Video Processor - Zenith A19A02D Service Manual

+35 volts DC at CX3272
+215 volts DC at junction CX3296 and RX3277
CRT filament at pins 1 and 2 of connector 2F5
VIDEO PROCESSOR ICX2200
Key Operating Signals:
Composite Video out at pin 47
Video in at pin 37
Luminance in pin 43
Chroma in pin 45
Composite Audio out at pin 2
Horizontal Drive at pin 32
Vertical Drive at pin 24
Video Output Blue at 2C5 pin 3
Video Output Green at 2C5 pin 2
Video Output Red at 2C5 pin 1
B+ 9 volts pins 9, 46 and 48
Serial Data, Serial Clock pins 27 and 28
VERTICAL CIRCUIT
Vertical drive pulse pin 4
CM150
SERVICING (continued)
+25 volts pin 6
Vertical out pin 2
HORIZONTAL CIRCUIT
Horizontal drive to base of Q3201 predriver
Driver transformer output base of Q3202
Shutdown voltage anode ZFX3004
SERVICE ADJUSTMENTS (Mechanical)
1. Video Gain (19"/20" Models) Adjusts R9738 for 1
3-3
GA - SERVICING