DSR-50/50P
4-37
4-38
JC-20 (MECHANISM CONTROL 2) SCHEMATIC DIAGRAM
• See page 4-15 for JC-20 printed wiring board.
• See page 4-148 for waveforms.
MECHANISM CONTROL 2
JC-20 (10/14)
NO MARK:REC/PB MODE
R:REC MODE
P:PB MODE
2.7
2.7
R0.8/P0.4
2.6
2.8
2.8
2.7
0
3.1
0
0
0
2.8
0
0
0
0
0
0
2.8
1.6
0
0
2.7
1.4
0
0
2.3
1.3
2.8
2.8
0
0
0.6
1.4
1.4
1.3
1.3
0
0
*
*
1.3
1.5
0.2
3
1.4
2.8
1.1
1.2
2.8
2.8
2.8
R0/P2.8
0
2.8
2.8
2.6
0
2.8
2.8
2.8
2.7
2.8
0
0
2.7
2.8
2.8
R2.5/P1.5
R2.1/P1.5
R2.2/P1.2
R1.4/P0.6
R0.9/P1.3
R1.2/P1.8
R2/P1.3
0.3
2.4
2.4
2.5
2.7
2.7
2.7
0
2.7
2.7
0
2.7
2.7
2.7
2.7
0
0
0
2.9
2.9
0
0.4
2.7
2.7
1.4
0.2
1.4
1.4
1.4
2.8
0.8
0.5
0.4
2.9
2.5
2.7
R0.8/P0.4
2.6
2.8
2.7
0
2.7
2.7
2.6
0.2
0
0
2.7
2.7
2.7
2.8
38
33
34
35
36
37
10p
C5008
X5001
20MHz
10p
C5009
MB91192PFF-G-119-BND-ER
IC5003
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
C5012
0.01u
AK6480AM-E2
IC5006
1
2
3
4
5678
0.01u
C5015
GND
J_3V
MODE_SI
MODE_SO
XMODE_SCK
XSYS_RESET
R5026
1k
0.001u
C5007
1k
R5033
1k
R5034
1k
R5035
47k
R5031
47k
R5030
47k
R5029
47k
R5028
100k
R5043
100k
R5042
100k
R5046
100k
R5045
1k
R5032
100k
R5047
100k
R5038
220k
R5041
47k
R5039
100k
R5018
100k
R5019
470k
R5020
470k
R5044
100k
R5040
4700
R5037
0.01u
C5014
1u
C5011
DRP
CHIME_VDD
1uH
L5002
CHIME_SCK
CHIME_SDA
CL5301
CL5302
CL5303
CL5304
CL5306
CL5308
CL5309
CL5311
CL5313
CL5314
CL5315
CL5316
CL5318
CL5319
CL5320
CL5321
CL5323
CL5324
CL5401
CL5402
CL5403
CL5404
CL5406
CL5407
CL5408
CL5410
CL5411
CL5412
CL5413
CL5414
CL5416
CL5417
CL5418
CL5419
10k
R5048
10k
R5025
100k
R5053
1k
R5055
100k
R5050
100k
R5051
100k
R5052
100k
R5049
VSP_SI
CAP_EVR
CONT_O
REEL_EVR
XCS_TRF
DRP_SI
SC_WD
XDRP_SCK
SWP
CONT_E
DRP_SO
XCS_TRX
ATF
XCS_MECHA
XCC_DOWN
1k
R5059
100k
R5060
CL5420
CL5421
CL5422
CL5423
CL5424
ONBOAD55
ONBOAD73
ONBOAD78
ONBOAD79
ONBOAD80
1k
R5061
1k
R5062
1k
R5063
1k
R5064
1k
R5065
DSWP
XCS_DSP
CL5747
XC_IN
CL5749
CL5750
50P
CN5005
1
MODE_SW_A
2
MODE_SW_B
3
MODE_SW_C
4
MODE_SW_D
5
GND
6
TAPE_LED_ON
7
TAPE_TOP
8
TAPE_END
9
GND
10
XC_IN
11
XCC_DOWN
12
L_CASSETTE
13
REC_PROOF
14
DEW_DET
15
GND
16
