SERVICE MANUAL

Index & Warnings
O p e n in g In s tr u c tio n s
2
3
4
5
6
7
8
A u to te s t C h a r t, B lo c k D ia g r a m
P o w e r A m p lifie r & S u p p ly B o a r d
K e y b o a rd C o n ta c t B o a rd s & K e y b o a rd In te rfa c e B o a rd
C o n tr o ls P a n e l B o a r d
C p u & S o u n d G e n e ra to r B o a rd
S p a r e P a r t L is t
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 MANUAL
Notice
S e r v ic e m u s t b e
c
p e r io d w ill fo r fe it th
F o r a c o r r e c t o p e r a tio n o f th e
T o im p r o v e t h e d e v ic e 's s p e c
Schematic Diagrams
a r r ie d o u
e r ig h t to
in s tr u m e
ific a tio n s
t b
g u
n t,
, th
y q u
a ra n
a fte
e s c
a lifie d p e r s o n n e l o n ly .A n y ta m p e r in g c a r r ie d o u t b y u n q u a lifie d p e r s o n n e l d u r in g th e g u a r a n te e
te e .
r h a v in g s w itc h e d o ff, b e c a r e fu l to w a it a t le a s t 3 s e c o n d s b e fo r e s w itc h in g o n a g a in .
h e m a tic d ia g r a m s m a y b e s u b je c t to c h a n g e w ith o u t p r io r n o tic e .
Schematic
Notes
A ll c o m p o n e n ts m a r k e d
b y th is s y m b o l h a v e s p e c ia l s a fe ty c h a r a c te r is tic s , w h e n r e p la c in g a n y o f th e s e c o m p o n e n ts
m a n u f a c t u r e r 's s p e c if ie d p a r t s .
T h e ( µ ) m i c r o s y m b o l o f c a p a c i t a n c e v a l u e i s s u b s t i t u t e d b y U . T h e ( Ω) o m e g a s y m b o l o f r e s i s t a n c e v a l u e i s s u b s t i t u t e d b y E .
T h e e le c tr o ly tic c a p a c ito r s a r e 2 5 V d c r a te d v o lta g e u n le s s o th e r w is e s p e c ifie d . A ll r e s is to r s a r e 1 /8 W u n le s s o th e r w is e s p e c ifie d .
CODE : 270176
S o ld e r in g p o in t.
S u p p ly v o lta g e .
M a le c o n n e c to r .
L o g ic s u p p ly g r o u n d .
F e m a le c o n n e c to r .
A n a lo g s u p p ly g r o u n d .
M /F fa s to n c o n n e c to r.
S ig n a l g r o u n d .
T e s t p o in t.
C h a s s is g r o u n d .
u s e
o n ly
ATTENTION
O b s e r v e p r e c a u tio n s w h e n h a n d lin g
e le c tr o s ta tic s e n s itiv e d e v ic e s
F la g jo in e d w ith o n e o r m o r e fla g s w ith th e s a m e s ig n a l n a m e in s c r ib e d .
1H
H2
TEST
Start
AUTOTEST CHART
OPERATIONS
Turn on instrument while holding
pressed "A.S.B." button.
DISPLAY
All REVERB and DSP EFFECT leds are flashing.
LED
Press "A.S.B." button.
REVERB-HALL led go on.
Press "A.S.B." button again
All leds go on.
Buttons
Press "A.S.B." button
Only "A.S.B." button led is on.
Press all panel buttons one by one
except "A.S.B." button
Pedals
Press "A.S.B." button
Press left pedal [SOFT]
Press center pedal [SOSTENUTO]
Every button pressed must light coresponding led.
REVERB-HALL led is on and REVERB-STAGE led is
flashing.
The first 4 leds starting from PIPE ORGAN button are
on with pedal pressed, off with pedal released.
The next 4 leds up to EL.BASS button are on with
pedal pressed, off with pedal released.
The 8 leds of presets from CONCERT GRAND to
Press right pedal [DAMPER]
MIDI IN
& OUT
HARPSI progressively go on with increased pedal
pressure.
Press "A.S.B." button
Loop the two MIDI connectors with a
single MIDI cable.
REVERB-HALL and STAGE leds are on and REVERBROOM led is flashing.
If a loop is verified all leds from CONCERT GRAND to
HARPSI go on. If you disconnect the loop, all leds go
off.
All REVERB leds go on and DSP EFFECT PHASER
led flashes. A 1000 Hz sinusoidal tone must sound.
Sinus Test
Press "A.S.B." button
TRANSPOSE +/- buttons should slightly modify
frequency within range 10 - 2756 Hz if pressed and
instantly released. Move the VOLUME to set the
output level.
