Akai Deep Impact SB1 User manual

SERVICE MANUAL 1
SB1
Functions: ......................... Programs:9 memorized preset sounds:DARK BUBBLE, HARDCORE, KITAROH BASS, BRIGHT
SYNTH, BRATS, FAT BOTTOM, MAJESTY, HOT SPACE, HICCUPS.
Program Up
Effect on/off
Connectors: ...................... INPUT (Input impedance: 500k ohms or more)
OUTPUT (Output impedance: 1k ohms or less)
DC IN (9 Volts)
PROGRAM DOWN for optional footswitch connection.
Controls:............................ INPUT LEVEL
PARAMETER
DATA
OUTPUT LEVEL
FOOTSWITCH x 2 (unlatch type) ON/OFF and PROGRAM UP.
Indicators: ......................... Input Level (LED x 3), Effect on/off (LED x 1), PROGRAM NO
(7 segment LED x 1), DATA (7 segment LED x 1)
Power requirements: ........ 9V DC/180mA, AC adaptor MP-9
Accessories: ..................... Operator’s Manual, AC adaptor MP-9
Dimensions: ...................... 140 (W) x 175 (D) x 61 (H)mm
Weight:............................... 750g
• Specifications are subject to change without notice.
SPECIFICATIONS
Synth Bass Processor
MODEL DEEP IMPACT SB1

SERVICE MANUAL
2
##
##
#SAFETY INSTRUCTIONS ##
##
#INFORMATIONS
SYMBOLS FOR PRIMARY DESTINATION
Unit destinations are indicated with letters as shown below.
Symbols Principal Destinations
A U.S.A
BU.K
C Canada
E Europe (except U.K)
J Japan
S Australia
V Germany
U Universal Area
Y* Custom version
1. Parts identified by the }symbol are critical for safety.
Replace them only with the parts number specified.
2. In addition to safety, other parts and assemblies are
specified for conformance with such regulations as those
applying to spurious radiation.
These must also be replaced only with the specified
replacements.
Examples : RF converters, tuner units, antenna selector
switches, RF cables, noise blocking capacitors,
noise blocking filters, etc.
3. Use specified internal wiring.Note especially :
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use specified insulating materials for hazardous live parts.
Note especially :
1) Insulation Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulation sheets for transistors
5) Plastic screws for fixing micro switches
5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc.), wrap
the ends of the wires securely around the terminals before
soldering.
6. Make sure that wires do not contact heat producing parts
(heat sinks, oxide metal film resistors, fusible resistors,
etc.).
7. Check that replaced wires do not contact sharp edged or
pointed parts.
8. Also check areas surrounding repaired locations.
9. Make sure that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.
SAFETY CHECK AFTER SERVICING
After servicing, make measurements of leakage-current or
resistance in order to determine that exposed parts are
acceptably insulated from the supply circuit.The leakage-
current measurement should be done between accessible
metal parts (such as chassis, ground terminal, microphone
jacks,signalinput/outputconnectors, etc.)and theearthground
through a resistor of 1500 ohms paralleled with a 0.15 µF
capacitor, under the unit’s normal working conditions.
The leakage-current should be less than 0.5 mA rms AC.The
resistance measurement should be done between accessible
exposed metal parts and power cord plug prongs with the
power switch (if included) “ON”. The resistance should be
more than 2.2 M ohms.

SERVICE MANUAL 3
SUPPLEMENTARY INFORMATION
Points to be checked before making repairs
In order to protect PROGRAM data, always be sure to make a memo of the PROGRAM data before making repairs.
Caution: When the DATA knob is turned to change the PARAMETER on the SB1, the new data will automatically be
memorizedintheF-ROM,canceling the previousdatavalue. Thereisnoway to back up SB1 parametervalues externally.
Please refer to the following chart.
(Example)
About the SB1 test mode
Thistestmodeis used to checkthat themicrocomputer(IC3HD6433642RB42H) iscorrectly recognizing the switching
operation of the DATA knob, and to make adjustments if necessary.
Caution: All program data is reset to the initial factory presets when the TEST mode is entered.
