General Music Pianovelle PS2500, Pianovelle GPS2500 Service Manual

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CODE:270189

Index&Warnings

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. SalesDivision :47048 S.Giovanni in Marignano(RN) ITALY -V iadelle Rose, 12 -

tel. [phone]- tlx 550555 GMUSIC I- fax [phone]

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. & Supply, Control Midi I/O, Keyboard Interface and Cross Over PCB Layouts

Slider, L & R Controls Panel and Controls Panel Interface Schematic Diagrams

Right & Left Control Board - Control Panel Interface PCB Layout

CPU & Sound Generator Board (Part 1/2)

CPU & Sound Generator Board (Parts 2/2)

Optional Kits Mounting Instructions

Spare Part List

L & R Contacts and Keyboard Interface Schematic Diagrams

Timing Diagram & Adjustment Table

Audio/Video Interface Schematic Diagram

CPU & Sound Generator and Audio/Video Interface PCB Layouts

2
3
4
5
6
7
8
9
10
11
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15
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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.

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 ( ) micro symbol of capacitance value is substituted by U. The (µΩ) 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.

ATTENTION

Observeprecautions when handling

electrostatic sensitive devices

SERVICE MANUAL

Schematic Diagrams

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2

C
D

C

D

C

D

C

C

C
D

D

C

C

C
D

C
D

C
D

To remove the TP20 keyboard unscrew 11 screws (C) under the piano.
To remove the TP10 keyboard unscrew 8 screws (D) under the piano.

Unscrew the four screws at the rear of instrument.

Disconnect the instrument from the mains.
Remove the top panel in the direction as shown.

PS2500 - To Open the Instrument

DRW

APP.

CKD

WRITTEN CONSENT BY GENERALMUSIC.

OR REPRODUCE THIS DOCUMENT WITHOUT

ALL RIGHTS ARE RESERVED, NO COPIES

GENERALMUSIC S.p.A. ITALY

PART:

DWG#

DISK:

REV:

PCB#

Consorte

Riccobelli

Boccato

550115

19/12/96

42

& Keyboard Disassembling

PS2500 Opening Instructions

1/1

NOTE: Before you remove a natural key you must remove the keyboard, if you remove a sharp key this operation is not necessary.

To remove a key insert a screwdriver or other similar object in the split at the key back, apply a light pressure and push in the direction shown.

NOTE: To remove a sharp key before you must remove the near natural keys.

Remove the key return spring.

Unlock the key appling not much strength

Remove the keyboard cover (slide it through the lateral guides).
To unlock the controls panel unscrew the three screws (B).

B

Remove the two locking plates (A) from the sides.

A

B

A

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33

3

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DRW

APP.

CKD

WRITTEN CONSENT BY GENERALMUSIC.

OR REPRODUCE THIS DOCUMENT WITHOUT

ALL RIGHTS ARE RESERVED, NO COPIES

GENERALMUSIC S.p.A. ITALY

PART:

DWG#

DISK:

REV:

PCB#

Consorte

Riccobelli

Boccato

550116

20/12/96

42

& Keyboard Disassembling

GPS2500 Opening Instructions

1/1

C

To remove the TP10 keyboard unscrew 8 screws (D) under the piano.

To remove the TP20 keyboard unscrew 11 screws (C) under the piano.

D

C
D

D

C

D

C

C

C

D

C

C

C

GPS2500 - To Open the Instrument

Remove the protection panel by lifting it from the rear (B). Unscrew the two lateral screws (C).

Disconnect the instrument from the mains. Lift the cover and unscrew the three screws (A).

Note: to operate without difficulty two people are required.

Lift up the front panel with the keyboard cover raised.

NOTE: To remove a sharp key before you must remove the near natural keys.

C

C
D

C
D

D

C

Unlock the key appling not much strength

To remove a key insert a screwdriver or other similar object in the split at the key back, apply a light pressure and push in the direction shown.
NOTE: Before you remove a natural key you must remove the keyboard, if you remove a sharp key this operation is not necessary.

Remove the key return spring.

A

B A

B

jumpers of the controls panel, rest the panel temporarily on the keyboard.

pull the controls panel toward you and raise it.

To re-assemble the piano follow the instructions in reverse order.

To easy access to the internal circuitry, you must remove the controls panel.
Unscrew the three screws (A), disconnect the three grounding jumpers (B),

To install the optional accessories it is not necessary to disconnect other

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4

DRW

APP.

CKD

WRITTEN CONSENT BY GENERALMUSIC.

OR REPRODUCE THIS DOCUMENT WITHOUT

ALL RIGHTS ARE RESERVED, NO COPIES

GENERALMUSIC S.p.A. ITALY

PART:

DWG#

DISK:

REV:

PCB#

FALCONI

BOCCATO

PALANGHI

550117

17-12-96

42

CABINET ASSEMBLY

PS2500

1/1

2

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13

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Ref.