This test signal is useful to check power amplifier and
speakers.
Exit
Repeat
Press "A.S.B." button
Press and hold "A.S.B." button until
starting display shows.
Press "A.S.B." button to stop.
Note
DSP EFFECT PHASER led remain on confirming end
of test.
Autotest starts again.
The instrument is ready to play.
During autotest, keyboard does not respond and volume level is fixed .
The autotest operations can be performed only in the sequence specified above.
During test all normal keyboard functions are disabled.
At the end of autotest a memory reset takes place. A loud "click" during reset is normal.
3H
H4
5H
H6
7H
SPARE PARTS
LEGEND
EU
=
US
=
SPECIFY EUROPE VERSION
SPECIFY UNITED STATES VERSION
ACCESSORIES
271041
271042
OWNER'S MANUAL (EU)
OWNER'S MANUAL (US)
151128
160201
160202
160209
160210
150160
150161
150162
**
**
**
**
**
**
**
**
LAST C KEY
NATURAL KEYS RETURN SPRING (EU)
SHARP KEYS RETURN SPRING (EU)
NATURAL KEYS RETURN SPRING (US)
SHARP KEYS RETURN SPRING (US)
12 KEYS SNAP STRIP
13 KEYS SNAP STRIP
SNAP ACTING FOR KEY
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
HEAT SINK
LEFT AMPLIFIER SUPPORT
RIGHT AMPLIFIER SUPPORT
TO 220 HEAT SINK
9 CONTACTS VERTICAL MALE CONNECTOR
6 CONTACTS VERTICAL MALE CONNECTOR
6 CONTACTS VERTICAL MALE CONNECTOR
3 CONTACTS P=10mm VERTICAL TERMINAL BLOCK
2 WAYS 12V 5 A RELAY
FUSE CLIP
FUSE T 2A 5x20mm (EUROPE VERSION)
FUSE T 3,15A 5x20mm (EUROPE VERSION)
FUSE T 2A 6,3x32 (U.S. VERSION)
FUSE T 3,15A 6,3x32 (U.S. VERSION)
MC33078P LOW NOISE DUAL OP. AMP.
L4960 SWITC.REGUL.POS 2,5A
7812 12V 1A VOLTAGE REGULATOR
7912 -12V 1A VOLTAGE REGULATOR
STK4181 HYBRID 2x40W STEREO POWER AMPLIFIER
J-FET BSY 176 TRANSISTOR
BC173C NPN TO92 25V 0,1A TRANSISTOR
KBL02 4A 200V RECTIFIER BRIDGE
100V 6A RECTIFIER BRIDGE
1N4002 RECTIFIER DIODE
1N4148 RECTIFIER DIODE
*
*
*
*
**
**
**
**
**
**
**
**
AUX & MIDI I/O BOX
BOX FIXING
HOLE CLOSER
AUX & MIDI I/O BOARD (PCB# 310538)
6 CONTACTS VERTICAL MALE CONNECTOR
STEREO JACK WITH SWITCH
6 POLES DIN SOCKET
5 POLES DIN SOCKET
74HC04 HEX INVERTER
6N138 PHOTOCOUPLER
BC307 PNP TO92 40V 0,1A TRANSISTOR
1N4148 SIGNAL DIODE
*
*
*
**
**
**
HEAD-PHONE SOCKET BOX
BOX FIXING
PHONES BOARD (PCB# 310513)
6 CONTACT VERTICAL MALE CONNECTOR
STEREO JACK SLIM SOCKET
STEREO JACK SOCKET
730441
ASSEMBLY
720408 PEDAL ASSEMBLY
070556 *
20K-B POTENTIOMETER
171262 *
POTENTIOMETER SUPPORT
171263 *
PEDAL RETURN SPRING
190181 *
METAL PEDAL
210016 *
BLACK FELT
340274 *
STOP PEDAL RUBBER
171261 *
CHASSIS SUPPORT
340105 *
CHASSIS
130272 *
PEDAL CABLE
810168 *
REED SWITCH BOARD (PCB# 310272)
110243 *
REED
652851 WOODEN LEFT SIDE
652850 WOODEN RIGHT SIDE
340821 MUSIC STAND STOP
340807 SUPPORT FOR KEYBOARD SLOPE
220107 WOOFER
220087 TWEETER
210248 WOOFER GASKET
171352 TWEETER SUPPORT
171331 LEFT COVER FIXING
171330 RIGHT COVER FIXING
110362 MAINS SWITCH 4A 250V EU/US
MISCELLANEOUS PARTS
660401 TOP FIXING
660402 REFLEX HOLE GRID
660404 SPEAKER PROTECTION GRID
660405 HEAT SINK PROTECTION GRID
660407 ACOUSTIC CABINET BAR FIXING
710334 WOODEN STAND (EUROPE VERSION)
710342 WOODEN STAND (U.S. VERSION)
660406 MUSIC STAND SUPPORT
660403 MUSIC STAND HINGE
170585 METAL FOOD
WOODEN PARTS
260870
260867
260858
260857
260854
260853
260852
*
*
*
*
*
*
*
COVER
TOP
RIGHT LEG
LEFT LEG
PEDAL BAR
MUSIC STAND
INNER BAR
100738
100605
010726
141018
141011
141918
*
*
*
*
*
*
100740VALIS CPU (STARTS FROM 01/96)