Test mode operation
Set the PARAMETER control to the NOTE OFF LEVEL and, while pressing down on both foot switches, turn on the
power. (PlugintheDCpowerplug). Continuingpressingdownonthefootswitches. Themiddlesegmentofthe7segment
LEDwillflashandthenstopflashing. Oncethis segment has stopped flashing, turntheDataKnob(rotary encoder) in
the clock-wise direction until the LED display reads 0 – and the ON/OFF indicator lights red.
Points to be confirmed
Confirmation of each PARAMETER control position needs to be confirmed. This is done by turning the PARAMETER
controlandconfirmingthefollowing.Whenthe PARAMETERcontrolissettotheNOTEOFFLEVEL,“ 0 ”isdisplayedandwhen
turned toeachotherposition, the numberat each positionincreasesby 1.AtthelastLEVEL position,if“ A ”is displayed,
positions are correct.
Automatic adjustment of an incorrect display
While in the test mode, set the PARAMETER control to the NOTE OFF LEVEL and press down on the ON/OFF foot
switch for more than 2 seconds.The PARAMETER control will begin to turn taking approximately one second to
reach each position.The display will flash when the last position is reached and A – will appear to indicate that
automatic adjustment has finished.
• To cancel the test mode, unplug the DC power plug.
Cautions
• Be sure to confirm test mode operation when you have replaced the flash ROM (IC4 93LC46A) or Data knob
volume (VR501).
• Do not unplug the DC power cord while calibration is taking place.
PROG.No. PROG.No. PROG. No. PROG. No. PROG. No. PROG.No. PROG.No. PROG.No. PROG. No.
PARAMETER 123456789
NOTE OFF LEVEL
NOTE ON LEVEL
PRESET
ATTACK
DECAY
ENVELOPE DEPTH
DYNAMICS
CUTOFF
RESONANCE
BALANCE
LEVEL

REVISION
APPROVED CHECKED APPROVED DESIGNED
1st EDITION
A2  File No.12345678
A
B
C
D
E
F
G
H
1234567891011
A
B
C
D
E
F
G
H
2
3
1
84
IC201A
NJM4558L
7
6
5
IC201B
NJM4558L
R208
10K
R201
2.2M
C205
1/50
C210
1/50
C204
22/25
+9V-IC201
+9V
2
4
3
1
J201
HTJ-064-13H
J1
HTJ-020-05A
VCC
D1 1N4002
Vin
1
GND
2
Vout 3
IC1
NJM78M05FA
C1
220/10 C2 0.1 C5 0.1
C4
220/10
VCC
A+5V
LED+5V
D+5V
+9V
D+5V
D+5V
A+5V
A+5V
2
4
3
1
J203
HTJ-064-13H
2
4
3
1
J202
HTJ-064-13H
7
6
5
2
3
4
18
RL201
RY-12WK
VCC
D2 1SS133
C3
220/10
RELAY+9V
R213
220
C203
10/50
R209
220k
C207
2200P
C206
560P
RELAY+9V
D251 1SS133
C257
0.1
TR251
2SC3330
R258
2.2K
1 2 3 4
X2
5
X1
6
VSS
7
OSC1
8
OSC2
9
RES
10
P90/FVPP
11
P91
12
P92
13
P93
14
P94
15
IRQ0
16
P60 17
P61 18
P62 19
P63 20
P64 21
P65 22
P66 23
P67 24
P50/INT0 25
P51/INT1 26
P52/INT2 27
P53/INT3 28
P54/INT4 29
P55/INT5 30
P56/INT6 31
P57/INT7 32
VCC 33
P73 34
P74/TMRIV 35 P75/TMCIV 36
P76/TMOV 37
P77 38
P80/FTCI 39
P81/FTOA 40 P82/FTOB 41
P83/FTIA 42
P84/FTIB 43 P85/FTIC 44
P86/FTID 45
46 47 48
P22/TXD
49
P32/S01
50
P31/S11
51
P30/SCK1
52
P10/TMOW
53
P14/PWM
54
P15/IRQ1
55
P16/IRQ2
56
P17/IRQ3/TRG
57
AVCC
58
PB7/AN7
59
PB6/AN6
60
PB5/AN5
61
PB4/AN4
62
PB3/AN3
63
PB2/AN2
64
PB1/AN1 PB0/AN0 AVSS TEST
P87
P20/SCK3
PP21/RX0
IC3
HD6433642RB42H_SB1-1
NC
1VDD 28
A12
2WE 27
A7
3CE2 26
A6
4A8 25
A5
5A9 24
A4
6A11 23
A3
7OE 22
A2
8A10 21
A1
9CE 20
A0
10 DQ7 19
DQ0
11
DQ1
12
DQ2
13
VSS
14
DQ6 18
DQ5 17
DQ4 16
DQ3 15
IC102
HM6264BLFP-8LT
GND
1VCC 20
SG-A.
