GZ-5
(with price)
VELOCITY
pmpmf f ff
pp
OCTAVE SHIFT
PROGRAM
VELOCITY1VOLUME
CHANGE
0
C2 C3 C4 C5 C6
MODULATIONPITCH BEND
C1
PIANO
E. PIANO E. GUITAR
2
VIBRAPHONE
ORGAN
EXPRES-
PAN
3
EFFECT
HOLD 15SOFT
SION
DEPTH
6
4
7
E. BASS STRINGS BRASS FLUTE SYNTH-LEAD VOLUME
FINE
COARSE
TUNE
TUNE
8
9
MIDI MASTER KEYBOARD
ALL NOTE
RESET ALL
OFF
CONTROLLER
BEND
CONTROL MIDI CH.
ENTER
SENS
GM RESET
BEND
CURVE
MOD.
DEPTH
POWER OFF MIDI OUT
MODE
INTERNAL
GZ-5
MIDI MASTER KEYBOARD
GENERAL
(Internal Mode)
CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SPECIFICATIONS
Number of Keys: 32
Polyphonic: 4-note
Preset Tones: 10; Piano, E. Piano, Vibraphone, Organ, E. Guitar, E. Bass, Strings,
Brass, Flute, Synth-Lead
Controls: Volume control; 5 levels, Pitch bend switch, Modulation switch
Built-In Speaker: 6.5 cm dia. 0.5 W input rating: 1 pec.
Tuning: A4=442 Hz (fixed)
Terminals: MIDI Output, AC Adapter Jack (DV 7.5 V)
Power Source: DC: 4 AA size dry batteries
Battery life: Approx. 6 hours (SUM-3/R6P)
AC: AC Adapter AD-1
Power Consumption: 0.7 W when operating by batteries
1.0 W when operating by an AC adapter
Dimensions (HWD): 50 x 399 x 132 mm
(1-15/16 x 15-11/16 x 5-3/16 inches)
Weight: 0.64 kg (1.4 lbs) including batteries
ELECTRICAL
Current Drain with 7.5 V DC:
No Sound Output 35 mA ± 20%
Maximum Volume 103 mA ± 20%
with keys A2, B2, C3 and D3 pressed
in Synth-Lead tone, Volume: Maximum
Speaker Output Level at 10 cm away from the speaker 690 mV ± 20%
with key C3 pressed in Synth-Lead tone
Volume: Maximum
Minimum Operating Voltage: 4.8 V
— 2 —
OPERATION
Transmitting MIDI Messages
To transmit MIDI messages, set the Mode Switch to the MIDI OUT position.
Operation 1
The note number is transmitted when the corresponding key is pressed.
Use the Octave Shift Switch, and select the position appropriate to the octave range you want. GZ-5 can send
note numbers 17 to 108 but it has 32 keys only.
Velocity is also transmitted when a key is pressed. GZ-5 sends the velocity in accordance with the selected
position of the velocity switch.
Data of pitch bend and modulation is transmitted when the corresponding switch is operated.
The values of the velocity, the pitch bend and the modulation switches are automatically set up to the initial
value when turning on the power.
See the appendix for information about the initial value.
See the following table for instruction how to change the value.
MIDI Message Operation switch Setting Opeartion for setting
Note No. Keyboard
Octave shift switch Octave range
Velocity Keyboard
Velocity switch Velocity value CONTROL + VELOCITY, XXX, ENTER
Pitch Bend Pitch bend switch Bend sense
Bend curve
Modulation Modulation switch Modulation depth MOD.DEPTH, XXX, ENTER
See the figure below
BEND SENS, XXX, ENTER
BEND CURVE, X, ENTER
Example of operation : CONTROL + VELOCITY, XXX, ENTER
Press CONTROL button and VELOCITY button at the same time.
Use the 10-key pads, enter a 3-digit number.
Press ENTER button.
Position of the octave switch and octave range
C1 C2 C3 C4 C5 C6
C1
C2
C4=60
C3
C4
C5
C6
— 3 —
Operation 2
e
n
e
e
f
r
The MIDI messages listed below are transmitted when completing the operation shown in the following
table.
MIDI Message Operation
Program change CONTROL + PROGRAM CHANGE, XXX, ENTER
Control change
Reset all controlle
General MIDI reset BEND CURVE + MOD. DEPTH
MIDI channel MIDI CH., XXX, ENTER
Volum
Expression CONTROL + EXPRESSION, XXX, ENTER
Hold 1 CONTROL + HOLD 1, XXX, ENTER
Soft pedal CONTROL + SOFT PEDAL, XXX, ENTER
Effect depth CONTROL + EFFECT DEPTH, XXX, ENTER
Fine tun
Coarse tun
All notes of
CONTROL + VOLUME, XXX, ENTER
Pa
CONTROL + PAN, XXX, ENTER
CONTROL + FINE TUNE, XXX, ENTER
CONTROL + COARSE TUNE, XXX ENTER
CONTROL + MIDI CH.