74HC125 QUAD 3 STATE NON IVERTING BUFFER
19.2 MHZ CERAMIC RESONATOR WITH CAP.
20 CONTACTS FEMALE CONNECTOR
6 CONTACTS FEMALE CONNECTOR
2 CONTACTS MALE CONNECTOR
720417
720451
810552
340764
340211
080103
810551
340212
340211
500065
500066
151119
151120
151121
151122
151123
151124
151125
151126
151127
KEYBOARD ASSEMBLY (EUROPE VERSION)
KEYBOARD ASSEMBLY (U.S. VERSION)
*
39 CONTACTS LEFT BOARD FOR DYNAMIC KEYBOARD (PCB# 310531)
**
3 DUAL CONTACTS RUBBER STRIP
**
12 DUAL CONTACTS RUBBER STRIP
**
1N4148 100mA 75V SIGNAL DIODE
*
49 CONTACTS RIGHT BOARD FOR DYNAMIC KEYBOARD (PCB# 310530)
**
13 DUAL CONTACTS RUBBER STRIP
**
12 DUAL CONTACTS RUBBER STRIP
*
MECHANICAL KEYBOARD ASSEMBLY (EU)
*
MECHANICAL KEYBOARD ASSEMBLY (US)
**
C KEY
**
D KEY
**
E KEY
**
F KEY
**
G KEY
**
A KEY
**
B KEY
**
SHARP KEY
**
FIRST A KEY
760995
KEYBOARD INTERFACE BOARD (PCB# 315024)
KEYBOARD ASS'Y
H8
171350
171342
171341
170716
140352
140351
140323
140010
110304
110119
110010
110003
110083
110061
100919
100900
100045
100043
100039
090856
090182
080605
080171
080156
080103
POWER AMPLIFIER & SUPPLY BOARD (PCB# 310518)
730442
652855
171329
150474
730460
140351
140217
140216
140212
100602
100035
090192
080103
AUX & MIDI I/O ASSEMBLY
730459
652854
171327
730440
140327
140217
140207
PHONES ASSEMBLY
MAINS ASSEMBLY
730475
730476
130277
130294
150021
770724
767987
768005
010719
020493
110011
110362
140010
230565
110011
110083
MAINS ASSEMBLY (EU)
MAINS ASSEMBLY (US)
*
MAINS CORD (US)
*
MAINS CORD (EU)
*
CORD LOCK
INTERNAL MAINS CABLE ASSEMBLY
MAINS FILTER BOARD (PCB# 315016)(EU)
MAINS FILTER BOARD (PCB# 315016)(US)
*
2N2 250V 7A 20% AC LINE CAPACITOR “Y” FILTER
*
100N 250VAC MKP EMI CAPACITOR (IEC-UL-CSA)
*
FUSE CLIP 5x20mm (EUROPE VERSION)
*
FUSE CLIP 6.3x32mm (U.S. VERSION)
*
3 CONTACTS P=10 VERT TERMINAL BLOCK
*
2.5MH 250V 3A AC LINE FILTER
FUSE T 1A 5x20mm (EU)
FUSE T 2A 6.3x32mm (US)
TRANSFORMER ASSEMBLY
730373
230124
730216
230108
TRANSFORMER ASSEMBLY (EU)
*
TRANSFORMER 230V 120W
TRANSFORMER ASSEMBLY (US)
*
TRANSFORMER 115V 120W
CPU & SOUND GENERATOR BOARD
750996
140352
141011
141010
105006
105002
104013
104012
104010
104000
103010
103009
103007
103004
103001
101501
100920
100919
100075
090192
090182
081000
080241
010727
010704
550509
110282
*
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
*
*
CPU & SOUND GENERATOR (PCB# 315080)
9 CONTACTS VERTICAL MALE CONNECTOR
6 CONTACTS FEMALE CONNECTOR
4 CONTACTS FEMALE CONNECTORS
UP H8/3003 CPU SMD FC=16MHZ
DISP3 DIGITAL SOUND PROCESSOR
23C32000G WAVE FORM ROM1
23C32000G WAVE FORM ROM2
HM514280AJ-7 CMOS DRAM 256KX18
HM628128LPF STATIC RAM 1MB 70NS
74HC04 HEX INVERTER IN SMD SOP14 P=3,81
74HC02 QUAD 2 INPUT NOR GATE SOP14 P=3,81
74HC74 DUAL FLIP-FLOP
AD1865R SDP PCM D/A COUNVERTER
74HC08 QUAD 2-INPUT AND GATE
74AC377 OCTAL D FLIP-FLOP
LM 336B 2,5 VOLTAGE REFERENCE GENERATOR
MC33078P LOW NOISE DUAL OP. AMP.
