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General Music Pianovelle PS2500 Service Manual

Schematic diagrams.
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SERVICE MANUAL

Schematic Diagrams

Power Aamplifier. & Supply, Control Midi I/O, Keyboard Interface and Cross Over PCB Layouts
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
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.
µ
The ( ) micro symbol of capacitance value is substituted by U. The (
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.
CODE : 270189
PS 2500 Opening Instructions - KeyboardDisassembling
GPS 2500 Opening Instructions - Keyboard Disassembling
Power Amplifier & Supply, Phones, Cross Over and Control & Midi I/O Schematic Diagrams
Slider, L & R Controls Panel and Controls Panel Interface Schematic Diagrams
Right & Left Control Board - Control Panel Interface PCB Layout
L & R Contacts and Keyboard Interface Schematic Diagrams
CPU & Sound Generator and Audio/Video Interface PCB Layouts
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.
Ω ) omega symbol of resistance value is substituted by E.
Soldering point.
Supply voltage.
Male connector.
Logic supply ground.
Female connector.
Analog supply ground.
M/F faston connector.
Signal ground.
Test point.
Chassis ground.
Flag joined with one or more flags with the same signal name inscribed.
Index & Warnings
2
3
4
PS 2500 Cabinet Assembly 1
5
PS 2500 Stand & Controls Assembly 2
6
GPS 2500 Cabinet Assembly
7
Block Diagram
8
9
10
11
12
13
Timing Diagram & Adjustment Table
14
CPU & Sound Generator Board (Part 1/2)
15
CPU & Sound Generator Board (Parts 2/2)
16
Audio/Video Interface Schematic Diagram
17
18
Optional Kits Mounting Instructions
19
Spare Part List
ATTENTION
Observe ecautions when handling
electrostatic sensitive devices
1 1 1 1 1

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Table of Contents

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   Summary of Contents for General Music Pianovelle PS2500

