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Vertical Output
Figure 7
Positive and Negative Vertical drive from the Small Signal Board is fed to the Vertical Output IC7501 which
drives the Vertical Yoke. The Vertical Pulse on Pin3 drives 7513 to produce the VFB (Vertical Feedback signal)
for the Small Signal Board. A failure in the Vertical Output circuit will be detected by the Signal Processor on
the SSB by sensing the Frame Drive line and by the Microprocessor sensing the loss of the VFB pulse. While
turning the set On, check the plus and minus 13 volt sources. Then check for Vertical Drive on Pin 7 with an
oscilloscope while turning the set On.
VIDEO SIGNAL FLOW
There are four variations in the signal flow path for the H8 chassis. They are the Non-PIP, the Single Tuner
PIP, the Dual Tuner PIP, and the Double Window version.
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