MIDI CH. + BEND SENSE
Example of operation : CONTROL + VELOCITY, XXX, ENTER
Press CONTROL button and VELOCITY button at the same time.
Use the 10-key pads, enter a 3-digit number.
Press ENTER button.
Notes: 1.See the appendix for information about a value to be entered, "XXX".
2.For details of MIDI message and operation, see GZ-5 operation manual.
— 4 —
Initial Value/Setting Range
Internal Mode
Tone
Bend Sens
Volume
MIDI Out Mode
Control
Program Change
Velocity
Volume
Pan
Expression
Hold 1
Soft
Effect Depth
Fine Tune
Coarse Tune
Initial Setting
Piano
2
Max.
Initial Setting
—
—
—
—
—
—
—
—
—
—
Setting Range
Piano, E. Piano, Vibraphone, Organ,
E.Guitar, E.Bass, Strings, Brass, Flute,
Synth-Lead
0 - 3
5 levels
Setting Range
0 - 127
1 - 127
0 - 127
0 - 127
0 - 127
0 - 127
0 - 127
0 - 127
0 - 127
0 - 127
Velocity
Octave Shift
Vend Sense
Bend Curve
Modulation Depth
MIDI Channel
mf (95)
C4
—
1
(Approx. 0.096 sec)
127
1
pp (50), p (70), mp (85), mf (95), f (110),
ff (127)
C1, C2, C3, C4, C5, C6
0 - 127
0 (approx. 0.048 sec.), 1 (approx. 0.096 sec)
2 (approx. 0.192 sec.), 3 (approx. 0.384 sec.)
4 (approx. 0.768 sec.)
0 - 127
1 - 16
— 5 —
MIDI Transmission
Program Change 0 - 127
Note ON/OFF
Note No.: F0 - C8 (17 - 108)
Velocity: 1 - 127 Note ON
0 Note OFF
Pitch Bend: 0 - 16383 (14 bits)
Control Change
Modulation Controller No.: 1
Controller Value: 0 - 127
Volume Controller No.: 7
Controller Value: 0 - 127
PAN Controller No.: 10
Controller Value: 0 - 127
Expression Controller No.: 11
Controller Value: 0 - 127
HOLD 1 Controller No.: 64
Controller Value: 0 - 127
Soft Pedal Controller No.: 67
Controller Value: 0 - 127
External Effect Depth
Controller No.: 91
Controller Value: 0 - 127
Registered Parameter Number
Pitch Bend Sensitivity
RPN LSB (100): 0
RPN MSB (101): 0
Data Entry MSB (6): 0 - 127
Data Entry LSB (38): 0
Fine Tune
RPN LSB (100): 1
RPN MSB (101): 0
Data Entry MSB (6): 0 -127
Data Entry LSB (38): 0
Coarse Tune
RPN LSB (100): 2
RPN MSB (101): 0
Data Entry MSB (6): 0 - 127
Data Entry LSB (38): 0
Channel Mode Message
Reset All Controller
Controller No.: 121
Controller Value: 0
All Note Off Controller No.: 123
Controller Value: 0
System Exclusive Message
GM ON
[F0] [7E] [7F] [09] [01] [F7]
Note Range of Keyboard Play
Tone
PIANO
E.PIANO
VIBRAPHONE
ORGAN
E.GUITAR
Range
F3 - C6
F3 - C6
F3 - C6
F3 - C6
F4 - C7
Tone
E.BASS
STRINGS
BRASS
FLUTE
SYNTH-LEAD
— 6 —
Range
F2 - C5
F3 - C6
F3 - C6
F3 - C6
F3 - C6
MIDI Implementation Chart
Function ... Transmitted Recognized Remarks
Version: 1.0
Basic Default
Channel Changed
Default
Mode Messages
Altered
Note
Number: True voice
Velocity Note ON
Note OFF
After Key's
Touch Ch's
Pitch Bender
Control 01
Change 06, 38
07
10
11
64
67
91
100, 101
121
1 channel
1-16 channel
—
X
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
17 ~ 108
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
O
9nH v = 1~127
X
9nH v = 0, 8nH v = ❊❊
X
X
O
O
O
*1
O
O
O
O
O
O
O
*1
O
X
X
X
X
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
X
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
❊❊ = No relation
Modulation
Data entry
Volume
PAN
Expression
Hold 1
Soft
External effect depth
RPN LSB • MSB
Reset all controller
Program
Change : True #
System Exclusive
System :Song Pos
Common :Song Sel
: Tune
System :Clock
Real Time : Commands
Aux : Local ON/OFF
Messages : All notes OFF
: Active Sense
: Reset
Remarks
Mode 1 : OMNI ON, POLY Mode 2 : OMNI ON, MONO
Mode 3 : OMNI OFF, POLY Mode 4 : OMNI OFF, MONO
