JVC XV-521BK Service Manual page 44

XV-521BK/523GD/522SL
TC74VHC00FT-X (IC503) : Wright timing control
1.Terminal layout / Block diagram
Vcc 4B 4A
12
14 13
2
1 3
1A 1B 1Y
TC7SH32FU-X (IC312) : Timing control
1.Terminal layout
IN B 1
IN A 2
GND 3
1-44
4Y 3B 3A 3Y
11 10 9 8
6
4 5 7
2A 2B 2Y GND
5 VCC
4 OUT Y
TC7WH74FU-X (IC374) : Clock buffer
1.Terminal layout
2.Block diagram
CK 1
D 2
Q 3
GND 4
TC7SH08FU-X (IC311) : Timing control
1.Terminal layout
IN B
1
IN A
2
GND 3
8 VCC
7 PR
6 CLR
5 Q
5 VCC
4 OUT Y