Schematic Page 6 ; Comb Filter / Svhs Output - Hitachi 32PD3000E Service Manual

Schematic Page 6 ; COMB Filter / SVHS Output

IC101 COMB filter ; TC9090AF
supply voltage ; +5V at pin 15, 18 and 27
control by I
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
IC101 requires clock at pin 19 supplied from IC100.
SVHS100 SVHS output connector
pin
1
2
3
4
5
2
C ; SDA at pin 8 and SCL at pin 9
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
functions
GND
GND
C
Y
GND(SW)
32PD3000 / 42PD3000
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