11
11
1
Index
Soldering point.
Male connector.
Female connector.
M/F faston connector.
Test point.
Supply voltage. Logic supply ground.
Analog supply ground.
Chassis ground.
Earth ground.
Flag joined with one or more flags
GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12
Phone +39(0)541/959511 - Fax +39(0)541/957404 - Internet: www.generalmusic.com
Introduction, Checks & Adjustments.2
RS232 PC - RS422 MAC Cables.3
Block Diagram.
6
In/Out Board Schematic.
7 Left Controls Panel Board Schematic.
8
Keyboard Interface & L/R Contact Board Schematics.
9 Right Controls Panel Board (part2/2) & Lower Controls Panel Board Schematics.
10
Cpu & Sound Generator Board (part 2/2) Schematic. 11
256+256Mb Dual Drake Sound Board (part 1/2) Schematic.12
Left & Lower Controls Panel PCB Layouts.
13
Right Controls Panel Board (part 1/2) Schematic.
14
Right Controls Panel & 256+256Mb Dual Drake Sound PCB Layouts.
15
Cpu & Sound Generator Board (part 1/2) Schematic.
4
Pot Motor Supply & Standby Board Schematic & Timing Table. 5
In/Out, Pot Motor Supply & Standby & Keyboard Interface PCB Layouts.
256+256Mb Dual Drake Sound Board (part 2/2) Schematic.
16
17
Cpu & Sound Generator PCB Layout.18
Spare Part List.
19
with the same signal name inscribed.
ATTENTION
Observe precautions when handling electrostatic sensitive devices.
Notice
Service must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee period
will forfeit the right to guarantee.
For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.
To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.
All components marked by this symbol have special safety characteristics, when replacing any of these components use only
manufacturer's specified parts.
The (µ) micro symbol of capacitance value is substituted by U.
The (
Ω
) omega symbol of resistance value is substituted by E.
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified.
All resistors are 1/8W unless otherwise specified.
All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.
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SERVICE MANUAL
code 270278
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