Hitachi DV-RV8500E/UK Service Manual page 87

From
System V.H/SW
80
To System V.ENV
83
85
PB-AMP
SP CH2
SP CH2
86
PB-AMP
SP CH1
SP CH1
87
89
PB-AMP
EP CH2
EP CH2
90
PB-AMP
EP CH1
EP CH1
91
IC301
HA118725
4.3MHz 4.3MHz
16 LIM
BPF A-BELL
4.286MHz
46
C-CCD
55
HA118725
CLOCK Drive
53
49
Y-CCD
51
V. OUT
6dB
29
AMP
D-V SYNC
SQUELCH
28
From
System
CLEAR
SYNC
FBC
Video ALC
VIDEO
AGC
ATT ATT ATT ATT
-10dB -6dB -10dB -10dB
21 15
17 19
+ + + +
AGC 1.1MHz PB 2.2MHz
14 X2 X2
AMP BPF BELL BPF
AGC
DET
1.107MHz
4.43MHz
78 71 69
74 73
X-tal Serial Cont
VCO/OSC interface
SP
CTL Trap
ACC C LPF D EALY
2M LPF
HIFI Trap
EP
TRAP FM AGC P.EQ G.EQ D LIM
IC201
LA70100M
1/4 SYNC 1.1MHz 1.1MHz REC
DIVIDER GATE BPF A-BELL MUTE
1.107MHz
57
IC301
VCD
(-4dB)
APC/ACC
DET
Main
C-LPF
Conv2
ACC SPF
Main
C-LPF
Conv1
HPF
D.E. NL EMPH
Y-LPF
YNR
SYNC
SEP
LPF CLAMP CLAMP
36 40 38 37 33 35
IC201
LA70100M
2.2MHz 4.3MHz SYNC 4.3MHz 4.3MHz
LIM
TRAP BPF GATE BPF A-BELL
VM
4.286MHz
57 45
65
2fsc
Main APC/ACC
VCA CCD LPF
Conv2
L- DET BPF BD
Main
Conv1
NL
DEMO MAIN
Y LPF
CLAMP
DE-EMPH
S LPF DE-EMPH
YNR
CLAMP
8 9 33 35 37 38
12
4.43MHz
45 65 77 73 74 71
2fsc
Serial Cont X-tal
interface VCO/OSC
L-DET
f0=1.68M
MIX REC
CCD
ATT TRAP
LPF
B.E
C.K
FBC MAIN FM
LPF HPF TRAP
ALC EMPH MOD
f/0DEV
Adjst
9 8 11
PB
18
MUTE
42 46
C-CCD
55
CLOCK Drive
53
49
Y-CCD
51
EXT
MIX
29
AMP
INT
DET
SQUELCH 28
C.K
CLEAR
SYNC
SYNC SEP 31
FBC
Sharpness
NC
Video ALC
CONTROL
LPF LPF
40 36
69
V.H/SW
From
80
System
85
REC-AMP
LPF
SP CH2
86
REC-AMP
SP CH1
87
VCA
89
REC-AMP
EP CH2
90
REC-AMP
EP CH1
91
V. OUT
From
D-V SYNC
System
SP CH2
SP CH1
EP CH2
EP CH1