(with price)
GZ-500
GZ-500
GM SOUND KEYBOARD
CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Major waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SPECIFICATIONS
GENERAL
Number of keys:
Polyphonic:
Preset tones:
Keyboard controls:
Digital effects:
Modulation:
Pitch bend wheel:
Tuning control:
Built-in speakers:
Terminals:
Auto power off:
Power source:
Power consumption:
Dimensions (HWD):
Weight:
61
32-note
128, Drum set: 8
Touch response: On/Off
10, including Reverb-1, Reverb-2, Reverb-3, Chorus, Tremolo,
Phase Shifter, Organ SP, Enhancer, Flanger, EQ Loudness
On/Off, Depth setting range: 0 - 127
Bend sense: 0 - 12
440Hz ± 50 cents
12 cm dia. 2 W input rating: 2 pcs.
Phone Jack [Output impedance: 100 Ω, Output voltage: 4.5 V(rms) MAX],
MIDI Jacks (IN, OUT), Assignable Jack, AC Adapter Jack (9 V)
Approximately 6 minutes after the last operation
2-way AC or DC source
AC: AC adapter
DC: 6 D size dry batteries
7.7 W
129 x 942 x 367 mm (5-1/16 x 37-1/16 x 14-1/2 inches)
5.3 kg (11.7 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output
Maximum volume
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. 078
Line output level (Vrms with 47 k load each channel):
with key A5 pressed in tone No. 078
Minimum operating voltage:
—2—
294 mA ± 20%
940 mA ± 20%
100 mV ± 20%
1350 mV ± 20%
6.0 V
OPERATION
SETTING UP THE KEYBOARD
Item
Setting
Setting operation
System Reset
1*
1. Press the control button and repeat it until the display
shows "Srt".
"SUr" and "Srt" will appear alternately on the display.
2. Press the + key.
Assignable Jack
Sustain pedal
1. Press the control button and repeat it until the display
shows "JAC".
2. Using the +/- key, select "SUS" on the dispaly.
Sostenuto pedal
1. Press the control button and repeat it until the display
shows "JAC".
2. Using the +/- key, select "SoS" on the dispaly.
Soft pedal
1. Press the control button and repeat it until the display
shows "JAC".
2. Using the +/- key, select "SFt" on the dispaly.
2*
1. Press the MIDI button and repeat it until the display shows
"Grt".
"SUr" and "Grt" will appear alternately on the display.
2. Press the + key.
3. Press the + key again.
GM Reset
3*
Notes: 1* See the initial settings list as shown below.
2* See the initial settings in The General MIDI system on next page.
3* The exclusive message of "GM system on" will be tramsmitted when completing the operation.
System exclusive: GM system on
[F0][7E][7F][09][01][F7]
The initial settings
Tone:
Modulation:
MIDI control change
Volume:
Pan:
Expression:
Effect depth:
Pitch bend sense:
Coarse tune:
Fine tuning:
Digital effect:
MIDI channel:
Channel On/Off:
Octave shift:
Modulation depth:
Touch response:
Velocity at touch
response OFF:
Assignable jack:
Local control On/Off:
000 (Piano)
dr0 (Drum set 0)
0 (Off)
Channel 1 - 9 & 11 - 16
Channel 10
100
64 (Center)
127 (Maximum)
127 (Maximum)
2
0 (Center)
0 (Center)
E-0 (Digital effect 0)
01
On
0
064
r-0 (Touch curve 0)
100
SUS (Sustain pedal)
On
—3—
The initial settings in The General MIDI system
Channel 1 - 9 & 11 - 16
Program change:
Pitch bend:
Modulation:
Volume:
Pan:
Expression:
Sustain:
Soft:
Effect depth:
Pitch bend sense:
Coarse tune:
Fine tune:
RPN:
Channel pressure:
000 (Piano)
LSB: 40H, MSB: 00H
0 (Off)
100
64 (Center)
127 (Maximum)
0 (Off)
0 (Off)
127 (Maximum)
02 (2 seminotes)
LSB:40H, MSB:00H
LSB:40H, MSB:00H
Null
0 (Off)
Channel 10
Drum set No.:
0
Volume:
Pan:
Expression:
100
64 (Center)
127 (Maximum)
Soft:
Effect depth:
0 (Off)
127 (Maximum)
TRANSMITTING MIDI MESSAGES
Operation 1
MIDI messages of note on/off, velocity and modulation are transmitted no matter which MIDI channel is
selected.
Note on/off message is transmitted when the corresponding key is pressed/released.
