Panasonic WJ-FS28 Service Manual page 25

1.9.
IC918 on the Main Board is using the Sync Signal Generator IC MN676021PPS.
Description of this IC is as follows:
Vcc1 1
Vss1 2
EX4fscI 3
4fscOSCI 4
4fscOSCO 5
SC1 6
SC2 7
(TOP VIEW)
BSC 8
VPCO 9
EXT/INT 10
LSWCONT 11
LSW 12
VR 13
EX282fHI 14
EX282fHI VR Vcc2 VPCO Vss2
28
14 13
PHASE
COMP
282fH
15
2fH
16
fH
fv
17
11
4
5 3 10
4fscOSCO EX4fscI EXT/INT
28 Vcc2
27 Vss2
26 SYNC
25 VD
24 WHD
23 BLK
22 CP1V
21 CP2
20 WBLK
19 BF
18 SCBLK
17 HPCO
16 282fHOSCI
15 282fHOSCO
LSW
9 27 12
LSW
GEN
21
CP2
22
CP1V
24 WHD
26 SYNC
BLK
23
20 WBLK
18 SCBLK
BF
19
25 VD
8 BSC
7 SC2
CLK
6 SC1
EXT/INT
2
1
Vcc1 Vss1
Pin Name I/O
1 Vcc1
2 Vss1
3 EX4fscI
4 4fscOSCI
5 4fscOSCO
6 SC1
7 SC2
8 BSC
9 VPCO
10 EXT/INT
11 LSWCONT
12 LSW
13 VR
14 EX282f I
H
15 282f OSCO O 282fH VCO signal output terminal.
H
16 282f OSCI
H
17 HPCO
18 SCBLK
19 BF
20 WBLK
21 CP2
22 CP1V
23 BLK
24 WHD
25 VP
26 SYNC
27 Vss2
28 Vcc2
22
Description
– +5V supply terminal for Chroma
Subcarrier.
– Ground terminal for Chroma
Subcarrier.
I External 4fsc Clock input
terminal; EXT/INT = "H"
I Crystal Oscillator input
terminal; EXT/INT = "L"
O Crystal Oscillator output
terminal; EXT/INT = "L"
O Chroma Subcarrier signal
(fsc(R–Y)) output terminal.
O Chroma Subcarrier signal
(fsc(B–Y)) output terminal.
O Burst signal output terminal.
O Phase Comparator output terminal.
I Sync Mode switching signal
input terminal.
"H" = External Sync Mode
"L" = Internal Sync Mode
I Line Switch Control signal input
terminal.
O Line Switch signal output terminal.
I Vertical Reset signal input terminal.
I External Clock input terminal; 282f
I 282fH VCO signal input terminal.
O Phase Comparator output terminal.
O Subcarrier Blanking signal output
terminal.
O Burst Flag output terminal.
O Wide Blanking signal output
terminal.
O Clamp Pulse output terminal.
O Clamp Pulse output terminal.
O Blanking signal output terminal.
O Wide HD output terminal.
O Vertical Sync signal output
terminal.
O Composite Sync signal output
terminal.
– Ground terminal for Vertical and
Horizontal Circuits.
– +5V supply terminal for Vertical
and Horizontal Circuits.
H