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3-3. OVERALL BLOCK DIAGRAM 3
JC-20 BOARD
CN5005 (1/2)
(2/2)
115
36
CAP FWD, CAP ON
46
34
45
33
48
27
47
26
DRUM MASTER CLK
63
31
9
50
69
35
71
40
68
28
30
DRUM PG, DRUM FG
117
29
116
CM (+), CM (–)
49
43
44
50
51
45
52
46
1
X5001
20MHz
2
44
39
43
38
JC-20 BOARD
XSYS RST
(1/2)
2
7
OVERALL 2
119
41
SEE PAGE 3-3
MECHANISM
IC5003
(2/2)
CONTROL
CN6002
LANC IN
1
19
LANC OUT
2
17
XLANC PWR ON
JIG PIN
21
15
EJECT
(FOR CHECK)
17
3
PARSLEY MODE
1
27
XRESET
30
5
CN6001 (2/2)
HI SI, HI SO,
IC6001
10
34
HI SCK, XCS MO
8
33
MODE
6
35
CONTROL
12
32
(SEE PAGE 4-40)
XSLEEP
61
3
XIC RST
38
HD-024 BOARD
2
MO XWAKEUP
(2/2)
62
4
H
XSYS RST
CN703 (2/2)
9
14
OVERALL 4
16
50
MO SCK, MO SO, MO SI
SEE PAGE 3-8
18
49
20
48
XCS UVIC
58
22
UVIC BUSY
65
23
UVIC SWIN
24
67
IC6004
66
(SEE PAGE 4-40)
CN1101 (3/3)
VD FROM HI
28
64
VD-31 BOARD
VD TO HI
CN002 (1/2)
29
B
S/XV
OVERALL 1
27
25
PB/XEE
SEE PAGE 3-2
26
26
40
JC-20 BOARD
OSD VD
(1/2)
1
OVERALL 2
X6001
SEE PAGE 3-3
20MHz
05
HD-024 BOARD (1/2)
CN001 (1/2)
CAP FG
15
17
18
DRUM FWD,
DRUM ON
24
25
20
HI C/R SW
1
CAP PWM
16
L. P. F.
6
7
IC300
(1/3)
L. P. F.
REEL PWM
(SEE PAGE 4-68)
11
L. P. F.
8
9
IC500
(1/2)
DRUM PWM
7
16
23
L. P. F.
L. P. F.
(SEE PAGE 4-70)
21
DRUM PG, DRUM FG
22
CM+, CM–
8
7
CM LIMIT ON,
CM LIMIT DET
6
CM LIMIT ON, CM LIMIT DET
5
REEL FWD,
REEL ON
12
13
REEL M FG
10
CN5005 (2/2)
SREEL FG,
(SEE PAGE 4-37)
113
SREEL FG, TREEL FG
18
TREEL FG
114
19
TAPE ON
TAPE TOP
53
7
TAPE END
TAPE END
54
8
CHIME SCK,
CHIME SCK, CHIME SDA,
CHIME SDA,
71
22
CHIME VDD
CHIME VDD
72
23
73
24
REC PROOF
REC PROOF
85
13
(2/2)
L CASSETTE
L CASSETTE
12
97
10
20
XCC DOWN
22
11
IC5008
LEVEL SHIFT
(SEE PAGE 4-38)
18
68
TAPE LED ON
TAPE LED ON
55
6
S REEL ERR,
S ELTN ERR,
22
72
T REEL ERR
T ELTN ERR
98
17
99
16
81
DW DET
DEW DET
96
14
82
83
42
4
MODE SW D-A
MODE SW D-A
ı
ı
39
1
41
LM (+), LM (–)
LM (+), LM (–)
104
48
105
49
3-5
CAP FG
CAP FWD, CAP ON
DRUM FWD, DRUM ON
DRUM CLK
7
Q100
CAPSTAN
6
