GEM Powerstation SK760, Service Manual

Page: 18 / 29

J J J J J
18 18
18 18
18
A0 A3 A6 A7
A4
A5
A1
A6
A15
A13
A11
A12
A8
A14
A2
A0
A3
A7
D1 D1 D1 D2 D2 D2 D5 D5 D5 D0 D0 D0 D7 D7 D7 D6 D6 D6 D3 D3 D3 D4 D4 D4
D1 D2 D2 D5 D5 D0 D0 D7 D7 D6 D6 D3 D3 D4 D4
D1 D1 D1 D2 D2 D2 D2 D2 D5 D5 D5 D0 D0 D0 D0 D0 D7 D7 D6 D6 D6 D3 D3 D4 D4 D4 D4 D4
D1 D1 D2 D5 D0 D7 D6 D3 D4
D1 D1 D1 D2 D2 D2 D2 D2 D5 D5 D5 D0 D0 D0 D0 D0 D7 D7 D7 D6 D6 D6 D3 D3 D3 D4 D4 D4
A12
A8
A14
A10
A9 A8 A11 A15 A13 A10 A12 A14
A15
A13
A11
A9
A2 A4 A5 A1 A0 A3 A6 A7
D1 D1 D5 D5 D7 D7 D6 D6 D3 D3
A2
A4
A5
A9 A10
A1 A0 A3
A6
A7
D1
D5
D7
D3
D2
D0
D6
D4
D1 D5 D7 D6 D3 D4
DRW
CKD
APP.
DWG#
SCHEMATIC DIAGRAM
PCB#
DSK#
REV:
PART: ALL RIGHTS ARE RESERVED, NO COPIES
OR REPRODUCE THIS DOCUMENT WITHOUT
WRITTEN CONSENT BY GENERALMUSIC.
GENERALMUSIC S.p.A. ITALY
DIR
FQ
DIR
FQ
-12V
+12V
-12V
+5V
+5V
+5V
+5V
+5V
+12V
+12V
+12V
+12V
-12V
+5V
+5V
+5V
-30V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V +5V
D1
4148
DL47
C5
100N
1 2 3 4 5 6 7
CN3
DL81 DL67
7
14
IC6-C
74HC74
C32
100N
C20
100N
C8
100N
R10 1K
R39 8K2
R22 47K
R13 1K
VR101
5KB
1
2
3
4
SW31
DL77
DL44
DL87 DL94
DL59
DL92 DL90 DL89
DL61
DL86 DL91 DL79
DL99
DL95
DL3
DL93 DL85
DL12
DL98 DL49
1
2
3
4
SW36
1
2
3
4
SW21
1
2
3
4
SW73
1
2
3
4
SW78
1
2
3
4
SW86
1
2
3
4
SW91
1
2
3
4
SW98
1
2
3
4
SW87
1
2
3
4
SW58
1
2
3
4
SW67
1
2
3
4
SW63
3 4 5 6 10 11 12 13
9
8
2
1
Q1Q2 Q3 Q4 Q5 Q6 Q7 Q8
CP
A
B
8bit Sin Pout
SHIFT REGISTER
MR
IC3-A 74HC164
1
2
3
4
SW74
1
2
3
4
SW79
1
2
3
4
SW88
1
2
3
4
SW93
1
2
3
4
SW100
1
2
3
4
SW92
1
2
3
4
SW59
1
2
3
4
SW68
1
2
3
4
SW75
1
2
3
4
SW80
1
2
3
4
SW89
1
2
3
4
SW94
1
2
3
4
SW101
1
2
3
4
SW99
1
2
3
4
SW66
1
2
3
4
SW65
1
2
3
4
SW60
1
2
3
4
SW64
1
2
3
4
SW70
1
2
3
4
SW76
1
2
3
4
SW82
1
2
3
4
SW84
1
2
3
4
SW95
1
2
3
4
SW102
1
2
3
4
SW71
1
2
3
4
SW77
1
2
3
4
SW83
2
1
4
3
SW96
2
1
4
3
SW103
2
1
4
3
SW85
1
2
3
4
SW72
1
2
3
4
SW81
1
2
3
4
SW90
1
2
3
4
SW97
1
2
3
4
SW104
1
2
3
4
SW105
1
2
3
4
SW61
2
1
4
3
SW62