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Description

CABINET

HEATSINK GRID
PHONES BOARD

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10

14

12

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16
15

9

5
4

6

8
7

LEFT COVER CLAMP

KEYBOARD SLOPE SUPPORT

KEYBOARD ASSEMBLY (TP20 OR TP10)

CONTROL PANEL REAR SUPPORT

CONTROL PANEL FRONT SUPPORT

RIGHT COVER CLAMP

MAINS ASSEMBLY

MAINS SWITCH

RIGHT PANEL SUPPORT

LEFT PANEL SUPPORT

RACK

CONTROLS & MIDI I/O BOARD

MAINS FILTER BOARD

POWER AMPLIFIER & SUPPLY BOARD

CROSSOVER BOARD

TRANSFORMER ASSEMBLY

17

18

19

CPU & SOUND GENERATOR BOARD
CPU & SOUND GENERATOR BOARD SUPPORT

30

AUDIO/VIDEO INTERFACE BOARD

DISK DRIVE GROUP SUPPORT

3.5" DISK DRIVE
DISK-DRIVE SUPPORT

HARD DISK

HARD DISK BRACKET

TWEETER SUPPORT

25

22
21
20

24
23

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TWEETER

CONTROLS PANEL (see next page)

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1

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10

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7

24 22

23

8

9

View B

View B

View A

View A

AUDIO/VIDEO INTERFACE BOARD & H. D. SUPPORT

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23

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DRW

APP.

CKD

WRITTEN CONSENT BY GENERALMUSIC.

OR REPRODUCE THIS DOCUMENT WITHOUT

ALL RIGHTS ARE RESERVED, NO COPIES

GENERALMUSIC S.p.A. ITALY

PART:

DWG#

DISK:

REV:

PCB#

Falconi

Boccato

Palanghi

550118

18-12-96

42

ASSEMBLY

STAND & CONTROLS PANEL

1/1

13

18

19

DISPLAY FRAME

DISPLAY GLASS

DISPLAY RIGHT RUBBER KEY-PAD

CONTROL PANEL

DISPLAY SUPPORT

CLOTH FOR PANEL SLITS

DISK-DRIVE FRAME

LCD DISPLAY ASSEMBLY

6

7

8

4
3

1

Ref.

2

5

14

Description

COVER
KEYBOARD COVER

SPEAKER BOX
LEFT SIDE LEG

CABINET

DIAL KNOB

TRIPLE PEDAL ASSEMBLY

<EDIT> RUBBER KEY-PAD

SLIDERS BOARD

<START/STOP> RUBBER KEY-PAD
<SOUND GROUP> RUBBER KEY-PAD

DISPLAY LEFT RUBBER KEY-PAD

MUSIC STAND
PEDAL CROSS-BAR

AC-DC ADAPTER SCREEN
CONTROL PANEL INTERFACE BOARD

SLIDER POTENTIOMETER KNOB
SLIDER POTENTIOMETER FRAME
RED FELT (1230x12x1.5)

LEFT CONTROLS PANEL BOARD

RIGHT CONTROLS PANEL BOARD

<STYLE GROUP> RUBBER KEY-PAD

RIGHT SIDE LEG

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3

BOARDS SUPPORT

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6

DRW

APP.

CKD

WRITTEN CONSENT BY GENERALMUSIC.

OR REPRODUCE THIS DOCUMENT WITHOUT

ALL RIGHTS ARE RESERVED, NO COPIES

GENERALMUSIC S.p.A. ITALY

PART:

DWG#

DISK:

REV:

PCB#

Falconi

Boccato

Pannelli

550119

20-01-97

42

Cabinet Assembly

GPS2500

1/1

Hole Closing Sheet

Hole Closing Sheet

Hinge Between Keyb. Cover and Front P.

Hinge Between Rev. Cover and Cover
Net For Speaker Panel

Adhesive Beating Rubber

Washer For Cover Stand

Hinge Between Cabinet and Cover

Hinge For Cover Stand

Audio/Video Interface Board
Hard Disk Support

Hinge Between Keyb. Front & Top Covers

Description

27

4

Keyboard Cover

Description

Speaker Panel1

Ref.

19

Ref.

Cpu & Sound Generator Board

Power Amplifier & Supply Board

Revolving Cover

Control Panel Assembly

Mains Filter Board

Revolving Keyboard Cover
Front Cross Bar

Cabinet Chassis

Front Panel

Music Stand
Cover Stand

Speaker Box

3
2

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5

10

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6

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11

14
13
12

Cover

15

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20

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Mains Assembly

Power Switch

Transformer Assembly

Description

37

Ref.

Tweeter Support
8" Woofer
Hinge For Music Stand

Tweeter Support

Cpu Board Support

Right Keyb. Cheek Block

3.5" Disk Drive

6" Woofer

Dome Tweeter Speaker

Cone Tweeter Speaker

Accessories Support

Keyboard Assembly

Left Keyb. Cheek Block

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50

Heatsink Net

Adhesive Felt

Speaker Net

Black Cloth

51

6

Controls & Midi I/O Board

Cross-Over Board

Phones Assembly

18

16

17

35
34

36

31

Disk Drive Support

Cheek Support

Drive Support Stand

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Hard Disk

22

38

32

46

2

10

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44

39

20

13

32

24

49

11

31

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45

1

View A

3

26

18

View A

19

21

12

29

525354

36

View B

23

27

View C

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30

5

26

15

14

16

25

7

9

30

37

34

35

View B

10
47

48
50

8

51

View C

17

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