2S6 19
SG-B.
3S5 18
SG-C.
4S3 17
SG-D.
5S2 16
SG-E.
6S1 15
SG-F.
7S7 14
SG-G.
8S8 13
SG-P.
9S4 12
GND
10 DISP 11
IC401
HD74HC574FP
114
213
312
411
510
6 9
7 8
IC5
HD74HC74FP
TSTI1
1
OPCL
2
PDAD
3
PDDA
4
PD
5
RST
6
TSTI01
7
TSTI02
8
TSTI03
9
DVB1
10
DVB2
11
SDIN2
12
SDAD
13
SDOUT2
14
SDDA
15
SDDA2
16
SDOUT3
17
SDOUT1
18
SDIN1
19
SMODE
20
BCLK
21
LRCK
22
CLK0
23
DVDD1
24
DVSS1
25
XTI 26
XTO 27
TSTI2 28
CS 29
WRQ 30
DVSS2 31
DVDD2 32
SCLK 33
SI 34
WRDY 35
DRDY 36
SO 37
CASRF 38
RASCE 39
WE 40
A16 41
A15 42
A14 43
A13 44
A12 45
A11 46
A10 47
A9 48
DVSS3 49
DVDD3 50
A8 51 A7 52 A6 53 A5 54 A4 55 A3 56 A2 57 A1 58 A0 59
OE 60
IO0 61 IO1 62 IO2 63 IO3 64 IO4 65 IO5 66 IO6 67 IO7 68
DVSS4 69
DVDD4 70
DZFSET 71
DVSS5 72
DVDD5 73
DVB3 74 DVB4 75
DZF2
76
DZF1
77
NC1
78
AVB1
79
AOUTR2
80
AOUTL2
81
NC2
82
AOUTR1
83
AOUTL1
84
VRDAL
85
AVSS1
86
AVDD1
87
VRDAH
88
NC3
89
AINR-
90
AINR+
91
AINL-
92
AINL+
93
VCOM
94
VRADL
95
AVSS2
96
AVDD2
97
VRADH
98
AVB2
99
NC4
100
IC101
AK7712AVT
CS
1VCC 8
CLK
2NC 7
DI
3NC 6
DO
4GND 5
IC4
93LC46A
NC
1NC 8
NC
2VDD 7
NC
3OUT 6
GND
4CT 5
IC2
M51953BFP
e
df
c
g
b
a
DPY
1
2
3
4
5
6
7
a
b
COM
c
dp
d
e
8COM
dp
9
10 f
g
D406
SA56-11SRWA
e
df
c
g
b
a
DPY
1
2
3
4
5
6
7
a
b
COM
c
dp
d
e
8COM
dp
9
10 f
g
D405
SA56-11SRWA
GND
1VCC 20
SG-A.
2S6 19
SG-B.
3S5 18
SG-C.
4S3 17
SG-D.
5S2 16
SG-E.
6S1 15
SG-F.
7S7 14
SG-G.
8S8 13
SG-P.