Use the Octave Shift Button, shift the octave range up or down so that GZ-500 is able to send note
numbers 17 to 108 but the keyboard has 61 keys only.
Velocity is also transmitted when a key is pressed. GZ-500 sends the velocity in accordance with the
strength of the pressed key and the selected touch curve (sensitivity).
Data of modulation is transmitted when the corresponding wheel is operated.
MIDI Message
Setting
Setting operation
Note On/Off
Octave shift
1. Press the octave shift button.
2. Using the +/- key, select an octave range -2 to 1 you want.
Velocity
Velocity curve
1. Press the control button and repeat it until the display
shows "tCH".
2. Using the 10-key, enter a number from 0 to 7.
Touch response OFF
1. Press the control button and repeat it until the display
shows "tCH".
2. Using the 10-key, enter a number 0.
3. Press the - key. The display will show "oFF".
Velocity at touch
response OFF
1. Press the control button and repeat it until the display
shows "tCH".
2. Using the 10-key, enter a 3-digit number from 001 to 127.
Modulation depth
1. Press the control button and repeat it until the display
shows "dEP".
2. Using the 10-key, enter a 3-digit number from 001 to 127.
Modulation
—4—
Octave shift setting and keyboard range
1
0
-1
-2
C4 (60)
Octave range when set to -2
Octave range when set to -1
Octave range when set to 0
Octave range when set to 1
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.
Selecting a MIDI channel
1. Press the MIDI button.
The display shows the current MIDI channel, eg. "C01" means Channel 1.
2. Using the 10-key, enter a number from 1 to 16.
Changing Program Change / Control Change
MIDI Message
Program change
Control change
Setting Operation
1. Reffering to the tone number list on the panel, find the 3-digit tone
number you desire.
2. Press the tone button.
3. Using the 10-key, enter the 3-digit number.
Volume 1. Press the MIDI button and repeat it until "voL" appears on the display.
2. Using the 10-key, enter a 3-digit number from 000 to 127.
Pan 1. Press the MIDI button and repeat it until "PAn" appears on the display.
2. Using the 10-key, enter a 3-digit number from 000 to 127.
Expression 1. Press the MIDI button and repeat it until "EPS" appears on the display.
2. Using the 10-key, enter a 3-digit number from 000 to 127.
Effect depth 1. Press the MIDI button and repeat it until "EFt" appears on the display.
2. Using the 10-key, enter a 3-digit number from 000 to 127.
Fine tune 1. Press the MIDI button and repeat it until "tUn" appears on the display.
2. Using the 10-key and the - key, enter a 2-digit number from -50 to 50.
Transpose 1. Press the MIDI button and repeat it until "trn" appears on the display.
2. Using the 10-key and the - key, enter a 2-digit number from -12 to 12.
All notes off 1. Press the MIDI button and repeat it until "Ano" appears on the display.
"SUr" and "Ano" will appear alternately on the display.
2. Press the + key.
3. Press the + key again to transmit the message.
All sounds off 1. Press the MIDI button and repeat it until "ASo" appears on the display.
"SUr" and "ASo" will appear alternately on the display.
2. Press the + key.
3. Press the + key again to transmit the message.
Reset all controllers 1. Press the MIDI button and repeat it until "rAC" appears on the display.
"SUr" and "rAC" will appear alternately on the display.
2. Press the + key.
3. Press the + key again to transmit the message.
—5—
The initial settings of MIDI control change
Pitch bend:
Modulation:
Expression:
Sustain:
Sostenuto:
Soft:
Channel pressure:
RPN:
+/- 0 (Center)
0 (Off)
127 (Maximum)
0 (Off)
0 (Off)
0 (Off)
0 (Off)
null
Operation 3
Messages of Digital Effect Type, which are system exclusive messages, are transmitted when completing
the following operation.
Transmitting a digital effect type
1. Press the tone button.
2. Press the digital effect button once when the digital effect indicator is off.
Press the digital effect button twice when the digital effect indicator is lighting up.
3. Using the 10-key, enter a number from 0 to 9.
4. The display shows the degital efffect type entered, eg. "E_3" means digital effect 3 (Chorus)
5. Wait for about a few seconds unitl the display show the tone number at Step 1.
System exclusive: Effect change
[F0][44][0B][09][xx][F7]
[xx]: [00] - [09], [0F]
[00]: Reverb1 (Stage)
[01]: Reverb2 (Hall)
[02]: Reverb3 (Room)
[03]: Chorus
[04]: Tremolo
[05]: Phase shifter
[06]: Organ speaker
[07]: Enhance
[08]: Flanger
[09]: EQ Loundness
[0F]: Effect OFF
RECEIVING MIDI MESSAGES
The MIDI monitor blinks during receiving a MIDI message.
