Panasonic Omnivision VHS PV-C2780, Service Manual

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S-VHS
VHS
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18 19
20 21
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28
ARTIFICIAL
V/H SYNC MIX
Y/C MIX
AGC
GAIN
CTL AMP
LPF
CLAMP
REC
PB
LINE1
LINE2
TUNER
AGC DET
GCA
DETECTOR
CLAMP
VCC
GND
COLOR
KILLER
SW
VREG
29
30
31
32
33
34
35
REC RF
EQUALIZER
CLAMP
YNR
HPF LIMITER
HPF
ANR
REC PB
DOC SW
ON
OFF
FM
MODULATOR MAIN
EMPHASIS W/D
CLIP
47 46 45
44 43
36
37
38
39
40
41
42
Y/C
AT ENVE
DETEC-
TOR
RF
AGC
PHASE
COMPENSATOR
PB
REC
629KHz
TRAP
8MHz
TRAP
AGC
DET
GND
PEAKING BPF
/GAIN CTL AMP
DOP
DETECTOR
VCC
REC-ON
REC
AMP
53
52
51
50
49 48
PB
ENVE
DETECTOR
FM
DEMODULATOR
DOUBLE
LIMITER
ROTARY
SW
COLOR
KILLER SW
MAIN
DE-EMPHASIS
60 59 58 57
56
55
54
PB AMP
REC
-OFF
REC-ON
REC-ON
LPF
629kHz
LPF
LP/SLP
REC
REC
AMP
+
SP
LP/SLP
63
62 61
REC
AMP
AGC DET
PB
REC
SLP-
ON
SP/LP-ON
REC-ON
LP/SLP
-ON
LINE
AMP
fH
TRAP
GND
70
69
68
67
66
65
64
VCC
75
74
73
72
71
TUNER
1/2
VCC
LINE
MUTE
PB
APC
4 PHASE
SELECT
GND
79
78
77
76
VCO 1/4
CONV
1/40 AFC
SIDE LOCK
COLOR
KILLER
DETECTOR
FREQUENCY
DET
REC
PB
GND
+
1/4
-1
1 2 3 4
84
83
82
81
80
CNR
VXO
BPF X2
SUB
VCC
2FSC
FSC
CHROMA
PHASE
COMPEN-
SATOR
REC VIDEO SIGNAL PB VIDEO SIGNAL REC AUDIO SIGNAL PB AUDIO SIGNAL
5 6 7 8
I C BUS
BURST
UP/DOWN
REC
PB
ACC
3.58MHz
BPF
ACC DET
9
10
11
12
13
14
15 16
SYNC
ATT
REC
PB
4.8MHz
TRAP
COMPONENT
COMPOSITE PB
REC
COMPONENT
COMPOSITE
REC
PB
LPF DELAY
REC
PB
SEPARATION
GCA
CCD
LPF
GCA
DET
REC
LIMITER
CLAMP
NON LINEAR
EMPHASIS
RF IN SUB LPF
REC
PB
REC
PB
MAIN
CONV
MAIN
CONV
LPF
REC
PB
REC
PB
LPF
+
PB
REC
ROTARY
PB
SP
2
NON LINEAR
DE-EMPHASIS
IC3001 VIDEO/AUDIO PROCESS IC-DETAIL BLOCK DIAGRAM, AN3479FBP-A
MIX
12
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37
11
TV VOLUME
CONTROL
LED DRIVER
DECODER
CLAMP
RESET
OUTPUT
CONTROL
CHARACTER
GENERATOR
DATA
SLICER
LOOP
FILTER
21th LINE
DETECTOR
H/V SYNC
SEPARATOR
DISPLAY CONTROL
VCO
PLL
GND
VDD
10
9
8
7
6
5
4
3
2
1
25
26
27
28
29
30
31
32
33
34
35
36
IC3301 8BIT MICROCONTROLLER IC-DETAIL BLOCK DIAGRAM,
LC8632165N41