  • Page 1: Service Manual

    Index & Warnings PS 2500 Opening Instructions - KeyboardDisassembling GPS 2500 Opening Instructions - Keyboard Disassembling PS 2500 Cabinet Assembly 1 PS 2500 Stand & Controls Assembly 2 GPS 2500 Cabinet Assembly Block Diagram Power Amplifier & Supply, Phones, Cross Over and Control & Midi I/O Schematic Diagrams Power Aamplifier.
  • Page 2 Remove the two locking plates (A) from the sides. PS2500 - To Open the Instrument Remove the keyboard cover (slide it through the lateral guides). To unlock the controls panel unscrew the three screws (B). Disconnect the instrument from the mains. Unscrew the four screws at the rear of instrument.
  • Page 3 To easy access to the internal circuitry, you must remove the controls panel. Unscrew the three screws (A), disconnect the three grounding jumpers (B), GPS2500 - To Open the Instrument pull the controls panel toward you and raise it. Disconnect the instrument from the mains. Lift the cover and unscrew the three screws (A). To install the optional accessories it is not necessary to disconnect other Remove the protection panel by lifting it from the rear (B).
  • Page 4 View A View B CONTROLS PANEL (see next page) AUDIO/VIDEO INTERFACE BOARD HARD DISK BRACKET View A View B HARD DISK AUDIO/VIDEO INTERFACE BOARD & H. D. SUPPORT TWEETER TWEETER SUPPORT DISK DRIVE GROUP SUPPORT 3.5" DISK DRIVE DISK-DRIVE SUPPORT CPU &...
  • Page 5 COVER KEYBOARD COVER CABINET SPEAKER BOX LEFT SIDE LEG RIGHT SIDE LEG MUSIC STAND PEDAL CROSS-BAR TRIPLE PEDAL ASSEMBLY AC-DC ADAPTER SCREEN CONTROL PANEL INTERFACE BOARD BOARDS SUPPORT DIAL KNOB SLIDER POTENTIOMETER KNOB SLIDER POTENTIOMETER FRAME RED FELT (1230x12x1.5) RIGHT CONTROLS PANEL BOARD LEFT CONTROLS PANEL BOARD SLIDERS BOARD <STYLE GROUP>...
  • Page 6 View A View C View B View C View A View B Phones Assembly Cheek Support Audio/Video Interface Board Cross-Over Board Disk Drive Support Hard Disk Support Controls & Midi I/O Board Drive Support Stand Hard Disk Power Amplifier & Supply Board Tweeter Support Hinge Between Keyb.
  • Page 7 M. Palanghi DWG# 550120 PCB# GENERALMUSIC S.p.A. ITALY PS2500 GPS2500 BLOCK DIAGRAM ALL RIGHTS ARE RESERVED, NO COPIES G. Boccato DISK: PART: OR REPRODUCE THIS DOCUMENT WITHOUT WRITTEN CONSENT BY GENERALMUSIC. APP. R. Falconi REV: 06-12-96 7 7 7 7 7...
  • Page 9 CROSS OVER BOARD (PCB LAYOUT). KEYBOARD INTERFACE BOARD (PCB LAYOUT). POWER AMPLIFIER & SUPPLY BOARD (PCB LAYOUT). CONTROLS & MIDI I/O BOARD (PCB LAYOUT). DWG: 315102-315103- GENERALMUSIC S.p.A. Italy DRW: BOCCATO PS2500 SCHEMATIC DIAGRAM 315024-315107 Pwr Amp. & Sup. B. - Controls & MIDI I/O B. ALL RIGHTS ARE RESERVED, NO COPIES OR CKD: RICCOBELLI DISK: 42 PART: 1/1...
  • Page 11 LEFT CONTROLS PANEL BOARD (PCB LAYOUT). CONTROLS PANEL INTERFACE BOARD (PCB LAYOUT). RIGHT CONTROLS PANEL BOARD (PCB LAYOUT). DWG: 315099-315100- GENERALMUSIC S.p.A. Italy PS2500 DRW: BOCCATO SCHEMATIC DIAGRAM 315101 L & R Control Panel Board - Control Panel ALL RIGHTS ARE RESERVED, NO COPIES OR CKD: RICCOBELLI DISK: 42 PART: 1/1 REPRODUCE THIS DOCUMENT WITHOUT...
  • Page 13 13 13 13 13 13...
  • Page 15 15 15 15 15 15...
  • Page 17 CPU & SOUND GENERATOR BOARD (PCB LAYOUT). DWG: 315083-315092 - GENERALMUSIC S.p.A. Italy SLIDERS BOARD (PCB LAYOUT). DRW: PALANGHI PS2500 SCHEMATIC DIAGRAM 315104 AUDIO / VIDEO INTERFACE BOARD (PCB LAYOUT). Cpu & Sound Generator Board - Audio/ ALL RIGHTS ARE RESERVED, NO COPIES OR CKD: BOCCATO DISK: 42 PART: 1/1 REPRODUCE THIS DOCUMENT WITHOUT...
  • Page 18 Hard disk rear connector. KIT 970207 - Hard disk installation kit mounting instructions: KIT 970241 (PAL) - KIT 970245 (NTSC) - Audio/Video interface mounting instructions: - Locate the CPU board [A] and remove the support [B] by screwing the locking screws [6]. - Insert the DRAM module [2] into the CPU’s CN9 connector [C].
  • Page 19 955955 Disk “Demo 01” 261130 Right Side Leg (R) 171289 Dome Tweeter Support 260334 Cover (B) Spare Part List Spare Part List Spare Part List Spare Part List Spare Part List 955960 Disk “Operating System” (Baldwin) 260561 Right Side Leg (R) (Baldwin) 171286 Disk Drive Group Support 260346...
  • Page 20 100067 LM337 1.2-37V 1.5A Adjustable Regulator 151124 A Key 340466 Spacer H=8mm 090182 BC173C TO92 Npn Transistor 100061 TL072 Dual J-Fet Operational Amplifier 151123 G Key 340155 Spacer H=15mm 090153 BC327 TO92 Pnp Transistor 100045 7812 +12V 1A Voltage Regulator 151122 F Key 230584...

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