To recognize Note On/Off messages, set a MIDI channel on.
Setting on/off of a MIDI channel
1. Press the MIDI channel button.
2. Press the channel on/off button.
The LED lights when the MIDI channel is on.
The LED goes out when the MIDI channel is off.
Active sensing
This message checks if the MIDI cable is disconnected.
Once GZ-500 has received this message, it always counts time of an interval to a next MIDI message.
In case when GZ-5 receives no MIDI message for 420 msec of time, it will stop sound output and reset all
controllers, then it will cancel the function of active sensing.
—6—
Transmittable Messages
Note No.:
Velocity:
Note Off:
Program Change:
Pitch Bend:
Control Change:
Exclusive:
12 ~ 72 (Oct. shift -2), 24 ~ 84 (Oct. shift -1)
36 ~ 96 (Oct. shift 0), 48 ~ 108 (Oct. shift 1)
1 ~ 127
velocity 0
0 ~ 127 (Channels 1 - 9 & 11 - 16), 0 ~ 7 (Channel 10)
00H / 00H ~ 7FH / 7FH
Modulation
0 ~ 127
Volume
0 ~ 127
Pan
0 ~ 127
Expression
0 ~ 127
Sustain
0: Off, 127: On
Sosutenuto
0: Off, 127: On
Soft
0: Off, 127: On
Effect Depth
0 ~ 127
Pitch Bend Sense 00H / --H ~ 0CH / --H (12 seminotes)
Coarse Tune
34H / --H ~ 40H / --H ~ 4CH / --H
(-12 seminotes) ~ (center) ~ (+12 seminotes)
Fine Tune
20H / 00H ~ 40H / 00H ~ 60H / 00H
(-50 cents) ~ (center) ~ (+50 cents)
All Notes Off
All Sounds Off
Reset All Controllers
Effect Change
General MIDI On
Receivable Messages
Note No.:
Velocity:
Note Off:
Program Change:
Pitch Bend:
Control Change:
Channel Pressure:
Exclusive:
0 ~ 127
1 ~ 127
velocity 0
0 ~ 127(Channels 1 - 9 & 11 - 16), 0 ~ 7 (Channel 10)
00H / 00H ~ 7FH / 7FH
Modulation
0 (0 cent) ~ 127 (+/-50 cents)
Volume
0 ~ 127
Pan
0 (Left) ~ 64 (Center) ~ 127 (Right)
Expression
0 ~ 127
Sustain
0 ~ 63: Off, 64 ~ 127: On
Sosutenuto
0 ~ 63: Off, 64 ~ 127: On
Soft
0 ~ 63: Off, 64 ~ 127: On
Effect Depth
0 ~ 127
Pitch Bend Sense 00H / --H ~ 0CH / --H (12 seminotes)
Coarse Tune
34H / 00H ~ 40H / 00H ~ 4CH / 00H
(-12 seminotes) ~ (center) ~ (+12 seminotes)
Fine Tune
20H / 00H ~ 40H / 00H ~ 60H / 00H
(-50 cents) ~ (Center) ~ (+50 cents)
RPN Null
All Notes Off
All Sounds Off
Reset All Controllers
0 (0 cent) ~ 127 (+/-50 cents)
Effect Change
General MIDI On
Active Sensing
—7—
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
LSI106
HD6433298A42F
Keyboard
LED driver
IC371
BA612
7-seg. LED
LEDs
KI1 ~ KI5
Buttons
Power Switch
POWER
FI0 ~ FI7
SI0 ~ SI7
KC0 ~
KC7
RESET
Reset IC
IC5
RH5VL36AA
A0 ~
A14
D0~D7
Key Controller
LSI107
HG52E35P
Working Storage RAM
(64K-bit)
LSI105
SRM2264LM90-B
A0 ~ A14
A0 ~ A2
A0 ~ A3
Effect RAM
(256K-bit)
LSI103
LC33832M-70
EA0 ~ EA14
RA0 ~ RA19
DSP
LSI102
HG51B115FD
ED0 ~ ED7
RD0 ~ RD15
WCK1
SLOP
Sound Source ROM
(16M-bit)
LSI101
TC5316200CF-C112
BCK
D/A Converter
LSI104
UPD6376GS
VC
Output
Speakers
Filter
IC101
Filter
IC101
Main
Volume
Power Amplifier
IC402
LA4598
—8—
LVDD
VCC
AVDD
DVDD
VDD
Power Supply Circuit