T_ELTN_ERR
17
S_ELTN_ERR
18
SREEL_FG
19
TREEL_FG
20
REEL_EVR
21
CAP_EVR
22
CHIME_SCK
23
CHIME_SDA
24
CHIME_VDD
25
GND
26
DRUM_ON
27
DRUM_FWD
28
DRUM_PWM
29
DRUM_FG
30
DRUM_PG
31
DRUM_MASTER_CLK
32
GND
33
CAP_ON
34
CAP_FWD
35
CAP_PWM
36
CAP_FG
37
GND
38
REEL_ON
39
REEL_FWD
40
REEL_PWM
41
REEL_M_FG
42
GND
43
CM(+)
44
CM(-)
45
CM_LIMIT_ON
46
CM_LIMIT_DET
47
CM_LIMIT_EVR
48
LM(+)
49
LM(-)
50
HI_C/R_SW
CL5965
XMUTN
CL5322
CL5325
1k
R5068
CL5966
CL5967
CL5968
TC74VHC08FT(EL)
IC5008
1
2
3
4
5
6
7
8
9
10
11
12
13
14
UNSW_3.0V
0.01u
C5013
100k
R5069
100k
R5070
XX
C5017
XX
C5018
XX
C5019
XX
C5020
XX
C5021
XX
C5022
XX
C5023
XX
C5024
50-1
VSP_SO
XVSP_SCK
XCS_DSP
VSP_SO
XVSP_SCK
VSP_SI
50-2
CL4436
1
A
MS118
MS117
MS116
MS114
MS113
MS105
MS104
MS119
MS111
MS81
MS83
MS82
MS7
MS72
MS76
MS75
MS74
MS92
MS96
MS7
MS23
MS24
MS84
MS83
MS82
MS81
MS77
MS75
MS72
MS69
MS68
MS63
MS106
MS112
MS97
MS98
MS99
MS95
MS24
MS23
MS80
MS79
MS78
MS60
MS59
MS57
MS56
MS47
MS48
MS68
MS117
MS63
MS45
MS46
MS69
MS115
MS43
MS44
MS71
MS119
MS49
MS50
MS51
MS52
MS104
MS105
MS116
MS107
MS108
MS59
MS76
MS95
MS58
MS74
MS71
MS56
MS57
MS58
MS91
MS54
MS53
MS52
MS51
MS50
MS49
MS48
MS47
MS46
MS45
MS43
MS85
MS44
MS87
MS9
MS9
MS39
MS40
MS41
MS42
MS55
MS53
MS54
MS97
MS85
MS96
MS99
MS98
MS113
MS114
MS20
MS22
MS22
MS20
MS39
MS40
MS41
MS42
MS61
MS55
MS80
MS79
MS78
MS87
MS74
MS75
MS76
MS26
MS27
MS28
MS29
MS30
MS19
MS17
MS16
MS15
MS14
MS13
MS11
MS10
MS8
MS31
MS32
MS33
MS35
MS36
MS37
MS38
MS60
MS60
MS115
JC-20 BOARD (14/14)
56
JC-20 BOARD (11/14)
57
(SEE PAGE 4-105)
CM-59 BOARD (1/3)
CN001
58
JC-20 BOARD (11/14)
44
JC-20 BOARD (7/14)
REC/PB
Drum speed servo
Drum servo(speed and phase)
SIGNAL PATH
Drum phase servo
49
JC-20 BOARD (9/14)
JC-20 BOARD (14/14)
51
52
JC-20 BOARD (13/14)
JC-20 BOARD (14/14)
53
50
JC-20 BOARD (9/14)
54
JC-20 BOARD (11/14)
JC-20 BOARD (11/14)
55
-REF.NO.:20,000 SERIES-
JC-20 BOARD (10/14)
MECHANISM CONTROL 2
XX MARK:NO MOUNT
F
05
9
I
17
8
K
14
15
2
H
11
13
C
7
18
E
6
N
B
16
12
L
5
4
3
D
J
M
G
10
IC5008
IC5006
19
IC5003
FVJ-1 FLAT CABLE
THROUGH THE
Capstan servo(speed and phase)