Hitachi 32PD3000E - Schematic Page 6; COMB Filter; SVHS Output

32PD3000 / 42PD3000
29
Schematic Page 6 ; COMB Filter / SVHS Output
IC101 COMB filter ; TC9090AF
supply voltage ; +5V at pin 15, 18 and 27
control by I
2
C ; SDA at pin 8 and SCL at pin 9
CVBS from IC100 pin 26 is filtered by C800/C801/L800/C802 and connected to pin 3
Y/C separate signals output from IC101 pin 25/23 are also filtered by Q801 base circuit
and Q802 base circuit
Y is amplified to adjust the level at Q119/Q120 for return signal to
IC100 and SVHS Y signal output via buffer Q803
C is amplified to adjust the level at Q121/Q122 for return signal to
IC100 and SVHS C signal output via buffer Q804
IC101 requires clock at pin 19 supplied from IC100.
SVHS100 SVHS output connector
pin functions
1 GND
2 GND
3 C
4 Y
5 GND(SW)