IC401, Q401 ~ Q405
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 (1)
C#4 (1)
D4 (1)
D#4 (1)
E4 (1)
F4 (1)
F#4 (1)
G4 (1)
SI3
C4 (2)
C#4 (2)
D4 (2)
D#4 (2)
E4 (2)
F4 (2)
F#4 (2)
G4 (2)
FI4
G#4 (1)
A4 (1)
A#4 (1)
B4 (1)
C5 (1)
C#5 (1)
D5 (1)
D#5 (1)
SI4
G#4 (2)
A4 (2)
A#4 (2)
B4 (2)
C5 (2)
C#5 (2)
D5 (2)
D#5 (2)
FI5
E5 (1)
F5 (1)
F#5 (1)
G5 (1)
G#5 (1)
A5 (1)
A#5 (1)
B5 (1)
SI5
E5 (2)
F5 (2)
F#5 (2)
G5 (2)
G#5 (2)
A5 (2)
A#5 (2)
B5 (2)
FI6
C6 (1)
C#6 (1)
D6 (1)
D#6 (1)
E6 (1)
F6 (1)
F#6 (1)
G6 (1)
SI6
C6 (2)
C#6 (2)
D6 (2)
D#6 (2)
E6 (2)
F6 (2)
F#6 (2)
G6 (2)
FI7
G#6 (1)
A6 (1)
A#6 (1)
B6 (1)
C7 (1)
SI7
G#6 (2)
A6 (2)
A#6 (2)
B6 (2)
C7 (2)
Note: Each key has two contacts, the first conatct (1) and second contact (2).
Key
FI
First contact (1)
Second contact (2)
KC
SI
NOMENCLATURE OF KEYS
C#2 D#2
C2
D2
E2
F#2 G#2 A#2
F2
G2
A2
B2
C#3 D#3
C3
D3
E3
F#3 G#3 A#3
F3
G3
A3
B3
C#4 D#4
C4
D4
E4
F#4 G#4 A#4
F4
G4
—9—
A4
B4
C#5 D#5
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
BUTTON MATRIX
KI1
KI2
KI3
KI4
KO0
3
0
2
1
KO1
Control
Demo
Effect
MIDI
KO2
+
9
7
8
KO3
6
-
5
4
KO4
Tone
MIDI
Channel
Channel
On/Off
Octave
Shift
KI5
Modulation
POWER SUPPLY CIRCUIT
The power supply circuit generates six voltages as shown in the following table. VDD voltage is always
generated. The others are controlled by APO signal output from the CPU.
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
+4.5 V
LED Driver
VCC
+9 V
Power amplifier, Pilot lamp
VC
+9 V
Power amplifier
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 and clears the working storage RAM.
When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU provides
APO signal to the power supply circuit and raises RESET signal to +5V to reset the DSP, the key controller and the KO signal generator.
VDD
Battery set
DVDD
VDD
KO Signal Generator
IC102
TC74HC174AF
RESET
Reset IC
IC105
RH5VL36AA
CPU
LSI106
HD6433298A42F
VDD
To power supply circuit
-NMI
P42
DSP
LSI102
HG51B155FD
-RESET
POWER
From power switch
APO
DVDD
Working Strage RAM
LSI105
SRM2264LM90
— 10 —
DVDD
Key Controller
LSI107
HG52E35P
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. The CPU also controls buttons and LEDs.
The following table shows the pin functions of LSI106.
Pin No.
Terminal
In/Out
1
2
3
P50/TXD
P51/RXD
P52/SCK
Out
In
Out
4
5
-RESET
-NMI
In
In
Reset signal input
Power ON trigger signal input
6
7
8
9, 10
VCC
-STBY
VSS
XTAL, EXTAL
In
In
In
In
+5V source
Standby signal input. Connected to +5V.
Ground (0V) source
20MHz clock input
11, 12
13
MD1, MD0
AVSS
In
In
Mode selection input
Ground (0V) source
14
15
16
17 ~ 21
22
23 ~ 30
31
32
33 ~ 48
40
49 ~ 56
57
58
59
60
61
62
63
64
P70
P71
P72
P73 ~ P77
AVCC
P60 ~ P67
VCC
P27
A0 ~ A14
VSS
D0 ~ D7
P40
P41
P42
P43
P44
P45
P46
P47
In
In
Analog input terminal for the pitch bend wheel
APO cancellation signal input
Not used. Connected to +5 V source.