9S4 12
GND
10 DISP 11
IC402
HD74HC574FP
R6
4.7K
1
2
3
4
P1 B4B-PH-K
R8
2.2K
R10 2.2K
R9 2.2K
C14
2.2/50
C15
2.2/50
C13
0.1
1 2 3 4 5 6
P3
B6B-PH-K
1
2
3
4
W901 WIRE_ASSY_L8012(3)PH_4P
1 2 3 4 5 6
W1
WIRE_ASSY_L8014(1)SAN-PH_6P
1
2
3
4
J205 53290-0410_4P
1
2
3
4
J204 53290-0410_4P
1
2
3
4
P501 52418-0410_4P
1
2
3
4
P601 52418-0410_4P
SW901
PROGRAM SW902 ON/OFF
3 12
SW601
EC11B15202
1 2 3 4 5 6 7 8 9 10 11 12 13 14
P2
B14B-PH-K
1 2 3 4 5 6 7 8 9
10 11 12 13 14
W201
WIRE_ASSY_L8014(2)SAN-PH_14P
1
2
3
4
5
6
7
8
W202 WIRE_ASSY_L8014(3)SAN_PH_8P
1
2
3
4
5
6
7
8
P201 B8B-PH-K
2
3
1
84
IC251A
NJU7032M
76
5
IC251B
NJU7032M
TR201
2SK2880_C,D,E
C201
0.01
R202
470
R203
1.5M
R204
2.2K
R212
270
C211
220/10 C202
1/50
R210
22K
R211
1K
C208
1000P
C209
2.2/50
+9V
R358 4.7K
R357
4.7K
R359 4.7K
C356
0.01
R260
2.2K
R259
2.2K C258
0.1
C259
2.2/50
D+5V
+9V
C256
220/10
C251
1/50
C252
10/50
R251
100K
R253
4.7K
R252
68K
D+5V
D-GNDD-GND
C116
0.1
D-GND
A[9]
A[10]
A[11]
A[12]
A[12]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
D[0]
D[1]
D[2]
A[8]
A[9]
A[11]
A[10]
D[7]
D[6]
D[5]
D[4]
D[3]
A[0] A[1] A[2] A[3] A[4] A[5] A[6] A[7] A[8] D[0] D[1] D[2] D[3] D[4] D[5] D[6] D[7]
D-GND
D+5V
C106
0.1
C104
15P C105 15P
X2
18.432MHz
D-GND D-GND
D-GND
DRDY
WRDY
H8_DSP
SCK
NWRQ
NCS
D-GNDD-GND
D-GND
C102
0.1
C101
220/10
A+5V
C103
0.1
D-GND
D+5V
C108 0.1 C107 220/10
A+5V
C109
0.1
A+5V
A+5V
C115
0.1
C111
0.1
C110
220/10
C113 10/16
C114 0.1
C112
1000P
WRDY
DRDY NWRQ NCS
H8_DSP
SCK
D+5V
C10 220/10
C11
0.1
D-GND
VCOM
VCOM
A+5V
R256 180K
R257
2K
R255 130K
R254
1.5K
C254
1/50
C255
22/25
C253
0.1
SG-G
SG-F
SG-E
SG-D
SG-C
SG-B
SG-A
ON/OFF-D
MIN-D
MID-D
MAX-D
D+5V
D-GND
D-GND
R2 1M
X1 10MHz
C8
15P C9 15P
D-GND
2
3
1
84
IC301A
NJM4558L
76
5
IC301B
NJM4558L
+9V.
1 3 5 4
2
VR301 RK09L1140_104A
1 3 5 4
2
VR351
RK09L1140_104A
TR351
2SC3330
C303
1/50
C351
1/50
+9V.
C301
10/16
R302
220
R352 10K
C352 100P
C354
0.047
C353
10/16
R355 560
R354
10K
R353
470K
R351
220K
R301
220K
C302
10/16
+9V.
