(with price) CTK-530 ELECTRONIC KEYBOARD
CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Major waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PCB View and Check Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Schematic Diagrams . . .
Headphone output level (Vrms with 8 Ω load each channel): with key C3 pressed in Pan Flute tone Output level (Vrms with 47 kΩ load each channel): with key C2 pressed in Pan Flute tone Speaker output level (Vrms with 4 Ω load each channel): with key A1 pressed in Pan Flute tone Minimum operating voltage: 210 mV ± 20% 2000 mV ± 20% 2150 mV ± 20% 6.3 V BLOCK DIAGRAM LED Latch IC107 HD74HC373P LED driver Q111 ~ Q118 La ~ Lg, Lp LEDs / 7Seg.
CIRCUIT DESCRIPTION KEY MATRIX KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1) SI0 C2 (2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2) G2 (2) FI1 G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1) D#3 (1) SI1 G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2) D#3 (2) FI2 E3 (1) F3 (1) F#3 (1) G3 (1) G#3 (1) A3 (1) A#3 (1) B3 (1) SI2 E3 (2) F3 (2) F#3 (2) G3 (2) G#3 (2) A3 (2) A#3 (2) B3 (2) FI3 C4
NOMENCLATURE OF KEYS C#2 D#2 C2 D2 E2 F#2 G#2 A#2 F2 G2 A2 C#3 D#3 B2 C3 D3 E3 F#3 G#3 A#3 F3 G3 A3 F#4 G#4 A#4 C#4 D#4 B3 C4 D4 E4 F4 G4 A4 C#5 D#5 B4 C5 D5 E5 F#5 G#5 A#5 F5 G5 A5 B5 C#6 D#6 C6 D6 E6 F#6 G#6 A#6 F6 G6 A6 B6 C7 RESET CIRCUIT When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal circuit.
The following table shows the pin functions of LSI101. Pin No. 1 Terminal TXD0 In/Out Out 2 3 4~6 RXD0 SCK0 In Out 7 8, 9 AVCC AN0, AN1 In 10 11 12 AGND BCK SO In Out Out 13 14 15, 16 17 LRCK GND XLT0, XLT1 VCC Out In In/Out In 18, 19 20 21 22 MD0, MD1 RSTB NMI INT FI0 ~ FI3 SI0 ~ SI3 KC0 ~ KC7 FI4 ~ FI7 SI4 ~ SI7 In In In Mode selection terminal. Connected to ground. Reset signal input Power ON signal input Not used. Connected to ground.
FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. Filter Block To power amplifier From DAC POWER AMPLIFIER (IC102: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC102. Pin No. 1 2 3 4 5 6 7 8 9 Terminal Power GND Ch1 B.S. Ch1 OUT VCC Ch1 N.F. Ch1 IN D.C.
LED DRIVING LVDD Q111 ~Q118 LED Driver LED Latch IC107 HD74HC373AP La ~ Lg, Lp MD0 ~ MD7 CPU PLE IC106 BA612 LED Driver UPD912GF-3BA LED Latch IC105 HD74HC75AP LO0 ~LO3 LSI101 LG —8— MD8 ~ MD11
MAJOR WAVEFORMS 50 µs 0.1 s 1 CH1 4 A A 1 ms 1 ms CH1 5 C CH1 E CH1 D CH2 F CH2 CH2 CH2 2 3 CH3 CH1: 5 V CH2: 5 V 6 CH3: 5 V CH3 CH1: 5 V CH2: 5 V ~ ~ CH1: 0.2 V CH2: 0.2 V ~ ~ CH1: 0.2 V CH2: 0.2 V CH3: 5 V 1 POWER ON signal UPD912GF-3BA pin 21 4 Key scan signal KC0 UPD912GF-3BA pin 31 C DAC output (R-ch) UPD6379GR pin 5 E Amp. input (R-ch) LA4598 pin 6 2 APO signal UPD912GF-3BA pin 3 5 Key scan signal KC1 UPD912GF-3BA pin 32 D DAC output (L-ch) UPD6379GR pin 8 F Amp.
PCB VIEW AND CHECK POINTS — 10 —
SCHEMATIC DIAGRAMS JCM460-MA1M 5.1 4.5 0.0 5.1 3 13 10 11 12 15 2 8.3 5.1 7.6 5.7 7 8 14 9 16 5.1 2.3 0.0 0.7 8.2 7.5 1.7 1 2.3 5.1 1.7 4 5.1 7.5 5.7 5.1 5.
JCM617T-KY1M/KY2M — 12 —
EXPLODED VIEW 11 10 2 9 5 1 3 12 6 4 7 9 13 14 8 15 16 17 17-2 18 19 17-1 20 21 23 22 — 13 —
PARTS LIST CTK-530 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.
N Item N N N 8 LSI101 LSI102 IC101 IC102 IC103 IC104 IC105 IC106 IC107 Q101, Q103 Q102, Q104, Q105, Q107~Q109 Q106, Q119 Q110 Q111~Q118 X101 D101 D102 D103, D107, D108, D110~D136 D104, D105 D106 D109 LED101~ LED107 LED108 J101 J102 J103 L107 MC101~ MC103 N N N N Code No.
N N N Item 14 15 16 17 17-1 17-2 18 19 22 23 Notes: Code No.
Description of Resistors A general description of resistors is shown in the following table. The description consists of Type, Value, Rated Wattage and Tolerance. When you need a resistor, please find a substitution in your country by yourselves referring to the description. Note: All resistors are carbon film, 1/5 watt, +/-5% otherwise specified. Ref.
MA0700951A