LED drive signal output
+5V source
LED drive signal output
+5V source
Not used
Address bus
Ground (0V) source
Data bus
Clock for KO signal generator
KO signal data
APO signal output
Read enable signal output
Write enable signal output
Not used
10 MHz clock output
Not used. Connected to +5 V source.
Out
In
Out
In
Out
In
In/Out
Out
Out
Out
Out
In
Out
Function
MIDI signal output
MIDI signal input
Reset signal output
DIGITAL SIGNAL PROCESSOR (LSI102: HG51B155FD)
Upon receipt of note numbers and their velocities, the DSP reads sound and velocity data from the sound
source ROM in accordance with the selected tone; the DSP can read rhythm data simultaneously when a
rythm pattern is selected. Then it provides 16-bit serial signal containing data of the melody, chord, bass,
and percussion to the DAC. When an effect selected, the DSP adds the effect to the sound data using a
256k-bit RAM.
The following table shows the pin functions of LSI102.
— 11 —
Pin No.
1~8
Terminal
CD0 ~ CD7
9, 10
11
12
13
CE1, TRSB
GND7
CK16
VCC1
14
15
16
17
CK0
TCKB
VCC1
GND1
In
In
18, 19
20
21
22 ~ 25
XT0, XT1
SGL
CCSB
CA0 ~ CA3
In/Out
In
In
In
26
27
28
CE0
CWRB
CRDB
In
In
In
Not used. Connected to ground.
Write enable signal
Read enable signal
29 ~ 32
33
34
35 ~ 39
RESB
TESB
In
In
Not used
Reset signal input
Not used. Connected to +5V.
Not used
RD0 ~ RD15
In
Data bus for the sound source ROM
VCC2
GND2
RA23
RA22
RA20, RA21
In
In
Out
Out
Out
+5V source
Ground (0V) source
Not used
Chip select signal for the sound source ROM
Not used
RA0 ~ RA19
Out
Address bus for the sound source ROM
GND5
WOK2
In
Out
Ground (0V) source
Not used
84
85
86
87
88
89
90 ~ 92
VCC3
GND3
WOK1
SOLM
SOLP
BOK
In
In
Out
Out
Out
Out
+5V source
Ground (0V) source
Word clock for the DAC
Not used
Serial sound data output
Bit clock output
Not used
93
94, 95
97 ~ 105
107,109
110, 112
VCC5
In
EA0 ~ EA12
Out
Address bus for the effect RAM
EWEB
Out
Write enable signal for the effect RAM
40 ~ 49
52 ~ 57
50
51
58
59
60, 61
62 ~ 73
75 ~ 82
74
83
96
In/Out
In/Out
In
Out
In
In
Function
Data bus
Not used
Ground (0V) source
Terminal for 24.576 MHz clock check point
+5V source
Clock input. Connected to terminal CK16.
Not used
+5V source
Ground (0V) source
24.576 MHz clock input/output
System control terminal. Single chip system: Open
Chip select signal input
Address bus
+5V source
— 12 —
Pin No.
106
108
111
113 ~ 117
118
119
120 ~ 122
123 ~ 130
131
132 ~ 134
135, 136
Terminal
EOEB
VCC7
ECEB
ED11 ~ ED15
VCC4
GND4
ED8 ~ ED10
ED0 ~ ED7
GND5
In/Out
Out
In
Out
Function
Read enable signal output for the effect RAM
+5V source
Chip select signal output for the effect RAM
Not used
+5V source
Ground (0V) source
used
Not sued
Data bus for the effect RAM
Ground (0V) source
Not used. Connected to ground.
Not used
In
In
In/Out
In
Block diagram of DSP and DAC circuit
Sound Source ROM
LSI101
TC5316200CF-C112
CE
RA22
A0 ~ A19
D0 ~ D15
RA0 ~
RA19
RD0 ~
RD15
D0 ~ D7
SOLP
DSP
A0 ~ A3
A12
A14
RD
APO
WR
RESET
SOLP: Sound data
BOK: Bit clock
WOK1: Word clock
CCSB
LSI102
CRDB
HG51B155FD
SI
DAC
LSI104
BOK
CLK
WOK1
LRCK
UPD6376GS
CWRB
RESB
PG
X101
ECEB EOEB EWEB
CS OE WE
ED0 ~
ED15
EA0 ~
EA14
D0 ~ D15
A0 ~ A14
Effect RAM (256K-bit)
LSI103
LC33832M-70
— 13 —
24.576 MHz
ROUT
LOUT
DAC (LSI104: 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 LSI1.