R420 1.5K
R419 1.5K
R418 1.5K
R417 1.5K
R416 1.5K
R415 1.5K
R414 1.5K
R413 1.5K
R412 1.5K
R411 1.5K
R410 1.5K
R409 1.5K
R408 1.5K
R407 1.5K
R406 1.5K
R405 1.5K
S2-6
S2-5
S2-3
S2-2
S2-1
S2-7
S2-8
S2-4
S2-1
S2-2
S2-3
S2-4
S2-5
S2-6
S2-7
S2-8
S1-6
S1-5
S1-3
S1-2
S1-1
S1-7
S1-8
S1-4
S1-1
S1-2
S1-3
S1-4
S1-5
S1-6
S1-7
S1-8
LED+5V.LED+5V.
LED+5V.LED+5V.
LED-GND.LED-GND.
SG-G.
SG-F.
SG-E.
SG-D.
SG-C.
SG-B.
SG-A. SG-A.
SG-B.
SG-C.
SG-D.
SG-E.
SG-F.
SG-G.
SG-G. SG-F. SG-E. SG-D. SG-C. SG-B. SG-A.
LED+5V.
LED-GND.
D404 L-934-SRD-G
D403 L<-934SYD
D402 L-934SGD
D401
L-934SRD-G
1 3
2
VR501 RL0971110_103B
D+5V_3
D+5V_3
D-GND_3 D-GND_3
D+5V_4
D+5V_4 D+5V.
D-GND.
R402
680 R403 680 R404
680
R401
680
LED+5V. LED+5V. LED+5V.
LED+5V.
D-GND.
D+5V.
C355
0.1
D-GND.
D-GND.
D+5V.
SG-G SG-D SG-B SG-E SG-F SG-C SG-A MIN-D MAX-D MID-D DISP2 DISP1
LED-GND
LED-GND
LED+5V
LED+5V
ON/OFF-D
D+5V
D-GND
D-GND
D-GND
D+5V
D-GND
D+5VD+5V
D-GND
ON/OFF
PROGRAM
D-GND
C12
22/25
D-GND
R5 1K
PROGRAM
ON/OFF
D+5V
D-GND
D+5V
R11
47K
D+5V
R1
10K
C7
1/50
C6
0.1
D-GND D-GND
D+5V
D+5V D+5V
R4
100K
R3
12K
D+5V
D+5V
+9V-IC201
R205
39K
R206
150K
R101
470
R207
10K
R7
2.2K
D-GND
D-GND
LED-GND
LED-GND
D-GND
LED-GND
R263
1K
R261
4.7K
R262
2.2K C260 22/25
R12
220
C16
0.01(MYLER)
D-GND
R214
560
D201 HZS5C1
+9V
Vin
1
GND
2
Vout 3
IC6
NJM78L05A
R13
33/2W
C17
1000/10
+9V
R801
12K
D+5V
LED+5V. LED+5V.
L8014A501B
PC DISPLAY
PC MAIN
L8014A501A
L8014A501C
L8014A501D
SB1
PC(#)SB1
SCHEMATIC DIAGRAM
L8014A901
T.WATABE
2000, 6, 30
NOTE: UNLESS OTHERWISE SPECIFIED
ALL RESISTORS IN OHMS 1/6W
ALL CAPACITORS IN uF. P=pF
ALL ERECTROLYTIC CAPACITORS IN uF/WV
PC MODE VR
PC ENCODER
R360
4.7K
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREFVREF
+9V
OUTVR-OUT
GND
INVR-IN
GND
INVR-OUT
OUTVR-IN
EC-A EC-B MODE-VR D+5V
MODE-VR

5

6

SERVICE MANUAL 7
PARTS LIST
HOW TO USE THIS PARTS LIST
1. This Parts List lists those parts which are considered necessary for repairs.
2. Parts not shown in the Parts List will not in principle be supplied.
3. How to read the Parts List.
The available PC Board Blocks are listed separately.
WARNING
}}
}}
}INDICATES SAFETY CRITICAL COMPONENTS. FOR CONTINUED SAFETY, REPLACE SAFETY CRITICAL
COMPONENTS ONLY WITH MANUFACTURER'S RECOMMENDED PARTS.
AVERTISSEMENT
}}
}}
}IL INDIQUE LES COMPOSANTS CRITIQUES DE SÉCURITÉ. POUR MAINTENIR LE DEGRÉ DE SÉCURITÉDE
L'APPAREIL, NE REMPLACER QUE DES PIÉCES RECOMMANDEES PAR LÉ FABRICANT.
