Схема и документация усилителя Other GM AS-1

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C O D E : 2 7 0 1 8 4
Spare Part List
Soldering point.
Male connector.
Female connector.
M/F faston connector.
Test point.
Supply voltage.
Logic supply ground.
Analog supply ground.
Signal ground.
Chassis ground.
Flag joined with one or more flags with the same signal name inscribed.
GENERALMUSIC S.p.A. Sales Division: 47048 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. 0541/959511 - tlx 550555 GMUSIC I - fax 0541/957404
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.
Schematic Notes
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 (
) 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.
precautions when handling
electrostatic sensitive devices
SERVICE MANUAL
Schematic Diagrams
970235 230v 230mA AC/DC Adapter660503 AS1 To WK Keyboard Attachment271072 Owner's
150618 M6 19mm Screw With Thumb130430 1Mt Length Midi Cable120456 M6 1.5mm Black Washer120110 M6 12mm Screw
660502 Top
652874 Bottom
340838 17 Keys Rubber Pad340120 Plexiglass Display Screen190015 Adhesive Rubber Foot761097 AS1 Board (Pcb# 310537) (1st Version)761133 AS1 Board (Pcb# 310568) (2nd Version)550606 * 27C256 256Kbit Program Eprom (1st Version)340856 * 6,4mm Led Spacer230569 * FL5R200PNT EMI Coil For Signal230559 * 20uH 50V 3A Dc Line Filter140529 * Microswitch 12v 50ma 0.25mm140212 * Horizontal Female 5 Poles Din Socket140211 * Horizontal Male Dc Socket110267 * 1Switches 2 Positions Hor Slider Switch104019 * ST24W02 2Kbit Serial Access EEprom Smd103016 * 74HC373DW Soic Octal D-Type Latch103010 * 74HC04D Soic Hex Inverter103002 * 74HC245DW Soic Octal Bus Transceiver100744 * 80C251 Cpu (1st Version)550640 * AT89C55 Programmed Cpu (2nd Version)100059 * 7805 +5v 1A Voltage Regulator100035 *
Optocoupler
091001 * BC857 TO236 Smd Pnp Transistor081000 * PMLL4148 Smd 100ma 75v Signal Diode080747 * 2mm Dot Diffused Red Led080717 * HDN1105 7 Segments Display080156 * 1N4002 1A 100V Rectifier Diode010723 * 4MHz Ceramic Resonator With CapacitorsNote:
Each spare part is single quantity unless otherwise specified.Asterisk prefix explanation:Omitted
= First level spare part.
One asterisk
= Second level, part of previous listed first level part.
Two asterisk
= Third level, part of previous listed second level part.
Three asterisk = ............Any request for not above mentioned part must encompass specific description including:1) Model name,2) Section name,3) Module code,