JVC HR-S2901U Service Manual page 63

0 3 MAIN ( VIDEO , TERMINAL )
WF1 IC1-27 WF2 IC1-30
PB 2.1 Vp-p PB 0.6 Vp-p
50 mV/5 µsec/DIV 20 mV/5 µsec/DIV
Y TO SUB
Y
a
MAIN ALC DET
b
PB COLOR
C
c
Fsc
d
REC COLOR C
e
V FROM AV
Y
f
Y TO AV
Y
g
FRONT V IN
h
V FROM OSD
i
I2C DATA A/V
j
I2C CLK A/V
k
REAR1 V IN
l
J7101
2
FRONT
1
VIDEO IN
J1
ONLY USED FOR
2
REAR1
HR-S5901U/S5911U/S5911U(C)
1
VIDEO IN
HR-S3901U/S3911U/S3911U(C)
J2
2
REAR
1
VIDEO OUT
TO
TUNER
TU_VIDEO
RF_VIDEO
Q901
BUF
TO
SYSCON
V_FROM_OSD
V.PULSE
S DET
TP106
WF3 IC1-1
WF4 PB.FM WF5
PB 0.4 Vp-p
PB 0.4 Vp-p REC/PB 3.3 Vp-p
20 mV/1 msec/DIV 0.1 V/5 msec/DIV 0.1 V/5 msec/DIV
Q21
WF1
BUF
WF2
26 29 27 30
C.K
6dBAMP 6dBAMP
N P
C.SQUELCH
B.E
B.D
SQUELCH
WHITE
LIMITER
EXT
CLEAR
SYNC
INT
25
NOT
Sync.Sep.
USED
C.K
L-SECAM L-SECAM
MIX
LEVEL
ADJ
Clamp
21
P
APT CTL
22
ATT
(-10dB)
R
20
NOT
ATT
(-10dB)
USED
Video
AGC
NOT 18
ATT
USED (-10dB)
16
C
ATT
(-10dB)
C
WF10
I2C
LOGIC
46
DATA
45
CLK
TP111
D.FF WF6 IC1-85 WF7 IC1-14 WF8
REC 3 Vp-p PB 0.5 Vp-p REC/PB 0.5 Vp-p
10 mV/5 µsec/DIV 10 mV/5 µsec/DIV
0.1 V/1 msec/DIV
TP106
WF4
PB FM
Q7-Q9
BUF
& EQ
WF3
2 1 34
CR Det.
2fsc VCO
2fsc
BDL C
VCA
P R
LPF BDL
fH LOCK CTL
R P
LEVEL
Det1 PB REC
Color Killer REC
APC
ID Det. APC AFC
CLPF Delay
LEVEL
APC ACC Det
Det2
SW
R P
1/2
DOWN
Conv
Phase SW .
Pulse
Gen.
4Phase
CLPF
Gen.
P
Main Main
CTL TRAP
ACC
Conv2 Conv1
fH HPF
R
P R R P P
HPF
TRAP
R
P
LPF
PILOT
BPF C
ADD
R
COMP
SEP .
SQPB
SQPB P
G
DL EQ
EQ
R
N.L.
REC N.L.
SQPB
De.Emph Emph
DO
AGC Det
P DLIM
Det
PB ALC
DeMOD
SQPB SQPB
SQPB ET
D.E.
EQ LPF
ET ET
Sub LPF
N.C.
FBC/ALC
Main
De.Emph
R P
YNR
DO
DO
Y /REC
BDL
Y LPF
P R
BDL R P P R
Clamp
LPF
Clamp
10 11 6 12 13 14 7
WF7
FILTER
WF9
WF8
FILTER
Y
4-35 4-36
IC1-13
WF9 IC1-11 WF10 IC1-16
REC/PB 0.5 Vp-p REC 0.68 Vp-p
10 mV/5 µsec/DIV 20 mV/5 µsec/DIV
Q12
BUF
X2
NOT
USED
42 40 38 55
fsc IN
X-tal
VCO/OSC
TP111
D.FF
WF5
Head SW1 92
PB/REC
D.FF CTL
Head SW2
Discri
91
ENV DET
HPF
1/2
. 2FL VCO
ME
100
NOT
SECAM TANC
USED
DET
SP
81
DET NOT
Comp
2M LPF
USED
DET
EP
(LP)
L-SECAM
REC 84
YCA
MUTE
L-SECAM
WF6
SP2
+
P
SP2
85
629
FM AGC
TRAP -
R
CH2
DET
SP1
-
CH1
86
SP1
+
+
88
REC EP2
Filter
-
CH2
EP2
FM MOD
CH1
-
89
fo/Dev Adj
Main Emph EP1
Carrier Offset S-DET
+
W .C/D.C
EP1
90
8
IC1
( VIDEO & AUDIO
SIGNAL PROCESSOR )
Q17,Q33
ES
TO
FMA/DEMOD
Fsc
TO
SYSCON
D.FF
VIDEO_ENV
VIDEO
U.DRUM
HEAD
CN1
6 8 8
SP CH2
7 7
5
6 6 SP CH1
4
5 5
4 4
3 LP/EP_CH2
3 3
2
2 2 LP/EP_CH1
1
1 1