LM311N LINEAR VOLTAGE COMPARATOR
BC307 PNP TO92 40V 0,1A TRANSISTOR
BC173C NPN TO92 25V 0,1A TRANSISTOR
1N4148 SIGNAL DIODE
5,6V 1W 5% ZENER
45.1584MHz QUARTZ RESONATOR
16 MHz QUARTZ RESONATOR
27C4002 PROGRAM EPROM
3,6V 60MAH RECHARGEABLE BATTERY
820421
820429
652241
652237
652236
340820
652848
660392
660394
810294
140520
100738
100607
100605
090192
090182
080748
080747
080103
141011
141010
140918
140872
730437
140874
070551
*
*
**
**
**
**
**
**
**
*
**
**
**
**
**
**
**
**
**
**
**
**
**
**
***
***
770722
840901
840850
840783
840782
840769
840768
SPEAKERS CABLE ASS'Y
9 Wires x 35cm FLAT CABLE (from POWER AMPLIFIER to CPU BOARD)
6 Wires x 5cm FLAT CABLE (from POWER AMPLIFIER to OUTPUTS BOARD)
6 Wires x 40cm FLAT CABLE (from CPU BOARD to CONTROL PANEL BOARD)
6 Wires x 35cm FLAT CABLE (from CPU BOARD to KEYBOARD)
4 Wires x 40cm FLAT CABLE (from OUTPUT BARD to CONTROL PANEL BOARD)
4 Wires x 10cm FLAT CABLE (from CPU BOARD to POWER AMPLIFIER
from CPU BOARD to OUTPUTS BOARD)
2 Wires x 30cm FLAT CABLE (from POWER AMPLIFIER BOARD to KEYBOARD
INT.)
CONTROLS PANEL ASS'Y
FRONT PANEL ASSEMBLY (EU) (Real Piano)
FRONT PANEL ASSEMBLY (US) (PianoVelle)
<PLAY-REC> RUBBER KEYPAD
2+4+8+8<DEMO...SOUNDS>RUBBERKEYPAD
4+1 <ASB-REVERB-DSP EFFECTS-TOUCH-KEY SPLIT> RUBBER KEYPAD
SLIDER KNOB
CONTROL PANEL
FRONT PANEL (EUROPE VERSION)
FRONT PANEL (U.S. VERSION)
CONTROLS PANEL BOARD (PCB# 310515/1)
MICROSWITCH
100740 VALIS CPU (STARTS FROM 01/1995)
74HC164 8BIT SIPO SHIFT REGISTER
74HC125 QUAD 3 STATE NON IVERTING BUFFER
BC307 PNP TO92 40V 0,1A TRANSISTOR
BC173C NPN TO92 25V 0,1A TRANSISTOR
GREEN LED
RED LED
1N4148 SIGNAL DIODE
6 CONTACTS FEMALE CONNECTOR
4 CONTACTS FEMALE CONNECTOR
2 CONTACTS MALE CONNECTOR
4 CONTACTS MALE CONNECTOR
VOLUME MODULE (PCB# 310507)
6 CONTACTS STRIP
10KE 30mm SLIDER POT.
WIRING CONNECTIONS
840767
840766
2 Wires x 10cm FLAT CABLE (from POWER AMPLIFIER to CONTROLS PANEL
B.)
840765
840738
840168
2 Wires x 20cm FLAT CABLE (from POWER AMPLIFIER to OUTPUTS BOARD)
4 Wires x 5cm FLAT CABLE (from RIGHT KEYBOARD to LEFT KEYBOARD)
6 Wires x 80cm FLAT CABLE (from POWER AMPLIFIER BOARD to PHONES
BOARD)
840762
20 Wires x 25cm FLAT CABLE (from RIGHT KEYBOARD to KEYB. INTERFACE
B.)
840761
20 Wires x 12,5cm FLAT CABLE (from LEFT KEYBOARD to KEYB. INTERFACE
B.)
Note:
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,
3) Module code,
4) Reference name,
5) Quantity number.