GEM equinox, Service Manual

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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 - tel. 0541/959511 - fax 0541/957404
GENERALMUSIC on the NET: http://www.generalmusic.com

Opening and Keyboard Disassembling Instructions & NOTICE

2

Layout

3

1st and 2nd version Block Diagrams

5

Cpu & Sound Generator Map

6

7

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Controls Interface & Controls Panel Board Schematics

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Cpu & Sound Generator Schematic (Part 1/2)

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Cpu & Sound Generator Schematic (Part 2/2)

11

Vocal Processor Board Schematic & Pcb Layout (Optional Accessory)

12

13

Test & Adjustment Procedure, Spare Part List

14

Controls Panel Pcb Reverse Layout, Controls Interface and Keyboard Interface Pcb Layout

4

Cpu & Sound Generator Pcb Layout

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16

SERVICE  MANUAL

 CODE: 270217 

Warnings

with the same signal name inscribed.

Address

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 1/8

Ω

 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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Assembly & Wiring Connections 1st version

Timing Table

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Assembly & Wiring Connections 2nd version

61 and 76 Notes L/R Contact Boards, Keyboard Interface Board Schematics

Power Supply, Phones, Midi & Controls I/O Pcb Layouts

Mixer Board Schematic and Pcb Layout 2nd Version

Power Supply, Phones, Midi & Controls I/O, Analog I/O Board Schematics 1st Version

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