JVC Super VHS Service Manual page 39

4.25 CPU/MDA SYSTEM BLOCK DIAGRAM
0 1 MAIN (CPU)
IC103
1
CE
(RTC)
3
SIO
2
SCLK
7
OSCIN
5 6
OSCOUT
X102
32.768KHz
IC102
(EEPROM)
6
SCK
2
SO
R154
5
SI
1
CS
Q101,Q102
FROM REG
BATTERY
UNREG
CHECK
TO VTR/ASP
SCK3
TG/CDS
SO3
4
SCK3
TO F/Z/I/MDA
SO3
V_ASP_CS
TO VTR ASP
V_FF
SCK3
TO
SO3
DSP
V_DSP_CS
V_PULSE
TO V_FF
DSP V_OVL_A
V_OVL_B
IRIS O/C
IRIS PWM
FROM/TO
LENS CS
DSP
DSP REST
F/Z/I/MDA
LENS CLK
LCD/CVF
HALL A/D
VD H
FROM
CN7
DEW_SENSOR DEW SENS 11
3
CN13
TRIG_SW 9
FROM
PHOTO_SW
3
ZOOM UNIT
ZOOM_SW
1
X101
MAIN SYSTEM
SENSOR
CLOCK
(16MHz)
CN2
ROTARY
11
ENCODER
10
12
CASS SW
9
REC SAFE SW
14
TU_SENS
6
2
SUP SENS
8
STR SENS
2
END SENS
1
TOP OPE UNIT
EJECT SW CN18
5
CN25
PB CTL 27
JIG_CONN.
(VTR ASP)
1
IC3501
CTL HEAD
CN7
CTL_HED+ 40 37
A/C
CTL
6
CTL_HED- 41 35
AMP
HEAD 7
A B
(M. MDA)
IC101(CPU)
IC1601 DRUM
28
RTC CS
175
AL SI
22 19
DRUM CLK
1
AL CLK
27 14
DRUM ON
42
58 6
DRUM REF
V CC
176
AL SO
32
EEPROM CS
116
D_PWR_ON
113 26
DRUM PG
120
BATT
109 27
10 DRUM FG
SCK3
9
SO3
10
33
V_ASP_CS
35
34
V_DSP_CS 34
-
79 +
V_PULSE
73
V_FF
74
V_OVL_A
75
V_OVL_BCD
111
25
CAP_FG
16
24
IRIS O/C
59
IRIS PWM
41 R1610
LENS MDA CS
4
DSP RST
26 R1609
LENS MDA CLK
125
HOLE
96 C1628
VD 90
CVM DET
84
LOAD F
122
DEW SENS 80
LOAD R
46
TRIG SW
115
PHOTO_SW
130
ZOOM SW
71
X1
70
X2
106
CAM_SW_A
107
CAM_SW_B
108
CAM_SW_C
45
CAS_SW
92
REC_SAFE_SW
53
TUPSENS
54
SUPSENS
118
START SENS
119
EN SENS
93
EJECT SW
57
CAP REF
REG_3.2V
TO REG
R1617
83 38
REC CTL CAP STOP
42
CAP FR
R1618
C
ROTOR POSI
3
POSITION
DET
START UP TIMMING SWITCHING
CONTROL CONTROL DET
59
FORWARD
C1617
/STOP
61
OUTPUT
C1618
DRIVE
63
5
48
+
+
-
-
UPPER/LOWER
SATURATION
PREVENTION
2
R1601
R1608
31
R1607
30
C1610
- -
+ + C1609
PG AMP FG AMP
R1605
29
R1606
28
REFERENCE C1607
VOLTAGE
- C1608
33
+
WAVEFORM 32
SYNTHEZING
IC1601
CAPSTAN & DRUM
C1611
DRUM MOTOR
IC1601
UNDER LIMIT
DET
CAPSTAN
UPPER VCE
DET
UPPER VCE
DET
LOGARITHMIC
REVERS CONVERSION
&
DIFFERENTIAL
DISTRIBUTION
DIFFERENTIAL
DISTRIBUTION
&
TORQE RIPPLE
COMPENSATION
VB
CONTROL AMP
40
+
+
39
-
+
R1611
R1612 -
41
V
R1613 REF
36
D 4-53 4-54 E
C1619
8 58
L FWD
AMP DECODER
9 L REV DIFF 55
AMP
VB
56
VOLTAGE
CONTROL
IC1601 LOADING
REG 3.2V
REG 3.2V
IC1602 R1626
3 R1624
4
+ Q1601
R1621
-
1
R1627
R1625
R1622
DRUM MOTOR
SHORT CIRCUIT
DET
16
SW REG
DRIV
FROM REG
21
MTR_OSC
18
SW REG
DRIV
38
C1612
CAPSTAN
CAPSTAN
UNDER
SHORT CIRCUIT
LIMIT
PROTECTION DET
DET
43
54
DRIVE 53
AMP
52
+
-
V REF
44
+
45
-
HALL
49
+
INPUT HG
46
SYNTHES AMP -
50
(MATRIX)
+
51
-
R1615
REG_3.2V
R1616
FOR WARD
REVERSE
SELECTION
F
CN1
7 CENTER
1 D COIL U
2 D COIL U
3 D COIL V
DRUM MOTOR
4 D COIL V
5 D COIL W
6 D COIL W
M
CN1
D PG-
10
D FG-
8
LOADING MOTOR
CN4
1 LOAD FWD
M
2 LOAD REV
(REG)
Q6401
DRM PWR
DRUM
POWER CTL
DRM CTL
M UNREG F6002
F6001
ADP DC
UNREG
Q6501
CAP PWR
CAPSTAN
POWER CTL
CAP CTL
CN3
C FG+
16
CAPSTAN MOTOR
13 C COIL U
14 C COIL U
M
11 C COIL V
12 C COIL V
8 C COIL W
9 C COIL W
4 HG U+
7 HG U-
2 HG V+
1 HG V-
3 HG W+
10 HG W-
5 HG BS+
6 HG BS-
G H