ATTENTION
1. When placing an order for parts, be sure to list the Part No., Model No. and the description of each part.
Otherwise, the non-delivery of the part or the delivery of a wrong part may result.
2. Please make sure that Part No. is correct when ordering.
If not, a part different from the one you ordered may be delivered.
3. Since the parts shown in Parts List or Preliminary Service Manual may have been the subject of changes,
please use this Parts List for all future reference.
Symbols for primary destination
[A] : AAL (U.S.A) [S] : SAA (Australia)
[B] : BEAB (England) [U] : U/T (Universal Area)
[C]: CSA (Canada)
[E] : CEE (Europe) [V] : VDE (Germany)
[J] : JPN (Japan) [Y] : Custom
SP (Service Parts) Classification
These reference symbols correspond with
component symbols in the Schematic
Diagrams.
a) Mechanism Block
2.HEAD BASE BLOCK
SP (Service Parts) Classification
This number corresponds with the indi-
vidual parts index number in the figure.
Ref. No. Part. No. Description
1 BH-T2023A320A HEAD BASE BLOCK
2 HP-H2206A010A HEAD R/P PR4-8FU C
3 ZS-477876 PAN20↔03STL CMT
4 ZS-536488 BID20↔08STL CMT
5 ZG-402895 SP CS ANGLE ADJUST
b) PC Board
2.MAIN PC BOARD
Ref. No. Part. No. Description
IC1 EI-324536 IC HD14049BP
IC2 EI-336801 IC MB8841-564M
C1A EC-338399 C MMY V 223M 250AC [U,E,B,S]
C1B EC-350949 C MMY V 223M 250DC [J]
C1C EC-338397 C MMY V 223M 125AC [C,A]
X1 EI-318384 OSC X'TAL NC-18C

SERVICE MANUAL
8
4. PC FINAL ASSEMBLY BLK SB1
Ref. No. Part No. Description
1 SP-813027J PANEL MAIN SB1
2 SE-813036J WIND SEGMENT
3 SE-820327X SPACER SEGMENT
4 ZS-376521 BT BID30X08STL CMT
5 SW-812893J SW PUSH SB-221(METAL) 01-01
6 ZW-812439J SW120STL CMT
7 ZW-812440J PW122X160X050STL NI3
8 SP-812211J COVER BOTTOM (A)
9 SA-812237J FOOT
10 SK-812204J KNOB VOL
11 SK-813028J KNOB ENCODER
12 SK-813200J KNOB VOL D11.5
13-A }AX-812121X2 AC ADAPTER L8006 J (PLUG IN)
[J]
13-B }AX-812122X2 AC ADAPTER L8006 C,A (PLUG IN)
[A]
14 }AX-812123X2 AC ADAPTER L8006 E,V (CORD IN)
[E,V,B]
15 }EJ-428247N PLUG ADAPTOR ECPL01BKR5 BS5733
[B]
1. PC BOARD BLK SB1
Ref. No. Part No. Description
1 BA-L8014A020A PC(#) SB1 BLK SB1
PC(#) SB1 BLK CONSISTS OF FOLLOWING PC BOARDS
•PC MAIN BLK SB1
•PC DISPLAY BLK SB1
2. PC MAIN BLK SB1
Ref. No. Part No. Description
D1 ED-386225J D SILICON 1N4002 T26 100/1.0A
D2 ED-811455J D SILICON H 1SS133T-77 T26
D201 ED-393771J D ZENER H HZS5C1 T26
D251 ED-811455J D SILICON H 1SS133T-77 T26
D801 ED-811455J D SILICON H 1SS133T-77 T26
D802 ED-811455J D SILICON H 1SS133T-77 T26
IC1 EI-438318J IC NJM78L05AT1 T05
IC2 EI-431113J IC M51953BFP-73A FP73AT12E
