short Protector Input Amp. Pre-drive Amp. Terminal Protection Circuit PriGND 6 IN21+ 9 + IN21– 7 – IN22– 8 – + Power Amp. Input Amp. Power Amp.
MAJOR WAVEFORMS A.1s A 1 µs A .
PRINTED CIRCUIT BOARDS 4 MAIN PCB JCM717-MA1M C142 C12 C35 C34 R26 C151 C11 C76 C16 C15 C25 C27 C28 C31 C32 C33 R110 R109 R108 R107 R106 R105 R104 R103 R102 R101 R100 R99 R98 R97 R83 R82 EF2 R69 FB51 C152 C147 C74 C153 R81 R80 R79 R78 C71 FB52 C73 R68 C87 MR17 MR16 Q14 LSI14 FB54 C84 C85 IC12 C37 Q13 D11 C94 C133 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 R71 C47 C46 C45 C44 C43 C42 C41 C40 C39 C38 C49 C48 C50 C51 FB55 R75 R93 R92 D12 R160 R94 C102 C1
SCHEMATIC DIAGRAMS MAIN PCB JCM717-MA1M 14 13 12 4 1 5 3 6 2 9 11 10 — 15 — 7 8
SUB PCB KDM717-MA2M 15 16 — 16 —
CONSOLE PCBs KDM717-CN1M/CN2/CN3/CN4 — 17 —
KEYBOARD PCBs JCM762T-KY1M/KY2M/KY3 — 18 —
EXPLODED VIEW 31 30 19 29 26 R-1 24 26 21 26 22 6 28 20 23 18 4 27 25 26 3 26 17 4 8 7 31 16 4 12 — 19 — 10 9 R-2 1 11 2 15 13 5 14 32 R-3
PARTS LIST WK-1500 Notes: 1. Prices and specifications are subject to change without prior notice. 2. As for spare parts order and supply, refer to the "GUIDEBOOK for Spare parts Supply", published seperately. 3. The numbers in item column correspond to the same numbers in drawing.
Item Code No.
Item 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Code No.
MA0900761A Sep, 1996
