JVC HR-S2902US, Service Manual, Page: 52 / 68

4.15 SYSTEM CONTROL BLOCK DIAGRAM
+5V
+5V
( 14.32MHz
)
CTL
+
CTL
-
MAIN
( SYSCON
)
END
SENSOR
REC
SAFETY
CTL
AMP
OUT
TO
D
.FF
CN2001
2
1
LSA
SYN
IN
LPF
VIDEO
SECTION
( ON
SCREEN
)
V
T
O
OSD
V
F
R
O
M
OSD
V
.
PULSE
V
.
PULSE
VIDEO/N.
A
UDIO
VIDEO
ENV
VIDEO
ENV
X3001 CLOCK
SYSTEM
MAIN
END
SENSOR
( RESET
)
RESET
SW
SAFETY
REC
S3001
SD
A
SCL
5 6
( SYSTEM
CONTR
OL
MICR
O
P
R
OCESSOR
)
IC3001
LSB LSA LSC
TP4001
CTL.
P
3
0
M
LSB LSC LSD
ENCODER RO
TA
R
Y
1 2
CN1
HEAD (+)
CTL
HEAD (-)
CTL
HEAD
HEAD
A/C
I2C
D
A
TA
A/V
I2C
CLK
A/V
S-SUB TO
17 18 23 24 50 49 47
I2C
D
A
TA
A/V
I2C
CLK
A/V
D
.FF
76 75 74
37 38
X
OUT
XI
N
Q3002
25
RESET
D3005
AL5.8V
SYS
Q3006, Q3007
I2C
D
A
TA
I2C
CLK
I2C
D
A
TA
I2C
CLK/TEST
IC3004
( SERIAL
MEMOR
Y
)
43 27
A.MUTE
( H
)
N.REC
ST
( H
)
N.REC
( H
)
N.REC
( H
)
N.REC
ST
( H
)
A.MUTE
( H
)
A.MUTE
( H
)
TO VIDEO/N.
A
UDIO
WF5
WF6
T
O
FMA/DEMOD
TO TERMINAL
CAP
.M
FG
CAP
.M
F/R
CAP
.M
VCTL
LM
F/R/S
DR
UM
PG/FG
DR
UM
VCTL
68 62 33 61 65 34
22
JSA
86
JSB
87 64 78 31
H.REC_ST(H)
H.REC_ST(H)
28
A.FF
A.FF
26
A.ENV/ND(L)
A.ENV/ND(L)
81 32 15 14 20
FL
Y_REC_ST(H)
FL
Y_REC(H)
FULL_E.ON(H)
FL
Y_REC_ST(H)
FL
Y_REC(H)
FULL_E.ON(H)
19
T
O
AD
V
. JOG/SW
CN7003
I2C
D
A
TA
I2C
CLK
V_T
O OSD
VIDEO
OUT
WF3
WF4
83
93 92
LSD
94 91
JS3001
4
3
2
5 6
1
4
9
10
11
12
12
2
1
12 10
4
11
9 1
DR
UM
MO
T
O
R
58
57
3i
n1M
D
A
/
CAP
MO
T
O
R
55
LO
ADING
MO
TO
R
M M
D PG+
D PG-
L1
L2
CAP
.M
FG
CAP
.M
F/R
CAP
.M
VCTL
LM
F/R/S
DR
UM
PG/FG
DR
UM
VCTL
CN3001
WF1
WF2
P
H
OTO
SENSOR
P
H
OTO
SENSOR
PC3001
PC3002
1 2
SP
FG
TU
FG
I2C_CLK_A/V
I2C_D
A
TA_A
V
I2C_CLK_A/V
I2C_D
A
TA_A
V
TO S
.SUB
TO 2D DIGIT
AL
S3002 S
.CASSETTE SW
S
.CASSETTE
1 3
CN7001
JSA JSB
ONL
Y USED FOR
WITH AD
V.
JOG/SW
MODEL
T
O
TUNER
S
.CASS(H)
TO FMA/DEMOD
5
V_FR
OM_OSD
ONL
Y USED FOR
WITH FL
YING ERASE MODEL
WF3
TP4001
CTL.P
PB 3.2 Vp-p
50 mV/5 msec/DIV
WF4
REC 3.8 Vp-p
0.1 V/10 msec/DIV
WF5
REC/PB 2.2 Vp-p
50 mV/5
sec/DIV
WF6
REC/PB 2.2 Vp-p
50 mV/5
sec/DIV
IC3001-49
CV_IN
IC3001-47
VIDEO_OUT
IC3001-74
CTL_+
µ
µ
WF1
CN3001-1
CAP_M_FG
REC/PB 4.6
Vp-p
0.1 V/0.5
msec/DIV
WF2
CN3001-11
D
. PG/FG
REC/PB 4.5
Vp-p
0.1 V/5
msec/DIV
D C B A
4
5
3
2
1
4-31