1
2
3
4
SW51
1
2
3
4
SW2
1
2
3
4
SW40
1
2
3
4
SW41
1
2
3
4
SW43
1
2
3
4
SW45
1
2
3
4
SW47
1
2
3
4
SW49
1
2
3
4
SW37
1
2
3
4
SW52
1
2
3
4
SW39
1
2
3
4
SW42
1
2
3
4
SW44
1
2
3
4
SW46
1
2
3
4
SW69
R14 5K6
1
2
3
4
SW50
4
8
IC1-C
TL072
C25
100N
7
14
IC9-B
74HC164
1
2
3
4
SW57
1
2
3
4
SW54
1
2
3
4
SW56
1
2
3
4
SW55
1
2
3
4
SW38
1
2
3
4
SW1
DL62 DL14 DL22 DL60
C17
100N
7
14
IC4-B
74HC164
DL68
R47
560E
DL5 DL7 DL16 DL24 DL34
R29
560E
DL19 DL10 DL1 DL38 DL65 DL55 DL50
R85
560E
DL106 DL108 DL150 DL132
R65
560E
DL117 DL125
DL20 DL29 DL56 DL58
DL96
DL33
DL73 DL71
DL156 DL23 DL15 DL6
DL41 DL2 DL11
DL88
DL48 DL39 DL8 DL17 DL25
DL40 DL9 DL18 DL26 DL36
DL69 DL70
DL27 DL37 DL57
DL114 DL63
DL84
DL130
DL142
DL64
DL123 DL115
DL133 DL124
R66
560E
R50
560E
R20
560E
R30
560E
R48
1K
R41
560E
R19
560E
R69
560E
R28
560E
R27
560E
R25
560E
R40
560E
C13
100N
R44
560E
R45
560E
R46
560E
R38
1K
R84
560E
R83
560E
R82
560E
DL140
DL151 DL126
DL147 DL139
DL122 DL129
DL146
DL148
DL136 DL134
DL158
DL137
DL107
DL143 DL152 DL127 DL102 DL119 DL111
DL118
DL113 DL149 DL109 R79
220E
DL162 DL160 DL120
DL110 DL101
DL135
DL74 DL30
DL145 DL138 DL128 DL121 DL103 DL31
DL66
DL104
DL105 DL116
VR11 22K
R86
560E
R89
560E
R81
560E
R88
560E
R87 1K
DL45
R43
560E
R53
560E
R55
560E
R15 10K
C2 100N
R34
10K
R36
10K
DL159
DL53
C6
100N
R12 10K
C7 100N
C9
100N
C3
100N
C1
100N
R6 1K
VR12 22K
R54
560E
R52
560E
DL78
R56
560E
R18
560E
R17
560E
DL28
R93 1K
C26
1N
DL72
R24 1K
C14
100N
C16
100N
C18
100N
C19
100N
C22
100N
C21
100N
C10
100N
C11
100N
C28
10U
7
14
IC5-B
74HC164
R59 1K
C23
10U
TR1
BC
173C
TR2
BC
173C
R60 1K
PITCH BENDER
10KB
C24
10U
R11 5K6
C12
100N
3 4 5 6 10 11 12 13
9
8
2
1
Q1Q2 Q3 Q4 Q5 Q6 Q7 Q8
CP
A
B
8bit Sin Pout
SHIFT REGISTER
MR
IC9-A 74HC164
DL80 DL144
DL112
S1
VR4
10KB
7
14
IC8-E
74HC86
7
14
IC2-B
74HC164
VR5
10KB
C29
100N
VR6
10KB
VR7
10KB
VR8
10KB
7
14
IC3-B
74HC164
VR9
10KB
VR10
10KB
VR1
10KB
VR2
10KB
MODULATION
10KB
1
2 3 4 5 6 7 8 9
D0 D2
AC2
220P X8
R7 1K
C4 100N
2
3
1