Pin No.
1
2
3
4
5
6
7, 8
9
10
11
12
13
14
15
16
Terminal
SEL
D.GND
NC
DVDD
A.GND
R.OUT
A.VDD
R.REF
L.REF
L.OUT
A.GND
LRCK
LRSEL
SI
CLK
In/Out
In
In
In
In
Out
In
In
In
Out
In
In
In
In
In
Function
Mode selection terminal. Connected to ground.
Ground (0V) source for the internal digital circuit
Not used.
+5V source for the internal digital circuit
Ground (0V) source for the right channel
Right channel sound waveform output
+5V source for the internal analog circuit
Right channel reference voltage terminal
Left channel reference voltage terminal
Left channel sound waveform output
Ground (0V) source for the left channel
Word clock input
Not used. Connected to ground.
Sound data input
Bit clock input
KEY CONTROLLER (LSI107: HG52E35P)
The key controller generates key scan signals and provides them to the keyboard. By counting the time
between first-key input signal FI and second-key SI from the keyboard, the key controller detects key
velocity. The note number and its velocity data are read at regular intervals by the CPU.
Key Controller
LSI107
HG52E35P
RD
APO
CLOCK
A13
A14
KC0
~
CRDB
CWRB
CKI
CCSB
WR
Keyboard
KC
Key scan signal
KC7
First contact
RESB
RESET
CD0
FI0
SI0
Data bus
Key input signal
CD7
Address bus
FI
FI7
CA0 ~ CA2 SI7
— 14 —
SI
Second contact
The following table shows the pin functions of LSI107.
Pin No.
Terminal
In/Out
1
REQB
Out
4
5
FI8 ~ FI10,
SI8 ~ SI10
VCC
CRDB
6
CWRB
2, 3, 60 ~ 63
Function
Not used
In
Not used. Connected to + 5V.
In
In
+5V source
Read enable signal input
In
Write enable signal input
7
CCBB
In
Chip select signal input
8, 9, 11
10
T, STBY, W
RESB
In
In
Not used. Connected to +5V.
Reset signal input
12
CKI
In
10 MHz clock input
13, 14
15
16
17
18
19
20 ~ 23, 25 ~ 28
24
29 ~ 31
32
33 ~ 39, 41 ~ 43
53 ~ 55, 57 ~ 59
40
44 ~ 47, 49 ~ 52
48, 56
64
TMD, TST
CKO
GND
XIN
XOUT
TRES
CD0 ~ CD7
GND
CR0 ~ CR2
VCC
FI0 ~ FI7,
SI0 ~ SI7
VCC
KC0 ~ KC7
GND
VCC
In
Out
In
In
Out
In
In/Out
In
In
In
In
In
Out
In
In
Not used. Connected to ground.
Not used.
Ground (0V) source
Not used. Connected to ground.
Not used.
Not used. Connected to ground.
Data bus
Ground (0V) source
Address bus
+5V source
Key input signal input
+5V source
Key scan signal
Ground (0V) source
+5V source
FILTER BLOCK
Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the
waveforms.
AVDD AVDD
10V22µ
18K
C333(H)
Q107/108
2SC1740
1K
+
1K
From the DAC
1K
AG
AG
— 15 —
AG
1K
1K
C222(H)
C103(H)
To main volume
IC105
M5218APR
50V1µ
AG
POWER AMPLIFIER (IC402: LA4598)
The power amplifier is a two-channel amplifier with standby switch.
The following table shows the pin function of IC402.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Terminal
Power GND
Ch1 B.S.
Ch1 OUT
VCC
Ch1 N.F.
Ch1 IN
D.C.
Pre GND
Stand by
Ch2 IN
Ch2 N.F.
Ch2 OUT
Ch2 B.S.
