Casio CTK-450 User Manual

(with price)CTK-450ELECTRONIC KEYBOARDRCTK-450

— 8 —Power Supply CircuitThe power supply circuit generates three voltages - VDD (+6.0V) for the CPU and the reset IC, AVDD(+6.0V) for the analog cir

— 9 —SCHEMATIC DIAGRAMSM6110K-KY1M, KY2M

— 10 —PCB VIEW AND MAJOR WAVEFORMS879651011213 4

— 11 —M5508-MA1M2.95.22.32.25.21.55.25.73.23.23.23.23.23.20.0+0.5- 2.70.00.90.05.75.70.05.83.23.10.10.10.10.10.10.10.10.10.60.60.60.60.60.60.6 5.45.4

— 12 —EXPLODED VIEW

— 9 —IC AND TRANSISTOR LEAD IDENTIFICATIONSLA4598M5218APRS-8053ANO2SA854SR2SC1740SQ2SD1468SR2SC3112B2SD2008Q,RECBEBCPower GNDch1 B.S.ch1 OUTVCCch1 N.F

PARTS LISTCTK-450Notes: 1. Prices and specifications are subject to change with-out prior notice.2. As for spare parts order and supply, refer to the&

FOB JapanN Item Code No. Parts Name Specification Q M N.R.Yen R * Unit PricePCB Ass'y M5508-MA1M2011 6979 LSI MSM6567-15GS-K-

FOB JapanN Item Code No. Parts Name Specification Q M N.R.Yen R * Unit Price2819 0395 Ceramic capacitor RT-HE40TKSL100F-T 2 20 6 C A2830 6436 My

MA0200941A

CONTENTSSPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1DISASSEMBLE INSTRUCTIONS . . . . . . .

— 1 —GeneralNumber of Keys: 61Polyphonic: 16-notePreset Tones: 64Auto-Rhythms: 64Auto-Accompaniment: CASIO Chord/FingeredAuto-Play Tunes: Songs: 32 (

— 2 —DISASSEMBLE INSTRUCTIONSNote: The keyboard PCBs are fixed to the case by springy clicks instead of by screws.To disassemble keyboard PCBs1. Using

— 3 —KO0~KO14KI0~KI7KeyboardSwitchesOscillator Power Supply CircuitAVDD +5VVCC +9VSpeakerOutput JackFilterT4/T5CPUMSM6567-15T1/T2/T3AmplifierLA459

— 4 —0IK1IK2IK3IK4IK5IK6IK7IK0OKrewoPFFO2C2#C2D2#D2E2F1OK yalP2#F2G2#G2A2#A2B2OK deregniF3C3#C3D3#D3E3F3OKOISACdrohC3#F3G3#G3A3#A3B4OK gnoS4C4#C4D4#D4

— 5 —Pin No. Terminal In/Out Function1 LEDY0 Out Not used.2 LVDD1 In +5V source3 LGND2 In Ground (0V) source4 ~ 9 LEDX0 ~ LEDX5 Out Not us

— 6 —Filter BlockSince the sound signal from the CPU is a stepped waveform, the filter block is added to smooth thewaveform.Mute CircuitThe mute circu

— 7 —Power Amplifier (LA4598)LA4598 is a 2-channel power amplifier with stand-by switch.The following table shows the pin functiion of the power ampli