IC3 EI-813039J IC HD6433640RA*** SB1-1
IC4 EI-813040J IC 93LC46AT-I/SN FP T08E
IC5 EI-428017J IC HD74HC74FP
IC101 EI-811878J IC AK7712AVT
IC102 EI-812883J IC HM6264BLFP-8LT
IC201 EI-403306J IC NJM4558L
IC251 EI-813022J IC NJU7032M FPT1T08
J1 EJ-812072J SOCKET DC HTJ-020-05A 1P
J201 EJ-812069J PHONE J HTJ-064-13H 6.3
J202 EJ-812069J PHONE J HTJ-064-13H 6.3
J203 EJ-812069J PHONE J HTJ-064-13H 6.3
RL201 EQ-813041J RELAY SIG RY-12WK 1TR 12V
TR201 ET-842477J TR FET 2SK2880 C,D,E T05
TR251 ET-362209 TR 2SC3330 S,T,U T05
X1 EI-812885J OSC X’TAL HC-49/U 10000KHz
X2 EI-811908J OSC X’TAL HC-49/U 18432KHz
3. PC DISPLAY BLK SB1
Ref. No. Part No. Description
100 SE-812672J SPACER LED L=8.5
200 SE-812673J SPACER LED L=12
D401 ED-812087J D LED L-934SRD-G RED
D402 ED-812086J D LED L-934SGD GREEN
D403 ED-813021J D LED L-934SYD YELLOW
D404 ED-812087J D LED L-934SRD-G RED
D405 ED-812088J D LED SA56-11SRWA
D406 ED-812088J D LED SA56-11SRWA
IC301 EI-403306J IC NJM4558L
IC401 EI-811085J IC HD74HC574FP
IC402 EI-811085J IC HD74HC574FP
TR351 ET-362209 TR 2SC3330 S,T,U T05
VR301 EV-812887J VR ROTARY RK09L1140 L12.5 A104
VR351 EV-812887J VR ROTARY RK09L1140 L12.5 A104
VR501 EV-813047J VR RT.RK0971110 L15 11D B103SP
SW601 ES-813048J SW ROTARY ENCODER EC11B202 L15

SERVICE MANUAL 9
FINAL ASSEMBLY BLK SB1
14
9
4
9
4
9
4
15
13
8
4
4
6
5
2
3
7
1
10
12
11

SERVICE MANUAL
10
1-3, Hiranuma 1-Chome, Nishi-Ku, Yokohama, Japan
SERVICE SECT. PHONE : [phone] FAX : [phone]
Printed Date : Oct 6, 2000
Printed in Japan
ABBREVIATIONS FORTHE SERVICE MANUAL
ABBREVIATION EXPLANATION ABBREVIATION EXPLANATION
MINI MINImum
MIX MIXer
MOD MODulation / MODulator
M.WHEEL Modulation WHEEL
OSC OSCillator
PLD Programmable Logic Device
RAM Random Access Memory
RD ReaD
REG REGulator
RESO RESOnance
RL ReLay
ROM Read Only Memory
SCSI Small Computer System Interface
S/H Sample and Hold
SIMM Single Inline Memory Module
SMPTE Society of Motion Picture & Television
Engineers
SW SWitch
THRU THRoUgh
TRANS TRANSpose
U Upper
VA Voltage Analog
VCA Voltage Controlled Amplifier
VCF Voltage Controlled Filter
VR Variable Resistor
VREF REFerence Voltage
WR WRite
AMP (Amp) AMPlifier
BBD Backet Brigade Diode
BCD Binary Code Decimal
B.DOWN Brake DOWN
B.UP Back UP
CE Chip Enable
CH CHannel
COMP COMParator
CONT CONTrol
CV Control Voltage
D/A Digital to Analogue
DIR DIRectory
DMA Direct Memory Access
DSP Digital Signal Processor
EG Envelope Generator
EXT EXTernal
FREQ FREQuency
HPF High Pass Filter
INH INHibit
INT INTerrupt
INV INVerter
LLower
LAN Local Area Network
LFO Low Frequency Oscillator
MAX MAXimum
MEMO MEMOry
MIDI Musical Instrument Digital Interface