O
0 ~ 127
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
O
*2
X
X
X
X
X
X
O
X
X
*1: Pitch Bend Sens
Fine Tune
Coarse Tune
— 7 —
X
❊❊❊❊❊❊❊❊❊❊❊❊❊❊
X
X
X
X
X
X
X
X
X
X
*2 : GM On
[F0] [7E] [7F] [09] [01] [F7]
*2 : GM On
O
X
: Yes
: No
MIDI Output
Driver
Q101
BLOCK DIAGRAM
KO0~KO10
KO11
CPU
Speaker
Amplifier
AN8053N
IC101
VDD
MSM6387-A23
LSI101
OUT
Oscillator
Q958, X957
KI0~KI7
Keyboard
Switches
Nomenclature of Keys
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
F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6
— 8 —
CIRCUIT DESCRIPTION
Key Matrix
KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7
KO0 F3 F#3 G3 G#3 A3 A#3 B3 C4
KO1 C#4 D4 D#4 E4 F4 F#4 G4 G#4
KO2 A4 A#4 B4 C5 C#5 D5 D#5 E5
KO3 F5 F#5 G5 G#5 A5 A#5 B5 C6
KO4 Pad 0 Pad 1 Pad 2 Pad 3 Pad 4
KO5 Enter Pad 5 Pad 6 Pad 7 Pad 8 Pad 9
KO6
KO7
KO8
KO9
KO10 Internal MIDI Out
Pitch
Bend -
Volume UpVolume
Down
VelocityffVelocityfVelocitymfVelocitympVelocitypVelocity
Octave
Shift C6
Octave
Shift C5
Octave
Shift C4
Bend
Sense
Octave
Shift C3
MIDI CH. Control
Pitch
Bend +
Modula-
tion
pp
Octave
Shift C2
Octave
Shift C1
CPU (LSI101: MSM6387-A23)
Containing a MIDI controller, the CPU outputs MIDI messages in accordance with the pressed keys and
buttons.
The following table shows the pin functions of LSI101.
Pin No. Terminal In/ Out Function
1, 2 TEST1, TEST2 Not used. Connected to ground.
3 RESET In Power ON reset input. On: +6V Off: 0V
4 AVDD In +5 V sorce for the built-in DAC
5 OUT Out Sound waveform output
6 AGND In Ground (0 V) source for the built-in DAC
7 GND In Ground (0 V) source
8 COSI In 21.725 MHz clock pulse input
9 COSO Not used.
10 VDD In +5 V source
11 ~ 18 KI0 ~ KI7 In Input terminal from keys and switches
19 KO11 Out MIDI signal output
20 ~ 30 KO10 ~ KO0 Out Key and switch scan signal output
— 9 —
SCHEMATIC DIAGRAMS
— 10 —
Main PCB JCM558-MA1M
— 11 —
EXPLODED VIEW
2
1
3
4
5
5
6
12
7
8
9
10
11
12-2
12-1
13
14
— 12 —
PARTS LIST
GZ-5
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
Electrical Parts
N 12 6923 6680 PCB ass'y JCM558-MA1M M240209*1 1 1,650 B
N LSI101 2012 0196 LSI MSM6387-A23 1 430 A
IC101 2114 3269 IC AN8053N 1 110 A
Q101 2220 1387 Transistor 2SC1740SQ-TP-T 1 13 B
Q958 2220 1387 Transistor 2SC1740SQ-TP-T 1 13 B
X959 2590 1897 Ceramic oscillator EFO-EN2175C4 1 60 B
D101~D158, 2390 1344 Diode 1SS133T-77-T
60
3B
D160, D163
D159 2360 2429 Zener diode MTZJ4.3B-T77-T 1 8 B
D161 2390 0371 Diode DSK10B-BT-T 1 11 B
LED101
2370 1106 LED MPR3338S-B99
1
24 B
J101 3501 3731 Power jack HEC2305-01-250 1 30 B
N J102 3501 4830 DIN jack YKF51-5050 1 70 B
12-1 6917 1762 Battery spring (+) M410913B-1 1 5 C
12-2 6922 1760 Battery spring (-) M412226-1 1 10 C
Mechanical Parts
N 1 6906 7751 Slide knob, Gray M311859A-3
N
2 6906 7761 Slide knob, Purple M311859A-4 1
N 3 6923 9070 Upper case sub ass'y M340288*1
N
4 3831 0812 Speaker 0023-249-0-0013 1
5 6909 5890 Slide contact CSB-12D 3
N
N
6 6923 6740 Bender knob M340143-1 2
7 6923 6730 Rubber button M340142-1 1
8 6917 1571 White key set M210610A-1
9 6917 1580 Black key set M210609-1
10 6917 1591 Key contact rubber M210605A-1
N 11 6923 6750 Button contact rubber M340144-1
N 13 6923 9060 Lower case sub ass'y M340287*1
N 14 6906 7931 Battery cover M312197A*6
2
1
1
1
1
4
1
1
12 B
12 B
570 C
150 B
35 B
80 C
200 C
69 A
41 A
80 A
15 B
450 C
35 B
Notes: N – New parts
M – Minimum order/supply quantity
R – Rank
— 13 —
MA0700951A
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