Service manual

43
DV-L70S
DV-L70BL
DV-L70W
HPF
PAL SW
F/F
IDENT
PHASE
SHIFT
COLORACC
ACC DET
APC
VCO
TINT
COMP
Y/C
CIN
F ADI
VIDEO IN
COMP
TRAP COLOR
CLAMP
AGC FIL
SYNC SEP
COM AMP
ADJ
R DC DET G DC DET B DC DET
R OUT G OUT B OUT
RGB AMP ADJ
FRP
COM FRP
BRIGHT
SUB BRIGHT B
SUB BRIGHT R
EXT B IN
EXT G IN
EXT R IN
CONTRAST
SW
ϒ0
ϒ2
AGC
OUT
COM
OUT
SYNC
OUT
SYNC
IN
Y/C
1 6 45 47 46 36 35 34 38 37 20 19 22 21 25 24
33
P
N
ACC FIL
APC FIL
Vcc
GND
SYNC IN
GND Vcc1 Vcc2
KILLER FIL
CHROMA
OUT
IDENT FIL
BURST
CLEANING
5
44
3
7
11
15
17 18 43 23
14
16
13
4
PAL ON
N
N
8109
Y
48
PICTURE
12
P
P
B-Y
NPN
DEMOD
BGP
P
R-Y
R-Y
G-Y B-Y
32
27
26
29
30
31
39
40
41
42
2
REG1 REG2 REG3
TRAP
KILLER
PICTURE
BGP GEN
Window
Pulse GEN
F/F
AGCAMP
AGCDET
SYNCSEP
CLAMP
VREF
INV
ϒ
AMP
MATRIX
INT/EXT SW
ϒ
AMP
ϒ
AMP
INV INV
• Block Diagram
Pin No. Terminal name Operation function
47 AGC OUT It is the terminal which the voltage detected in the automatic gain control detector circuit of the luminance
signal is outputted in.
Output voltage rises the output voltage.
48 PICTURE The frequency characteristic of the luminance signal can do adjustment.
When a voltage is lowered, emphasis is put on the contour.
9-20. IC1900 BA7046F
Pin No. Function
1 A horizontal oscillation backlash terminal
2 HD output terminal
3 SYNC output terminal (Open Collector)
4 VD output terminal
5 GND terminal
6 Video input terminal
7 Power terminal
8 Phase comparator output terminal
• Block Diagram
1234 8765
H. OSC
V. SEPA
PHASE
COMP
SYNC
SEPA