NC
In/Out
In
Function
Ground (0V) source
Terminal for a bootstrap capacitor
Channel 1 output
+9V source
Negative feedback input
Channel 1 input
Terminal for a decoupling capacitor
Ground (0V) source
Power control signal input. 0 V: Off, +9 V: On
Channel 2 input
Negative feedback input
Channel 2 output
Terminal for a bootstrap capacitor
Not used
Out
In
In
In
In
In
In
In
Out
LED DRIVING
LVDD
La ~ Lg, Lp
LS0 ~ LS7
CPU
Q104 ~Q111
LED Driver
IC371
BA612
LED Driver
LSI106
HD6433298A42F
IC102
TC74HC174AF
P40
KP0 ~KP5
(KO0 ~ KO5)
LG
P41
KO Signal Generator
— 16 —
MAJOR WAVEFORMS
A.1 s
A 1 µs
A.1 s
CH1
3
A 1 ms
CH1
B
1
CH1
CH1
E
CH2
C
4
CH2
2
CH2
D
5
CH3
CH1: 5 V CH2: 5 V
2
CH1: 5 V CH2: 5 V
CH1: 5 V CH2: 5 V
1 Voltage VDD
3 Power ON signal PSW
CG connector pin 6
Initial reset signal
RH5VL36A pin 1
4
5
~
CH1: 20 mV
CH3: 5 V
B Word clock WOK1
HD6433298A42F pin 5
APO signal
HD6433298A42F pin 59
Reset signal
HD6433298A42F pin 3
A 20 µs
6
C
D
CG connector pin 3
F Filter output AOL
CG connector pin 4
Tone : Whistle (No. 078)
Key : A4
Touch response : OFF
A . 1 ms
A 10 ms
Note OFF
9
CH1
CH2
8
G
0
CH2
A
CH3
CH1
CH3
Note ON
CH1: 5 V CH2: 5 V
CH3: 5 V
CH1: 5 V CH2: 5 V
CH3: 5 V
6 Key scan signal KC0
9 Button scan signal KO0
HG52E35P pin 44
Key scan signal KC1
HG52E35P pin 45
Key scan signal KC2
HG52E35P pin 46
CE connector pin 1
Button scan signal KO1
CE connector pin 2
Button scan signal KO2
CE connector pin 4
7
8
0
A
CH1: 5 V
G MIDI signal output
CG connector pin 16
— 17 —
~
CH2: 20 mV
E Filter output AOR
UPD6376GS pin 13
Data S1 (Note OFF)
UPD6376GS pin 15
Bit clock BOK
UPD6376GS pin 16
CH1
7
CH2
F
SCHEMATIC DIAGRAMS
AMP./VOLUME PCBs JCM715-MA2M/MA3M
— 18 —
MAIN PCB JCM715-MA1M
17
2
16
3
14 13
5
15
12
4
1
6
9
10
11
— 19 —
7
8
CONSOLE PCBs JCM715-CN1M/2M/3M
— 20 —
KEYBOARD PCBs M616T-KY1M/KY2M
— 21 —
EXPLODED VIEW
14
11
13
15
7
1
12
9
8
10
17
16
3
11
6
19
18
20
— 22 —
2
20-1
22
21
20-2
5
24
4
23
PARTS LIST
GZ-500
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
N
N
N
N
1
LSI101
LSI102
LSI103
LSI104
LSI105
LSI106
LSI107
IC101
IC102
IC103
IC104
IC105
Q101, Q102
Q103 ~ Q111
D101
D102
X101
X102
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Code No.
Parts Name
Main PCB
6923 6180 PCB ass'y M715-MA1M
2012 1498 LSI
2012 1316 LSI
2012 0777 LSI
2114 4221 LSI
2012 0770 LSI
2012 0462 LSI
2011 5194 LSI
2114 4214 IC
2105 4452 IC
2105 3122 IC
2105 4445 IC
2105 4536 IC
2252 1169 Chip transistor
2250 1169 Chip transistor
2390 1729 Chip diode
2390 1820 Chip diode
2590 2107 Crystal oscillator
2590 2100 Ceramic oscillator
Amp./Volume PCBs
2
6923 6190 PCB ass'y M715-MA2,3M
IC401
2105 2114 IC, Regulator
IC402
2114 2891 IC
IC403
2114 1421 IC, Photocoupler
Q401, Q404 2220 1387 Transistor
Q402
2253 0581 Transistor
Q403
2251 0665 Transistor
Q405
2251 0651 Transistor
Q406
2200 4409 Transistor
D401
2360 0098 Zener diode
D402
2360 2261 Zener diode
2390 1344 Diode
D403,
D407~D409
D404
2310 7996 Zener diode