IC1-A TL072
R16
18K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CN4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CN5
DL157
R32 560E
1
9 8 7 6 5 4 3 2
AC1
220P X8
1
2
3
4
SW3
1
2
3
4
SW8
C27
100N
6
5
7
IC1-B TL072
C30
100P
1
2
3
4
SW13
C35
100P
1
9 8 7 6 5 4 3 2
AC3
220P X8
R8 100E
3 4 5 6 10 11 12 13
9
8
2
1
Q1Q2 Q3 Q4 Q5 Q6 Q7 Q8
CP
A
B
8bit Sin Pout
SHIFT REGISTER
MR
IC2-A 74HC164
R9 100E
DL32
3 4 5 6 10 11 12 13
9
8
2
1
Q1Q2 Q3 Q4 Q5 Q6 Q7 Q8
CP
A
B
8bit Sin Pout
SHIFT REGISTER
MR
IC4-A 74HC164
R102
560E
R92
100K
R97 100K
DL83
DL21
DL54
DL13
DL46
DL51 DL100
DL4
DL42
DL154 DL141 DL155
DL43 DL131 DL52
1
2
3
4
SW18
DL35
R101 22K
C33
100P
DL97
C34
100P
C38
820P
11
12
13 10
8
9
CK
D
R S
Q
Q
D FF
IC6-A 74HC74
1
2
3
4
SW25
3
2
1 4
6
5
CK
D
R S
Q
Q
D FF
IC6-B 74HC74
R95 1K
R1001K
11
12
13 10
8
9
CK
D
R S
Q
Q
D FF
IC7-A 74HC74
R98 22K
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN2
C37
820P
4
5
6
IC8-D 74HC86
1
2
3
IC8-A 74HC86
SW53
9
10
8
IC8-C 74HC86
C36
100N
1
2
3
4
SW33
1
2
3
4
SW4
1
2
3
4
SW9
1
2
3
4
SW14
R68
560E
3 4 5 6 10 11 12 13
9
8
2
1
Q1Q2 Q3 Q4 Q5 Q6 Q7 Q8
CP
A
B
8bit Sin Pout
SHIFT REGISTER
MR
IC5-A 74HC164
R103
560E
R94
220E
R96
220E
DL163 DL161 DL75 DL82 DL76
12
13
11
IC8-B 74HC86
3
2
1 4
6
5
CK
D
R S
Q
Q
D FF
IC7-B 74HC74
R58 1K
R57 1K
R35 8K2
1
2
3
4
SW48
1
2
3
4
SW19
1
2
3
4
SW22
1
2
3
4
SW26
1
2
3
4
SW29
1
2
3
4
SW34
7
14
IC7-C
74HC74
D2
4148
1 2 3 4 5 6 7
CN6
VR3
10KB
1
2
3
4
SW5
1
2
3
4
SW10
1
2
3
4
SW15
1
2
3
4
SW20
C31
100N
C39
100N
C15
100N
1
2
3
4
5
6
7
8
9
CN1
R23 47K
1
2
3
4
SW6
2
1
4
3
SW23
2
1
4
3
SW27
2
1
4
3
SW30
2
1
4
3
SW35
1
2
3
4
SW11
1
2
3
4
SW16
1
2
3
4
SW28
DL153
1
2
3
4
SW7
1
2
3
4
SW12
1
2
3
4
SW17
1
2
3
4
SW24
1
2
3
4
SW32
+
DRUMS
LEFT SIDE
G.BOCCATO
CONTROLS PANEL BOARDS
550185
+
BOARD
F2
F3
H.D. LED
BASS ACC 1/3
25/02/99
ACC 4/6 LOWER 2 LOWER 1 UPPER 2 UPPER 1 M.VOL. MC/LINE
CONTRAST
DIAL
-
-
INTRO
JAZZ US.TRAD TRAD 1 TRAD 2 LATIN 1
CHASSIS
GROUND
LATIN 2
MOD. CENTER ADJ.
