Circuit Diagram (Main 1/5) - Roland V-Synth XT Service Notes

MAY.2005

CIRCUIT DIAGRAM (MAIN 1/5)

fig.c-main1.eps
IC1
R91
R98
NIU
33.25MHz
LED1
NIU
Q1
NIU
R97
IC1
NIU
R1
66.5MHz
133MHz
C60 C61 C12
C11
C10
C9
C8
C7
C6
C5
C3
IC1
R214 R15
R16
R17
R18
R7
R8
R248
R12 R13
R9
R10
R11
R14
R3
R96
R19
C52
R35
R20
R21
RA1
R28 R27
R22
R26
R25
R24
R23
R33
R29
R30
R31
R34
R32
IC4
C59
R60
R61
C62
R50 R48 R46 R62
NIU NIU
R51 R49 R47 R45
R6
C51
R65
R64
R63
R2
R95
R66
R67
R68
C13
C63 R52 R54 R56 R58
NIU NIU NIU NIU
C58 C57 R53 R55 R57 R59
NIU
C48
C47
C46 RA16
C43
C42
C41
C40
C39
C38
C37
C36 RA17
C35
C34
C33
C32
C31
C30
C29
C28 RA18
C27
C26
C25
C24
C23
C22 R71
C21 R72
C20
C19
C18
C17
C16
C45
RA2
RA22
RA3
R40
R39
RA23
R74 R73
RA24
HD6417297BP267
RA25
RA26
RA19
RA20
RA21
RA43
IC2
R4 R86
R85
R84
R82
R87
C49
R83
R80
RA4
C54
R93
R42
R5
R92
R41
C50
IC3
SDRAM
C64
(256Mbitx4)
RA6 RA9
RA5 RA10
C2 C14
C15
C1 C75
C44
C4
IC5 IC9
RA11 RA7
RA12 RA8
C80 C83
C84
C79 C82 C69
C81
IC10 IC8
R70 R69
C65
C66
RA37
IC7
EEPROM (8kbit)
RA14
C93 C94
RA15
IC19
IC22
IC22
RA13
IC22
C96
IC25
IC19
IC25
R81 R88 R89 R90
R94
C95
R78
IC21
L1
L2
IC6
R43
R36
C56
D1
R44 C55
R37
C53
R38
C89
RA44
IC15
C91
RA31
IC17
C76 C67
C90
C68
C78
RA32
C77
IC16
C85
R76
R75
IC11
C92
C70 C73
RA27
C72 C74
RA42
C71
IC18
C86
RA28
RA41
IC12
R77
C87
R79 RA29
NIU
RA39
IC13
IC25
C88
RA30
RA40
RA38
IC14
V-SynthXT
RA36
RA33
RA34
RA35
41