Zenith ZDX-313, Service Manual

Page: 34 / 136

3-23 3-24
2. TU/IF BLOCK DIAGRAM
A.IN CH S/W REG 5V CONTROL V
.IN
RF AGC NC ENABLE CLOCK D
ATA
AFT A.OUT SIF TU 30V NC V
.OUT
999
GND
100 AFT
732 TU.V.OUT
875 MOD A.IN
61 MOD CTL
107 5V
26 VCR 'H'
971 MOD VEDIO
71 IIC CLK
72 IIC DATA
781 SIF OUT
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
COMBI NTSC
158 33V