USER 3 USER 4
PITCH CENTER ADJ.
LEFT CONTACTS MYLAR STRIP 140527
DIAL
SONG.P
140528 RIGHT CONTACTS MYLAR STRIP
P.GROUPS 5 P.GROUPS 6 P.GROUPS 7
KEY START
ENDING
D.HOLD
ST.LOCK
P.GROUPS 1 P.GROUPS 2 P.GROUPS 3
FILL
ENTER
P.GROUPS 8 P.GROUPS 4
UNDO D.HOLD KEY PAD 1/EFFECTS 4/CNT/PADS 2/MIDI 3/MIXER RECORD ST/SONG SCORE
SEQUENCER
7/ST/SONG 8/OPTION 9/GENERAL 5/T. SPLITS SONG STOP PLAY
SEQUENCER
-/DEMO 0/PRELOAD +/DISK 6/SOUND
BASS
KEY PAD
GUITAR
ORGAN
STRINGS ENSEMB
RECORD ST/SONG SONG
REED
BRASS
PIPE
SYN LD.
SYL PAD SYL SFX
ETHNIC
PERC.
SFX
PAD 2 PAD 1 PAD 3 PAD 4
OCTAVE - TRANSP b TRANSP
#
PIANO
VAR.1
STYLE REAL TIME
VAR.4 VAR.3 VAR.2
FILL
FILL
DIAL
ESCAPE
INTRO
START/STOP
PIPE
ARRANGE MEMORY ARRANGE ON/OFF LOWER MEMORY ARRANGE MODE SOLO TEMPO LOCK MIXER LOCK LOWEST SINGLE BASS TO ON/OFF
STOP
PLAY
STYLE REAL TIME
SEQUENCER
PRELOAD START
STORE PERF. EFFECTS BYPASS TCH PLAY HARMONY 8 BEAT 16 BEAT ROCK FUNK DANCE 1 DANCE 2
FADE I/O
EN_LED
USER 1
STOP
F4
F5
F6
F7
F8
TRACK SCROLL
A
B
C
D
E
F
G
H
RIGHT SIDE
TO INTERFACE
>
<
F1
ST.LOCK KEY START ENDING TRANSP b
1/1
TRANSP #
USER 2
315169/315113/CS032001
FILL FILL FILL VAR 3 VAR 2 VAR 1 VAR 4 FADE I/O ARR.MEMORY LOW. MEMORY ARR. MODE TEMPO LOCK MIXER LOCK BASS TO LOWEST
HARMONY ON/OFF
ARR.ON/OFF EFF.BYPASS SOLO SINGLE TCH PLAY STORE PERF. VOL.MIN VOL.MAX
PCB# 315169
HELP
810674 - CONTROLS PANEL BOARD
FROM C.P. INTERFACE BOARD CN1
FROM C.P. INTERFACE BOARD CN3
TO CONTROLS PANEL INT. BOARD CN2
VOLUMES
D2
D0
D6
D4
A12
A8
A14
A10
A4
A5
A1
A6
A2
A0
A3
A7
D1
D2
D5
D0
D7
D6
D3
D4
A15
A13
A11
A9
D1
D5
D7
D3
POT1
POT1
+5V +5V +5V
+5V
+5V
+5V
+12V
+5V
-12V
+5V
-12V
+5V
+5V +5V
+5V
+5V
+5V
+5V
-30V
+5V
+5V
+12V
+12V
-12V
TR2
BC173C
D14 4148
D15 4148
D16 4148
R2 100E
D11 4148
D4 4148
D3 4148
D12 4148
D7 4148
D8 4148
R3 100E
R4 100E
R6 100E
R5 100E
R1 100E
R36 100E
R37 100E
R47 100E
C13
100N
R48 100E
R27 100E
R26 100E
R9 10K
R53
560E