46
SWICHING
IC100
Q102
REEL
30
39
DC CONTROL
SWICHING
(SEE PAGE 4-67)
Q103
DRUM
25
40
17
SWICHING
Q101
44
6.25V
SWICHING
60
42
41
39
40
15
Q200
REEL ERROR
4
BUFFER
REEL FWD, REEL ON
26
6
IC202
REEL M FG
2
1
REEL FG AMP
3
(SEE PAGE 4-69)
CN001 (2/2)
REEL FG AMP
33
S REEL FG, T REEL FG
20
IC300
32
23
(SEE PAGE 4-68)
TAPE TOP
44
14
TAPE TOP/END
TAPE END
DETECT
43
17
29
CHIME SCK, CHIME SDA, CHIME VDD
28
27
REC PROOF
38
L CASSETTE
39
XC IN
C IN
41
CC DOWN
40
XC IN
3
TAPE LED
45
34
35
DEW
37
47
MODE D-A
ı
50
IC300
3
LM+, LM–
(3/3)
25
2
24
LOADING MOTOR
DRIVER
(SEE PAGE 4-68)
CN400
CAPSTAN
23
16
24
FG AMP
22
17
IC400
(SEE PAGE 4-68)
14
15
14
CAPSTAN
MOTOR
13
5
8
DRIVE
7
7
3
9
10
9
54
55 53
CN500
5 20
5
25
4
6
22
1
IC501
DRUM
3
2
PREDRIVE
(1/2)
26
21
4
23
23
24
1
18
DRUM MOTOR
2
IC500
(2/2)
DRIVE
27
6
24
19
(SEE PAGE 4-70)
(SEE PAGE 4-70)
4
DRUM PG/FG
1
11
DRIVE
63
10
IC501
30
8
CN501
31
12
(2/2)
CM LOAD, CM UNLOAD
9
2
C MOTOR
C MOTOR
DRIVE
11
1
32
17
DRIVE
33
13
(SEE PAGE 4-70)
CN201
CN1
21
1
1
IC200
REEL V/U/W
ı
ı
22
REEL
6
6
23
MOTOR
DRIVE
(SEE PAGE 4-69)
9
FG1, FG2
9
12
12
SFG IN
S REEL FG
19
13
13
S REEL FG
IC5
(2/3)
TFG IN
T REEL FG
22
14
14
T REEL FG
IC4
TAPE TOP
TOP SENS
13
21
21
16
CHIME2 (SCK)
CHIME3 (SDA)
18
18
CHIME4 (VDD)
17
17
16
16
REC PROOF
15
15
CN200
CN2
L CASSETTE
L CASSETTE
14
14
C IN
C IN
3
3
CC DOWN
CC DOWN
2
2
TAPE END
END SENS
1
1
HD-024 BOARD
(2/2)
OVERALL 4
SEE PAGE 3-8
Q1
Q2
(TAPE TOP)
(TAPE END)
TAPE LED
TAPE LED
12
12
S ELETEN
S ELETEN, T ELETEN
T ELETEN
8
8
9
9
DEW
DEW
15
15
DEW
7
7
MODE D-A
MODE D-A
MODE
ı
ı
SW
4
4
CN300
1
LM+, LM–
M902
2
M M
29
2
CAM MOTOR
3-6
DSR-11
M903
FG2, FG1
CAP
FG
U, V, W
CAPSTAN
MOTOR
M901 (2/2)
U, V, W
DRUM
MOTOR
PG, FG
DRUM
PG
M905
M M
FL MOTOR
M904
CN3
1
V, U, W
REEL
ı
6
MOTOR
8
MR FG1, MR FG2
REEL
10
FG
MD-76 BOARD
FOR CASSETTE
MEMORY
D1
(TAPE LED)
S3
S2
S1
(CC DOWN)
(C IN)
(L/S CASSETTE)
IC2
2
IC1
H
3
1
ELETEN
7
ERROR AMP
6
H
(SEE PAGE 4-117)
7
IC3
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