Instruction/ maintenance manual of the product GZ-500 Casio
Go to page of 26
GM SOUND KEYBOARD GZ-500 (with price) GZ-500.
— 2 — ELECTRICAL Current drain with 9 V DC: No sound output 294 mA ± 20% Maximum volume 940 mA ± 20% with 32 polyphonic notes in tone No. 078 Volume; maximum, Velocity: maximum Phone output level (Vrms with 8 load each channel): with key A5 pressed in tone No.
— 3 — OPERA TION SETTING UP THE KEYBOARD The initial settings Tone: 000 (Piano) Channel 1 - 9 & 11 - 16 dr0 (Drum set 0) Channel 10 Modulation: 0 (Off) MIDI control change Volume: 100 Pan: 64 .
— 4 — The initial settings in The General MIDI system Channel 1 - 9 & 11 - 16 Channel 10 Program change: 000 (Piano) Drum set No.: 0 Pitch bend: LSB: 40H, MSB: 00H Modulation: 0 (Off) Volume: .
— 5 — Octave shift setting and keyboard range Operation 2 The MIDI messages listed in the following table are transmitted when completing the setting operation. The setting affects only on the currently selected MIDI channel. First select the desire MIDI channel before changing settings.
— 6 — The initial settings of MIDI control change Pitch bend: +/- 0 (Center) Modulation: 0 (Off) Expression: 127 (Maximum) Sustain: 0 (Off) Sostenuto: 0 (Off) Soft: 0 (Off) Channel pressure: 0 (Of.
— 7 — Transmittable Messages Note No.: 12 ~ 72 (Oct. shift -2), 24 ~ 84 (Oct. shift -1) 36 ~ 96 (Oct. shift 0), 48 ~ 108 (Oct. shift 1) Velocity: 1 ~ 127 Note Off: velocity 0 Program Change: 0 ~ 1.
— 8 — BLOCK DIAGRAM KC0 ~ KC7 SI0 ~ SI7 FI0 ~ FI7 Key Controller LSI107 HG52E35P Working Storage RAM (64K-bit) LSI105 SRM2264LM90-B KO1 ~ KO3 LED driver IC371 BA612 LS0 ~ LS7 Buttons KI1 ~ KI5 Pow.
— 9 — Note: Each key has two contacts, the first conatct (1) and second contact (2). CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 C2 (1) C#2 (1) D2 (1) D.
— 10 — Name Voltage For operation of VDD +5 V CPU, Reset IC, Working storage RAM DVDD +5 V DSP, Key touch LSI, Sound source ROM, Effect RAM, KO siginal generator AVDD +5V DAC, Filter LVDD +4.
— 11 — CPU (LSI106: HD6433298A42F) 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.
— 12 — Pin No. Terminal In/Out Function 1 ~ 8 CD0 ~ CD7 In/Out Data bus 9, 10 CE1, TRSB Not used 11 GND7 In Ground (0V) source 12 CK16 Out Terminal for 24.576 MHz clock check point 13 VCC1 In +5V source 14 CK0 In Clock input. Connected to terminal CK16.
— 13 — Block diagram of DSP and DAC circuit Pin No. Terminal In/Out Function 106 EOEB Out Read enable signal output for the effect RAM 108 VCC7 In +5V source 111 ECEB Out Chip select signal output.
— 14 — CRDB CWRB CKI CCSB CD0 CD7 CA0 ~ CA2 First contact Second contact KC0 KC7 FI0 FI7 SI0 SI7 Key input signal Key scan signal ~ Data bus Address bus Key Controller LSI107 HG52E35P Keyboard FI SI KC RD WR APO A13 A14 CLOCK RESET RESB DAC (LSI104: UPD6376GS) The DAC receives 16-bit serial data output from the DSP.
— 15 — AVDD 1K 1K 1K C222(H) C103(H) AG AG 1K AG To main volume - + IC105 M5218APR 10V22 µ C333(H) Q107/108 2SC1740 18K 50V1 µ From the DAC 1K AG AVDD The following table shows the pin functions of LSI107. Pin No. Terminal In/Out Function 1 REQB Out Not used 2, 3, 60 ~ 63 FI8 ~ FI10, SI8 ~ SI10 In Not used.
— 16 — IC102 TC74HC174AF LG CPU LSI106 HD6433298A42F LVDD P40 P41 KP0 ~KP5 (KO0 ~ KO5) IC371 BA612 LED Driver Q104 ~Q111 LED Driver LS0 ~ LS7 La ~ Lg, Lp KO Signal Generator POWER AMPLIFIER (IC402: LA4598) The power amplifier is a two-channel amplifier with standby switch.
— 17 — MAJOR W A VEFORMS 1 2 CH1 CH2 A . 1 s CH1: CH2: 5 V 5 V 3 4 CH1 5 5 V CH2 A . 1 s 5 V CH1: CH2: 6 7 CH1 CH2 CH3 8 A 20 µ s 5 V CH1: 5 V CH2: 5 V CH3: 9 0 CH1 CH2 CH3 A A 10 ms 5 V CH1: 5 V CH2: 5 V CH3: B C CH1 CH2 CH3 D 5 V CH1: 5 V CH2: 5 V CH3: A 1 µ s E F CH1 CH2 CH1: 20 mV ~ CH2: 20 mV ~ A 1 ms G CH1 Note OFF Note ON CH1: 5 V A .
— 18 — SCHEMA TIC DIAGRAMS AMP./VOLUME PCBs JCM715-MA2M/MA3M.
— 19 — MAIN PCB JCM715-MA1M 6 7 8 17 16 15 14 12 13 1 2 5 3 4 9 10 11.
— 20 — CONSOLE PCBs JCM715-CN1M/2M/3M.
— 21 — KEYBOARD PCBs M616T-KY1M/KY2M.
— 22 — EXPLODED VIEW 12 14 13 9 10 11 6 3 7 11 1 15 17 16 19 18 20 2 20-1 20-2 24 4 23 22 8 5 21.
Notes: 1. Prices and specifications are subject to change with- out 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.
FOB Japan N Item Code No. Parts Name Specification Q N.R.Yen R Unit Price Main PCB N1 6923 6180 PCB ass'y M715-MA1M M140244*1 1 7,810 A N LSI101 2012 1498 LSI TC5316200CF-C117 1 980 A N LSI102 20.
FOB Japan N Item Code No. Parts Name Specification Q N.R.Yen R Unit Price 2301 0101 Diode 1S2473-T-77-T 58 8 C Bender VR102 2765 1141 Rotary volume RK1631110-50KB 1 190 B N 6 6923 6450 Bender knob M34.
MA0800751A.
An important point after buying a device Casio GZ-500 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Casio GZ-500 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Casio GZ-500 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Casio GZ-500 you will learn all the available features of the product, as well as information on its operation. The information that you get Casio GZ-500 will certainly help you make a decision on the purchase.
If you already are a holder of Casio GZ-500, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Casio GZ-500.
However, one of the most important roles played by the user manual is to help in solving problems with Casio GZ-500. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Casio GZ-500 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