C32
100P
R62 1K
R40 1K
R41
100K
R55 1K
R51 1K
R17 1K
R20 1K
R19 1K
R23 1K
R16 1K
R22 1K
C7
100N
C16
100N
C29
100N
C25
100N
R15 1K
C23
100N
R39
100K
C10
100N
C8
100N
R28 100E
C5
100N
C3
100N
C4
100N
C6
100N
C9
100N
R61 1K
R60
10K
C17
100N
C18
100N
C28
100N
R43 1K
C27
100N
C26
100N
R14
3
K3
1 2 3 4 CN4
C30
100N
C1
100N
C31
33P
R45 1K
C21
100N
R38
100K
R57 1K
R50 1K
R12 10K
R31 1M
R63 100E
7
14
IC1-E
74HC125
R33 100E
R34 100E
R35 100E
TR3
BC
327
21
30
IC3-C
VALIS100740
R46 100E
R29 10K
R65 10K
R32
2K2
R25
2K2
R44
1
K
R49 100E
R52 100E
R10 3K3
R11 10K
R64 1K
R13 3K3
R59 1K
C19
100N
R66 1K
C14
100N
R24
3
K3
C24
100N
R42 100E
1
2 3 4 5 6 7 8 9
AR1
10K X8
R54 560E R56
10K
R8 330E
R58 560E
R7 330E
C22
100N
16 48
39 14
IC3-B
VALIS100740
9 8
10
IC1-C
74HC125
4
15
13
12
11
7
8 5
2
6
1
16
19
18
17
A0
A1
LE
MULTIPLEXER
DEMULTIPLEXER
A2
XC
X1
X2
X3
X4
X5
X6
X7
X0
E1
E2
IC4-A 74HC4351
TR1
BC327
2 3
1
IC1-A
74HC125
5 6
4
IC1-B
74HC125
12 11
13
IC1-D
74HC125
R18 1K
R30
100E
D13 4148
C39
100N
1
5 3 4 2
AR3 10K X4
4
15
13
12
11
7
8 5
2
6
1
16
19
18
17
A0
A1
LE
MULTIPLEXER
DEMULTIPLEXER
A2
XC
X1
X2
X3
X4
X5
X6
X7
X0
E1
E2
IC2-A 74HC4351
1
2 3 4 5
AR2 2K2 X4
XT1
20MHZ
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
CN2
1
3
5
7
9
11
13
15 16
14
12
10
8
6
4
2
CN6
1
2
3
4
5
6
7
8
9
10
11
12
CN5
C38
10U
C37
100N
C33
100N
C34
10U
C35
100N
C36
10U
C20
100N
R21
4
K7
C15
100N
C2
100N
9 10
20
IC4-B
74HC4351
9 10
20
IC2-B
74HC4351
22
23
24
25
26
27
28
29
1
2
3
4
5
6
7
8
9
10
11
12
13
15
17
18
20
19
38
37
36
35
34
33
32
31
40
41
42
43
44
45
46
47
49
50
51
52
53
54
55
56
64
63
62
61
60
59
58
57
P4,0/ADTRG//IRQ2
P4,1/IRQ1
P4,2/IRQ0
P4,3/RD
P4,4/WR
P4,5/AS
P4,6/CLK0
A0/P1,0
A1/P1,1
A2/P1,2
A3/P1,3
A4/P1,4
A5/P1,5
A6/P1,6
A7/P1,7
A8/P2,0
A9/P2,1
P5,0/TXD
P4,7/WAIT
P5,1/RXD
P5,2/SCK
A14/P2,6
A15/P2,7
FTOA/P6,1
FTIA/P6,2
TMRI0/FTIB/P6,3
TMO0/FTIC/P6,4
TMCI1/FTID/P6,5
TMO1/P6,7
TMCI0/FTCI/P6,0