D405
2390 2408 Diode
D406
2390 0371 Diode
3501 7049 Power jack
J101
3612 0665 Phone jack
J102
3612 0789 Jack
J103
3501 4816 DIN jack
J104
2765 1575 Slide volume
VR101
Console PCBs
3
6923 6200 PCB ass'y M715-CN123M
IC371
2114 3318 IC
D372~D391 2390 1344 Diode
LED371/372 2370 1197 LED
LED373
2370 0959 LED
LED374
2370 1141 LED
2370 0987 LED
LED375
Keyboard PCBs
4
6923 6240 PCB ass'y M616T-KY1M
2301 0101 Diode
5
6923 6250 PCB ass'y M616T-KY2M
Notes: N – New parts
M – Minimum order/supply quantity
R – Rank
— 23 —
Specification
Q
FOB Japan
N.R.Yen
R
Unit Price
M140244*1
TC5316200CF-C117
HG51B155FD-1
LC33832M-70-TLM
UPD6376GS-E1
SRM2264LM90-B
HD6433298A42F
HG52E35P
M5218AFP-600C
HD74HC174FPTR
HD74HC00FP-TR
HD74HC08FPTR
RH5VL36AA-T1
2SC4081-T106S
2SA1576AT106S
RB411DT146
1SS355TE-17
HC-49S24A
CSACS20.00MX040-TC
1
1
1
1
1
1
1
1
1
1
1
1
1
2
9
1
1
1
1
7,810
980
1,160
410
200
280
860
600
39
51
35
34
44
8
8
24
9
130
70
A
A
A
A
A
A
A
A
B
B
B
B
B
B
B
C
C
B
B
M140245*1
S-81350HG
LA4598
PC900V
2SC1740SQ-TP-T
2SD1858R.S-TV6-T
2SB1240R.S-TV6-T
2SB1274-CCC
2SA933-SQ-TP-T
RD5.1ESB2-T1-T
RD5.1JSB3-T1-T
1SS133T-77-T
1
1
1
1
2
1
1
1
1
1
1
4
2,350
65
140
210
13
24
26
47
14
14
9
3
B
A
A
B
A
A
A
A
B
A
A
C
RD4.7ESB2-T1-T
1FWJ43N(TPA3)
DSK10B-BT-T
HEC2305-01-330
YKB21-5006
YKB21-5010
YKF51-5051
EWA-MJ0S10B23
1
1
1
1
1
1
1
1
12
27
11
29
60
60
110
110
B
C
C
A
B
B
B
B
M240232*1
BA612
1SS133T-77-T
MVR3378S-B102
LN882RPX-(TT)
SL-9352-60
LN28RPX-(TT14)
1
1
21
2
1
1
1
1,170
98
3
18
27
200
17
B
B
C
C
C
B
C
M111750*3
1S2473-T-77-T
M111751*3
1
64
1
870
8
830
B
C
B
N
N
N
N
N
N
N
N
N
N
N
N
Item
VR102
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20-1
20-2
21
22
23
24
Code No.
Parts Name
2301 0101 Diode
Bender
2765 1141 Rotary volume
6923 6450 Bender knob
Mechanical Parts
6906 7781 Rubber button, Light gray
6923 6420 Rubber button, White
6923 6410 Rubber button, Gray
6923 6400 Rubber button, Pink
3831 0357 Speaker
6923 6390 Top panel
6923 6430 Slide knob
6923 6381 Display plate
6922 2840 White key set, CEGB
6922 2850 White key set, DFA
6922 2860 White key set, DFAS
6922 2740 Black key set,10-key
6922 2750 Black key set, 5-key
6906 7805 Case
6902 6140 Battery spring
6903 2150 Battery spring
6922 2761 Key contact rubber LT-CB
6922 2771 Key contact rubber LT-CS
6922 2631 Bottom plate
6906 7876 Battery cover
Accessory
6920 8691 Music stand
Notes:
N – New parts
M – Minimum order/supply quantity
R – Rank
— 24 —
Specification
1S2473-T-77-T
FOB Japan
N.R.Yen
R
Unit Price
58
8
C
Q
RK1631110-50KB
M340169-2
1
1
190
60
B
C
M312088A-3
M312125-3
M312123-3
M312122-3
1221AF
M140150-1
M311860-2
M340172A-1
M111723-1
M111724-1
M111725-1
M111726-1
M111726-2
M111732E*3
M41226-1
M41330-1
M211704A-1
M211705A-1
M211706A-1
M311164F*9
1
2
1
1
2
1
1
1
5
4
1
2
1
1
1
1
4
1
1
1
97
67
28
28
1,000
1,340
13
170
100
100
100
120
86
1,340
27
18
89
91
360
180
B
B
B
B
B
C
B
C
A
A
A
A
A
C
C
C
B
B
C
B
M311760A-1
1
130
B
MA0800751A