A10/P2,2
A11/P2,3
A12/P2,4
A13/P2,5
MD1
MD0
EXTAL
XTAL
STBY
NMI
RES
TMRI1/FTOB/P6,6
P7,0/AN0
P7,1/AN1
P7,2/AN2
P7,3/AN3
P7,4/AN4
P7,5/AN5
P7,6/AN6
P7,7/AN7
D1/P3,1
D2/P3,2
D3/P3,3
D4/P3,4
D5/P3,5
D6/P3,6
D7/P3,7
D0/P3,0
IC3-A VALIS100740
1
2 3 4 5 6 7 8 9
AC1
47P X8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
EN_LED
CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DIR
FQ
CLK
SD
VEE
VLCD
HD_LED
CN3
D2 4148
D1 4148
D6 4148
D5 4148
D9 4148
D10 4148
C12
100N
C11
10U
PCB# 315113
FOOTSW2
VEE
GET_TXD
FQ
A0
A1
A2
A3
RXD3
+5V
NC
FROM CONTROLS PANEL BOARD CN2
PEDAL V.
MODULATION
MULTIPLEXER
KB
PEDAL V.
PEDAL3
BAUD RATE3
FOOTSW3
TO CONTROLS PANEL BOARD CN5
TO CONTROL PANEL BOARD CN4
FROM CPU & S.G. BOARD CN2
CONTROLS PANEL
PITCH BEND
TXD3
POT.9
POT8
POT7
POT6
POT5
POT4
POT3
M.VOL.
VOLUMES
HD LED
NEXT
PEDAL2
FOOTSW2
PEDAL1
FOOTSW1
RSTV
DIR
POT1
PEAK-1
LCD DISPLAY NEON-LAMP SUPPLY
FOOTSW3
FOOTSW1
700VAC
1c
8c
8c
C3 15P
3000V
0VAC
(300Vac w/load)
900c
C2 100N 160V
Q1
2SC2383
Q2
2SC2383
L1 1MH
R1 5K6
R2 5K6
R3 0E
SP1 0.5A FAST
C1 47U
+12V
GND
1
2
3
4
P1
SERVICE NOTE:
NC
NC
730246 - DC-AC CONVERTER BOARD
TO 240X64DOTS LCD DISPLAY
PCB CS032001
THE TECHNICAL SUPPORT IS CARRIED OUT ONLY
BY REPLACEMENT THE COMPLETE BOARD.
LGND
+12V
CONTROLS PANEL SUPPLY
PEAK-2
LGND
761135 - CONTROLS PANEL INTERFACE BOARD
GET_TXD
VLCD
FROM MIXER BOARD CN5
POT2
MODULATION
PITCH_BENDER
100740 - PERIPHERIAL CPU
RICCOBELLI
PANNELLI
5 SK760/880 (SWT)
+12V
R26
220E
+12V
R80
220E
+12V
R31
220E
+12V
R49
R37
R74
220E
+12V
220E
+12V
R99
220E
+12V
220E
+12V
R91
220E
+12V
R1
220E
+12V
R4
220E
+12V
R63
220E
+12V
R62
220E
+12V
R90
220E
+12V
R2
220E
+12V
R5
220E
+12V
R75
220E
+12V
R61
220E
+12V
R71
220E
+12V
R42
+12V
220E
R33
+12V
220E
R73
+12V
220E
R78
+12V
220E
R70
+12V
220E
R67
+12V
220E
R21
+12V
220E
R72
+12V
220E
R76
+12V
220E
R77
+12V
220E
R51
+12V
220E
R3
+12V
470E
R64
470E
+12V
(SWT version)